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参数资料
| 型号： | P89V51RD2FN,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 21/80页 |
| 文件大小： | 0K |
| 描述： | IC 80C51 MCU FLASH 64K 40-DIP |
| 产品培训模块： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 标准包装： | 9 |
| 系列： | 89V |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 40MHz |
| 连通性： | SPI，UART/USART |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 32 |
| 程序存储器容量： | 64KB（64K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 包装： | 管件 |
| 产品目录页面： | 706 (CN2011-ZH PDF) |
| 配用： | 622-1017-ND - BOARD 44-ZIF PLCC SOCKET 622-1001-ND - USB IN-CIRCUIT PROG 80C51ISP |
| 其它名称： | 568-2431-5 935277948112 P89V51RD2FN |
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P89V51RB2_RC2_RD2_5
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 12 November 2009
28 of 80
NXP Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Table 14.
TMOD - Timer/counter mode control register (address 89H) bit allocation
Not bit addressable; Reset value: 0000 0000B; Reset source(s): any source
Bit
7
6
5
4
3
2
1
0
Symbol
T1GATE
T1C/T
T1M1
T1M0
T0GATE
T0C/T
T0M1
T0M0
Table 15.
TMOD - Timer/counter mode control register (address 89H) bit description
Bit
Symbol
Description
T1/T0
Bits controlling Timer1/Timer0
GATE
Gating control when set. Timer/counter ‘x’ is enabled only while ‘INTx’
pin is HIGH and ‘TRx’ control pin is set. When cleared, Timer ‘x’ is
enabled whenever ‘TRx’ control bit is set.
C/T
Gating Timer or Counter Selector cleared for Timer operation (input
from internal system clock.) Set for Counter operation (input from ‘Tx’
input pin).
Table 16.
TMOD - Timer/counter mode control register (address 89H) M1/M0 operating
mode
M1
M0
Operating mode
0
8048 timer ‘TLx’ serves as 5-bit prescaler
0
1
16-bit Timer/counter ‘THx’ and ‘TLx' are cascaded;
there is no prescaler.
1
0
2
8-bit auto-reload Timer/counter ‘THx’ holds a value
which is to be reloaded into ‘TLx’ each time it
overows.
1
3
(Timer 0) TL0 is an 8-bit Timer/counter controlled
by the standard Timer 0 control bits. TH0 is an 8-bit
timer only controlled by Timer 1 control bits.
1
3
(Timer 1) Timer/counter 1 stopped.
Table 17.
TCON - Timer/counter control register (address 88H) bit allocation
Bit addressable; Reset value: 0000 0000B; Reset source(s): any reset
Bit
7
6
5
4
3
2
1
0
Symbol
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
Table 18.
TCON - Timer/counter control register (address 88H) bit description
Bit
Symbol
Description
7
TF1
Timer 1 overow ag. Set by hardware on Timer/counter overow.
Cleared by hardware when the processor vectors to Timer 1 Interrupt
routine, or by software.
6
TR1
Timer 1 Run control bit. Set/cleared by software to turn Timer/counter
1 on/off.
5
TF0
Timer 0 overow ag. Set by hardware on Timer/counter overow.
Cleared by hardware when the processor vectors to Timer 0 Interrupt
routine, or by software.
4
TR0
Timer 0 Run control bit. Set/cleared by software to turn Timer/counter
0 on/off.
3
IE1
Interrupt 1 Edge ag. Set by hardware when external interrupt 1
edge/low level is detected. Cleared by hardware when the interrupt is
processed, or by software.
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