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IA186EM/IA188EM
8/16-Bit Microcontrollers
Data Sheet
www.DataSheet4U.com
Copyright ! 2004

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IA186EM/IA188EM
8/16-BIT Microcontrollers
Data Sheet
As of Production Version -03
Contents
Features......................................................................................................................................................4
Description ...............................................................................................................................................5
Bus Interface and Control ................................................................................................................7
Peripheral Control and Registers..................................................................................................7
Clock and Power Management....................................................................................................49
System Clocks..........................................................................................................................................49
Power-Save Mode ....................................................................................................................................50
Initialization and Reset.............................................................................................................................50
Reset Configuration Register ...................................................................................................................50
Chip-Selects .............................................................................................................................................50
Chip-Select Timing ..................................................................................................................................50
Ready and Wait-State Programming........................................................................................................50
Chip-Select Overlap .................................................................................................................................51
Upper Memory Chip Select .....................................................................................................................52
Low Memory Chip Select ........................................................................................................................52
Midrange Memory Chip Selects ..............................................................................................................52
Peripheral Chip Selects ............................................................................................................................52
Refresh Control ........................................................................................................................................53
Interrupt Control ......................................................................................................................................53
Interrupt Types .....................................................................................................................................54
Interrupt Table Notes ...........................................................................................................................55
Timer Control...........................................................................................................................................55
Direct Memory Access (DMA)................................................................................................................56
DMA Operation .......................................................................................................................................56
DMA Channel Control Registers .........................................................................................................56
DMA Priority .......................................................................................................................................57
Asynchronous Serial Port...............................................................................................................58
Synchronous Serial Port..................................................................................................................58
Programmable I/O (PIO) ................................................................................................................59
Pin Descriptions ..................................................................................................................................60
Instruction Set Summary ................................................................................................................71
Key to Abbreviations Used Instruction Summary Table .........................................................................85
Absolute Maximum Ratings .........................................................................................................90
DC Characteristics Over Commercial Operating Ranges..............................................90
AC Characteristics Over Commercial Operating Ranges (40 MHz) ...........................................................91
Waveforms .............................................................................................................................................94
Alphabetic Key to Waveform Parameters................................................................................................94
Numeric Key to Waveform Parameters ...................................................................................................95
Read Cycle Timing ..................................................................................................................................97
3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com

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IA186EM/IA188EM
8/16-BIT Microcontrollers
Data Sheet
As of Production Version -03
Write Cycle ..............................................................................................................................................98
Write Cycle Timing .................................................................................................................................99
PSRAM Read Cycle...............................................................................................................................100
PSRAM Read Cycle Timing..................................................................................................................101
PSRAM Write Cycle..............................................................................................................................102
PSRAM Write Cycle Timing .................................................................................................................103
PSRAM Refresh Cycle ..........................................................................................................................104
PSRAM Refresh Cycle ..........................................................................................................................104
Interrupt Acknowledge Cycle ................................................................................................................105
Interrupt Acknowledge Cycle Timing ...................................................................................................106
Software Halt Cycle ...............................................................................................................................107
Software Halt Cycle Timing ..................................................................................................................107
Clock – Active Mode .............................................................................................................................108
Clock – Power-Save Mode ....................................................................................................................108
Clock Timing .........................................................................................................................................108
srdy – Synchronous Ready.....................................................................................................................109
ardy - Asynchronous Ready ..................................................................................................................109
Peripherals..............................................................................................................................................109
Ready and Peripheral Timing.................................................................................................................109
Reset 1....................................................................................................................................................110
Reset 2....................................................................................................................................................110
Bus Hold Entering..................................................................................................................................111
Bus Hold Leaving ..................................................................................................................................111
Reset and Bus Hold Timing ...................................................................................................................111
Synchronous Serial Interface .................................................................................................................112
Synchronous Serial Interface Timing ....................................................................................................112
IA186EM 100-Pin PQFP ...........................................................................................................................113
IA186EM TQFP 100-Pin ...........................................................................................................................116
IA188EM 100-Pin PQFP ...........................................................................................................................119
IA188EM 100-Pin TQFP ...........................................................................................................................122
Physical Dimensions ..................................................................................................................................125
PQFP 100 ...............................................................................................................................................125
TQFP 100 .............................................................................................................................................127
Ordering Information......................................................................................................................128
Errata.......................................................................................................................................................129
3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com

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IA186EM/IA188EM
8/16-BIT Microcontrollers
Data Sheet
As of Production Version -03
Please Note
Included in the Ordering Information section on page 128 of this manual are enhanced RoHS-compliant
versions of the IA186 and IA188 family of microcontrollers. However, standard packaged or non RoHS-
compliant versions of the IA186 and IA188 microcontrollers are still available.
Features
" Pin-for-pin compatible with AMD# Am186EM/188EM devices
" All features are retained, including:
" PLL allowing same crystal/system clock frequency
" 8086/8088 instruction set with additional 186 instruction set extensions
" Programmable interrupt controller
" Two DMA channels
" Three 16-bit timers
" Programmable chip select logic and wait-state generator
" Dedicated watch dog timer
" Two independent asynchronous serial ports (UARTs)
o DMA capability
o Hardware flow control
o 7-, 8-, or 9-bit data capability
" Pulse Width Demodulator feature
" Up to 32 programmable I/O pins (PIO)
" Pseudo-static/dynamic RAM controller
" Fully static CMOS design
" 40 MHz operation at industrial operating conditions
" +5 VDC power supply
" Available packages:
o 100-pin Thin Quad Flat Pack (TQFP)
o 100-pin Plastic Quad Flat Pack (PQFP)
The IA186EM/188EM is a form, fit and function replacement for the original Advanced Micro Devices#
Am186EM/188EM family of microcontrollers. Innovasic produces replacement ICs using its MILESTM,
or Managed IC Lifetime Extension System cloning technology. This technology produces replacement
ICs far more complex than "emulation" while ensuring they are compatible with the original IC.
MILESTM captures the design of a clone so it can be produced even as silicon technology advances.
MILESTM also verifies the clone against the original IC so that even the "undocumented features" are
duplicated.
This data sheet contains preliminary information for the IA186EM/188EM. The complete data sheet
which documents all necessary engineering information about the IA186EM/188EM including functional
and I/O descriptions, electrical characteristics, and applicable timing will be available when the device
nears completion.
3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com

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IA186EM/IA188EM
8/16-BIT Microcontrollers
Data Sheet
As of Production Version -03
Description
The IA186EM/188EM family of microcontrollers replaces obsolete AMD# Am186EM/188EM devices,
allowing customers to retain existing board designs, software compilers/assemblers and emulation tools,
thereby avoiding expensive redesign efforts.
The IA186EM/188EM microcontrollers are an upgrade for the 80C186/188 microcontroller designs, with
integrated peripherals to provide increased functionality and reduce system costs. The Innovasic devices
are created to satisfy requirements of embedded products designed for telecommunications, office
automation and storage and industrial controls.
A block diagram of the IA186EM/188EM microcontroller is depicted in Figure 1. The IA186EM/188EM
microcontroller consists of the following functional blocks, with brief discussions of each afterwards.
" Bus Interface and Control
" Peripheral Control and Registers
" Chip Selects and Control
" Programmable I/O
" Clock and Power Management
" Direct Memory Access (DMA)
" Interrupt Controller
" Timers
" Asynchronous Serial Ports
" Synchronous Serial Interface.
3737 Princeton NE, Ste 130 • Albuquerque, NM 87107 • Tel 505.883.5263 • Fax 505.883.5477 • www.Innovasic.com