参数资料
型号: T89C51AC2-SLSIM
厂商: Atmel
文件页数: 102/121页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
标准包装: 27
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
81
A/T89C51AC2
4127H–8051–02/08
PCA Registers
Table 55. CMOD Register
CMOD (S:D9h)
PCA Counter Mode Register
Reset Value = 00XX X000b
7
6
5
4
3
2
1
0
CIDL
WDTE
-
CPS1
CPS0
ECF
Bit
Number
Bit
Mnemonic Description
7
CIDL
PCA Counter Idle Control bit
Clear to let the PCA run during Idle mode.
Set to stop the PCA when Idle mode is invoked.
6
WDTE
Watchdog Timer Enable
Clear to disable Watchdog Timer function on PCA Module 4,
Set to enable it.
5
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
2-1
CPS1:0
EWC Count Pulse Select bits
CPS1 CPS0
Clock source
0
Internal Clock, FPca/6
0
1
Internal Clock, FPca/2
1
0
Timer 0 overflow
1
External clock at ECI/P1.2 pin (Max. Rate = FPca/4)
0
ECF
Enable PCA Counter Overflow Interrupt bit
Clear to disable CF bit in CCON register to generate an interrupt.
Set to enable CF bit in CCON register to generate an interrupt.
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