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Freescale Semiconductor
Technical Data
Integrated Stepper Motor Driver
with Embedded MCU and LIN
Serial Communication
Document order number: MM908E626
Rev 3.0, 12/2005
908E626
The 908E626 is an integrated single-package solution that includes
a high-performance HC08 microcontroller with a SMARTMOSTM
analog control IC. The HC08 includes flash memory, a timer, enhanced
serial communications interface (ESCI), an analog-to-digital converter
(ADC), serial peripheral interface (SPI) (only internal), and an internal
clock generator (ICG) module. The analog control die provides fully
protected H-Bridge outputs, voltage regulator, autonomous watchdog,
and local interconnect network (LIN) physical layer.
The single-package solution, together with LIN, provides optimal
application performance adjustments and space-saving PCB design. It
is well suited for the control of automotive stepper applications like
climate control and light-levelling.
STEPPER MOTOR DRIVER
WITH EMBEDDED MCU AND LIN
Features
• High-Performance M68HC08EY16 Core
• 16 K Bytes of On-Chip Flash Memory
• 512 Bytes of RAM
• Internal Clock Generation Module
• Two 16-Bit, 2-Channel Timers
• 10-Bit Analog-to-Digital Converter
• Four Low RDS(ON) Half-Bridge Outputs
• 13 Microcontroller I/Os
DWB SUFFIX
98ARL105910
54-TERMINAL SOICWB-EP
Device
MM908E626AVDWB
Temperature
Range (TA)
-40°C to 115°C
908E626 Simplified Application Diagram
Package
54 SOIC
WB-EP
LIN
VREFH
VDDA
EVDD
VDD
908E626
VSUP[1:3]
VREFL
VSSA
EVSS
VSS
RST
RST_A
IRQ
IRQ_A
SS
PTB1/AD1
RXD
PTE1/RXD
PTD1/TACH1
FGEN
BEMF
PTD0/TACH0/BEMF
GND[1:2] EP
HB1
HB2
HB3
HB4
HVDD
Port A I/Os
Port B I/Os
Port C I/Os
Bipolar
N
S
Step
Motor
Switchable Internal
VDD Output
Microcontroller
Ports
Figure 1. 908E626 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2005. All rights reserved.

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GND1-2
VSUP1-3
RST_A
IRQ_A
BEMF
FGEN
LIN
RXD
SS
PTE1/RXD
PTD1/TACH1
PTD0/TACH0
PTB1/AD1
RST
IRQ
VREFL
VSSA
EVSS
EVDD
VDDA
VREFH
Internal Bus
PORT C PORT D PORT E
DDRC DDRD DDRE
DDRA
PORT A
DDRB
PORT B
908E626
2
Figure 2. Figure 1. 908E626 Simplified Internal Block Diagram
Analog Integrated Circuit Device Data
Freescale Semiconductor

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TERMINAL CONNECTIONS
TERMINAL CONNECTIONS
Transparent Top
View of Package
PTB7/AD7/TBCH1
PTB6/AD6/TBCH0
PTC4 /OSC1
PTC3 /OSC2
PTC2 / MCLK
PTB5 /AD5
PTB4 /AD4
PTB3 /AD3
IRQ
RST
PTB1/AD1
PTD0 / TACH0 / BEMF
PTD1/TACH1
NC
FGEN
BEMF
RST_A
IRQ_A
SS
LIN
NC
NC
HB1
VSUP1
GND1
HB2
VSUP2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
Exposed
Pad
54 PTA0/KBD0
53 PTA1/KBD1
52 PTA2/KBD2
51 FLSVPP
50 PTA3/KBD3
49 PTA4/KBD4
48 VREFH
47 VDDA
46 EVDD
45 EVSS
44 VSSA
43 VREFL
42 PTE1/RXD
41 RXD
40 VSS
39 NC
38 VDD
37 NC
36 NC
35 NC
34 HVDD
33 NC
32 HB4
31 VSUP3
30 GND2
29 HB3
28 NC
Figure 3. 908E626 Terminal Connections
Table 1. 908E626 TERMINAL DEFINITIONS
A functional description of each terminal can be found in the Functional Terminal Description section beginning on page 14.
Die Terminal Terminal Name
Formal Name
Definition
MCU
MCU
MCU
MCU
1 PTB7/AD7/TBCH1
2 PTB6/AD6/TBCH0
6 PTB5/AD5
7 PTB4/AD4
8 PTB3/AD3
11 PTB1/AD1
Port B I/Os
These terminals are special-function, bidirectional I/O port terminals
that are shared with other functional modules in the MCU.
3 PTC4/OSC1
4 PTC3/OSC2
5 PTC2/MCLK
Port C I/Os
These terminals are special-function, bidirectional I/O port terminals
that are shared with other functional modules in the MCU.
9 IRQ External Interrupt This terminal is an asynchronous external interrupt input terminal.
Input
10
RST
External Reset
This terminal is bidirectional, allowing a reset of the entire system. It
is driven low when any internal reset source is asserted.
MCU
12
13
14, 21, 22,
28, 33, 35,
36, 37, 39
PTD0/TACH0/BEMF
PTD1/TACH1
NC
Port D I/Os
No Connect
These terminals are special-function, bidirectional I/O port terminals
that are shared with other functional modules in the MCU.
Not connected.
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E626
3