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P89V51RB2/RC2/RD2
8-bit 80C51 5 V low power 16/32/64 kB flash microcontroller
with 1 kB RAM
Rev. 05 — 12 November 2009
Product data sheet
1. General description
The P89V51RB2/RC2/RD2 are 80C51 microcontrollers with 16/32/64 kB flash and
1024 B of data RAM.
A key feature of the P89V51RB2/RC2/RD2 is its X2 mode option. The design engineer
can choose to run the application with the conventional 80C51 clock rate (12 clocks per
machine cycle) or select the X2 mode (six clocks per machine cycle) to achieve twice the
throughput at the same clock frequency. Another way to benefit from this feature is to keep
the same performance by reducing the clock frequency by half, thus dramatically reducing
the EMI.
The flash program memory supports both parallel programming and in serial ISP. Parallel
programming mode offers gang-programming at high speed, reducing programming costs
and time to market. ISP allows a device to be reprogrammed in the end product under
software control. The capability to field/update the application firmware makes a wide
range of applications possible.
The P89V51RB2/RC2/RD2 is also capable of IAP, allowing the flash program memory to
be reconfigured even while the application is running.
2. Features
I 80C51 CPU
I 5 V operating voltage from 0 MHz to 40 MHz
I 16/32/64 kB of on-chip flash user code memory with ISP and IAP
I Supports 12-clock (default) or 6-clock mode selection via software or ISP
I SPI and enhanced UART
I PCA with PWM and capture/compare functions
I Four 8-bit I/O ports with three high-current port 1 pins (16 mA each)
I Three 16-bit timers/counters
I Programmable watchdog timer
I Eight interrupt sources with four priority levels
I Second DPTR register
I Low EMI mode (ALE inhibit)
I TTL- and CMOS-compatible logic levels
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P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
I Brownout detection
I Low power modes
N Power-down mode with external interrupt wake-up
N Idle mode
I DIP40, PLCC44 and TQFP44 packages
3. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
P89V51RB2FA
PLCC44 plastic leaded chip carrier; 44 leads
P89V51RB2FN
DIP40
plastic dual in-line package; 40 leads (600 mil)
P89V51RB2BBC TQFP44 plastic thin quad flat package; 44 leads; body 10 × 10 × 1.0 mm
P89V51RC2FA
PLCC44 plastic leaded chip carrier; 44 leads
P89V51RC2FBC TQFP44 plastic thin quad flat package; 44 leads; body 10 × 10 × 1.0 mm
P89V51RC2FN DIP40
plastic dual in-line package; 40 leads (600 mil)
P89V51RD2FA
PLCC44 plastic leaded chip carrier; 44 leads
P89V51RD2FBC TQFP44 plastic thin quad flat package; 44 leads; body 10 × 10 × 1.0 mm
P89V51RD2BN DIP40
plastic dual in-line package; 40 leads (600 mil)
P89V51RD2FN DIP40
plastic dual in-line package; 40 leads (600 mil)
Version
SOT187-2
SOT129-1
SOT376-1
SOT187-2
SOT376-1
SOT129-1
SOT187-2
SOT376-1
SOT129-1
SOT129-1
3.1 Ordering options
Table 2. Ordering options
Type number
Flash memory
P89V51RB2FA
16 kB
P89V51RB2FN
16 kB
P89V51RB2BBC
16 kB
P89V51RC2FA
32 kB
P89V51RC2FBC
32 kB
P89V51RC2FN
32 kB
P89V51RD2FA
64 kB
P89V51RD2FBC
64 kB
P89V51RD2BN
64 kB
P89V51RD2FN
64 kB
Temperature range
40 °C to +85 °C
40 °C to +85 °C
0 °C to +70 °C
40 °C to +85 °C
40 °C to +85 °C
40 °C to +85 °C
40 °C to +85 °C
40 °C to +85 °C
0 °C to +70 °C
40 °C to +85 °C
Frequency
0 MHz to 40 MHz
P89V51RB2_RC2_RD2_5
Product data sheet
Rev. 05 — 12 November 2009
© NXP B.V. 2009. All rights reserved.
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4. Block diagram
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
P3[7:0]
P89V51RB2/RC2/RD2
HIGH PERFORMANCE
80C51 CPU
16/32/64 kB
CODE FLASH
1 kB
DATA RAM
internal
bus
PORT 3
P2[7:0]
PORT 2
P1[7:0]
PORT 1
P0[7:0]
CRYSTAL
OR
RESONATOR
XTAL1
XTAL2
PORT 0
OSCILLATOR
Fig 1. Block diagram
UART
TIMER 0
TIMER 1
TIMER 2
SPI
PCA
PROGRAMMABLE
COUNTER ARRAY
WATCHDOG TIMER
TXD
RXD
T0
T1
T2
T2EX
SPICLK
MOSI
MISO
SS
CEX[4:0]
002aac772
P89V51RB2_RC2_RD2_5
Product data sheet
Rev. 05 — 12 November 2009
© NXP B.V. 2009. All rights reserved.
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5. Pinning information
5.1 Pinning
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
P1.5/MOSI/CEX2 7
P1.6/MISO/CEX3 8
P1.7/SPICLK/CEX4 9
RST 10
P3.0/RXD 11
n.c. 12
P3.1/TXD 13
P3.2/INT0 14
P3.3/INT1 15
P3.4/T0 16
P3.5/T1 17
P89V51RB2FA
P89V51RC2FA
P89V51RD2FA
Fig 2. PLCC44 pin configuration
39 P0.4/AD4
38 P0.5/AD5
37 P0.6/AD6
36 P0.7/AD7
35 EA
34 n.c.
33 ALE/PROG
32 PSEN
31 P2.7/A15
30 P2.6/A14
29 P2.5/A13
002aaa810
P89V51RB2_RC2_RD2_5
Product data sheet
Rev. 05 — 12 November 2009
© NXP B.V. 2009. All rights reserved.
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P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
P1.0/T2 1
P1.1/T2EX 2
P1.2/ECI 3
P1.3/CEX0 4
P1.4/SS/CEX1 5
P1.5/MOSI/CEX2 6
P1.6/MISO/CEX3 7
P1.7/SPICLK/CEX4 8
RST 9
P3.0/RXD 10
P3.1/TXD 11
P3.2/INT0 12
P3.3/INT1 13
P3.4/T0 14
P3.5/T1 15
P3.6/WR 16
P3.7/RD 17
XTAL2 18
XTAL1 19
VSS 20
P89V51RB2FN
P89V51RC2FN
P89V51RD2BN
P89V51RD2FN
40 VDD
39 P0.0/AD0
38 P0.1/AD1
37 P0.2/AD2
36 P0.3/AD3
35 P0.4/AD4
34 P0.5/AD5
33 P0.6/AD6
32 P0.7/AD7
31 EA
30 ALE/PROG
29 PSEN
28 P2.7/A15
27 P2.6/A14
26 P2.5/A13
25 P2.4/A12
24 P2.3/A11
23 P2.2/A10
22 P2.1/A9
21 P2.0/A8
002aaa811
Fig 3. DIP40 pin configuration
P1.5/MOSI/CEX2 1
P1.6/MISO/CEX3 2
P1.7/SPICLK/CEX4 3
RST 4
P3.0/RXD 5
n.c. 6
P3.1/TXD 7
P3.2/INT0 8
P3.3/INT1 9
P3.4/T0 10
P3.5/T1 11
P89V51RB2BBC
P89V51RC2FBC
P89V51RD2FBC
33 P0.4/AD4
32 P0.5/AD5
31 P0.6/AD6
30 P0.7/AD7
29 EA
28 n.c.
27 ALE/PROG
26 PSEN
25 P2.7/A15
24 P2.6/A14
23 P2.5/A13
002aaa812
Fig 4. TQFP44 pin configuration
P89V51RB2_RC2_RD2_5
Product data sheet
Rev. 05 — 12 November 2009
© NXP B.V. 2009. All rights reserved.
5 of 80
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