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參數(shù)資料
| 型號： | P89V51RB2BA |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| 中文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, MS-018, SOT-187-2, LCC-44 |
| 文件頁數(shù)： | 30/77頁 |
| 文件大?。?/td> | 350K |
| 代理商： | P89V51RB2BA |
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Philips Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 03 — 02 December 2004
30 of 77
9397 750 14341
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
7.3.3
Mode 2
Mode 2 configures the Timer register as an 8-bit Counter (TLn) with automatic reload,
as shown in
Figure 10
. Overflow from TLn not only sets TFn, but also reloads TLn
with the contents of THn, which must be preset by software. The reload leaves THn
unchanged. Mode 2 operation is the same for Timer 0 and Timer 1.
7.3.4
Mode 3
When timer 1 is in Mode 3 it is stopped (holds its count). The effect is the same as
setting TR1 = 0.
Timer 0 in Mode 3 establishes TL0 and TH0 as two separate 8-bit counters. The logic
for Mode 3 and Timer 0 is shown in
Figure 11
. TL0 uses the Timer 0 control bits:
T0C/T, T0GATE, TR0, INT0, and TF0. TH0 is locked into a timer function (counting
machine cycles) and takes over the use of TR1 and TF1 from Timer 1. Thus, TH0
now controls the ‘Timer 1’ interrupt.
Mode 3 is provided for applications that require an extra 8-bit timer. With Timer 0 in
Mode 3, the P89V51RB2/RC2/RD2 can look like it has an additional Timer.
Note:
When Timer 0 is in Mode 3, Timer 1 can be turned on and off by switching it
into and out of its own Mode 3. It can still be used by the serial port as a baud rate
generator, or in any application not requiring an interrupt.
Fig 9.
Timer/Counter 0 or 1 in Mode 1 (16-bit counter).
002aaa520
Osc/6
Tn pin
TRn
TnGate
INTn Pin
C/T = 0
C/T = 1
TLn
(8-bits)
THn
(8-bits)
TFn
control
overflow
interrupt
Fig 10. Timer/Counter 0 or 1 in Mode 2 (8-bit auto-reload).
002aaa521
Osc/6
Tn pin
TRn
TnGate
INTn Pin
C/T = 0
C/T = 1
TLn
(8-bits)
THn
(8-bits)
TFn
control
overflow
reload
interrupt
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89V51RB2BBC | 功能描述:8位微控制器 -MCU 16K/512 FL 12 CLK ISP/IAP COMM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P89V51RB2BBC,557 | 功能描述:8位微控制器 -MCU 16K/512 FL 12 CLK RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P89V51RB2FA | 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 16K FLASH PLCC44 |
| P89V51RB2FA,529 | 功能描述:8位微控制器 -MCU 80C51 16K FL / 512 R RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| P89V51RB2FA529 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 40MHZ LCC-44 |
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