參數(shù)資料
型號(hào)： P89V51RB2BBC,557
廠商： NXP Semiconductors
文件頁數(shù)： 24/80頁
文件大?。?/td> 0K
描述： IC 80C51 MCU 1024 RAM 44TQFP
產(chǎn)品培訓(xùn)模塊： Migrating from 8/16-Bit MCUs to 32-Bit ARMs
標(biāo)準(zhǔn)包裝： 800
系列： 89V
核心處理器： 8051
芯體尺寸： 8-位
速度： 40MHz
連通性： SPI，UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲(chǔ)器容量： 16KB（16K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： 0°C ~ 70°C
封裝/外殼： 44-TQFP
包裝： 托盤
配用： 622-1017-ND - BOARD 44-ZIF PLCC SOCKET
其它名稱： 935277723557
P89V51RB2BBC
P89V51RB2BBC-ND
P89V51RB2_RC2_RD2_5
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 12 November 2009
30 of 80
NXP Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
6.4.3 Mode 2
Mode 2 congures the Timer register as an 8-bit Counter (TLn) with automatic reload, as
shown in Figure 10. Overow 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.
6.4.4 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
TLn
(8-bits)
THn
(8-bits)
TFn
control
overflow
reload
interrupt
C/T = 0
C/T = 1
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參數(shù)描述
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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
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P89V51RB2FN 制造商:NXP Semiconductors 功能描述:IC MCU 8BIT 80C51 16K FLASH DIP40 制造商:NXP Semiconductors 功能描述:IC, MCU 8BIT 80C51 16K FLASH, DIP40
P89V51RB2FN,112 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
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