参数资料
型号: AT89C51IC2-RLRUM
厂商: Atmel
文件页数: 74/140页
文件大小: 0K
描述: IC 8051 MCU 32K FLASH 44-VQFP
产品培训模块: MCU Product Line Introduction
标准包装: 1,500
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: I²C,SPI,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
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LQFP
包装: 剪切带 (CT)
其它名称: AT89C51IC2-RLRUMCT
39
AT89C51IC2
4301D–8051–02/08
Figure 12. PCA Interrupt System
PCA Modules: each one of the five compare/capture modules has six possible func-
tions. It can perform:
16-bit Capture, positive-edge triggered
16-bit Capture, negative-edge triggered
16-bit Capture, both positive and negative-edge triggered
16-bit Software Timer
16-bit High Speed Output
8-bit Pulse Width Modulator
In addition, module 4 can be used as a Watchdog Timer.
Each module in the PCA has a special function register associated with it. These regis-
ters are: CCAPM0 for module 0, CCAPM1 for module 1, etc. (See Table 28). The
registers contain the bits that control the mode that each module will operate in.
The ECCF bit (CCAPMn.0 where n=0, 1, 2, 3, or 4 depending on the module)
enables the CCF flag in the CCON SFR to generate an interrupt when a match or
compare occurs in the associated module.
PWM (CCAPMn.1) enables the pulse width modulation mode.
The TOG bit (CCAPMn.2) when set causes the CEX output associated with the
module to toggle when there is a match between the PCA counter and the module's
capture/compare register.
The match bit MAT (CCAPMn.3) when set will cause the CCFn bit in the CCON
register to be set when there is a match between the PCA counter and the module's
capture/compare register.
The next two bits CAPN (CCAPMn.4) and CAPP (CCAPMn.5) determine the edge
that a capture input will be active on. The CAPN bit enables the negative edge, and
the CAPP bit enables the positive edge. If both bits are set both edges will be
enabled and a capture will occur for either transition.
The last bit in the register ECOM (CCAPMn.6) when set enables the comparator
function.
CF
CR
CCON
0xD8
CCF4 CCF3 CCF2 CCF1 CCF0
Module 4
Module 3
Module 2
Module 1
Module 0
ECF
PCA Timer/Counter
ECCFn CCAPMn.0
CMOD.0
IEN0.6
IEN0.7
To Interrupt
priority decoder
EC
EA
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