參數(shù)資料
型號: P89V662FA,512
廠商: NXP Semiconductors
文件頁數(shù): 38/90頁
文件大小: 0K
描述: IC 80C51 MCU FLASH 32K 44-PLCC
產(chǎn)品培訓(xùn)模塊: Migrating from 8/16-Bit MCUs to 32-Bit ARMs
標(biāo)準(zhǔn)包裝: 26
系列: 89V
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 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: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
產(chǎn)品目錄頁面: 706 (CN2011-ZH PDF)
其它名稱: 568-2434-5
935280831512
P89V662FA
P89V660_662_664
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 3.1 — 17 October 2011
43 of 90
NXP Semiconductors
P89V660/662/664
80C51 with 512 B/1 kB/2 kB RAM, dual I2C-bus, SPI
Table 31.
Timer 2 operating mode
RCLK+TCLK
CP/RL2
TR2
T2OE
Mode
0
1
0
16-bit auto reload
0
1
0
16-bit capture
0
1
Programmable Clock-Out
1
X
1
0
Baud rate generator
XX
0
Xoff
Table 32.
T2CON - Timer/Counter 2 control register (address C8H) bit allocation
Bit addressable; Reset value: 00H
Bit
7
6
5
4
3
2
1
0
Symbol
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2CP/RL2
Table 33.
T2CON - Timer/Counter 2 control register (address C8H) bit description
Bit
Symbol
Description
7
TF2
Timer 2 overflow flag set by a Timer 2 overflow and must be cleared by
software. TF2 will not be set when either RCLK or TCLK = 1 or when
Timer 2 is in Clock-out mode.
6
EXF2
Timer 2 external flag is set when Timer 2 is in capture, reload or baud
rate mode, EXEN2 = 1 and a negative transition on T2EX occurs. If
Timer 2 interrupt is enabled EXF2 = 1 causes the CPU to vector to the
Timer 2 interrupt routine. EXF2 must be cleared by software.
5
RCLK
Receive clock flag. When set, causes the UART to use Timer 2
overflow pulses for its receive clock in modes 1 and 3. RCLK = 0
causes Timer 1 overflow to be used for the receive clock.
4
TCLK
Transmit clock flag. When set, causes the UART to use Timer 2
overflow pulses for its transmit clock in modes 1 and 3. TCLK = 0
causes Timer 1 overflows to be used for the transmit clock.
3
EXEN2
Timer 2 external enable flag. When set, allows a capture or reload to
occur as a result of a negative transition on T2EX if Timer 2 is not
being used to clock the serial port. EXEN2 = 0 causes Timer 2 to
ignore events at T2EX.
2
TR2
Start/stop control for Timer 2. A logic ‘1’ enables the timer to run.
1C/T2
Timer or counter select. (Timer 2)
0 = internal timer (fosc /6)
1 = external event counter (falling edge triggered; external clock’s
maximum rate = fosc / 12.
0CP/RL2
Capture/Reload flag. When set, captures will occur on negative
transitions at T2EX if EXEN2 = 1. When cleared, auto-reloads will
occur either with Timer 2 overflows or negative transitions at T2EX
when EXEN2 = 1. When either RCLK = 1 or TCLK = 1, this bit is
ignored and the timer is forced to auto-reload on Timer 2 overflow.
Table 34.
T2MOD - Timer 2 mode control register (address C9H) bit allocation
Not bit addressable; Reset value: XX00 0000B
Bit
7
6
5
4
3
2
1
0
Symbol
-
---
T2OE
DCEN
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