參數(shù)資料
型號(hào): SST89V58RD2-33-I-NJE
廠商: Microchip Technology
文件頁數(shù): 54/92頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 40KB FLASH 44PLCC
標(biāo)準(zhǔn)包裝: 27
系列: FlashFlex®
核心處理器: 8051
芯體尺寸: 8-位
速度: 33MHz
連通性: EBI/EMI,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,WDT
輸入/輸出數(shù): 36
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 8K x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25087A
10/11
58
FlashFlex MCU
SST89V54RD2/RD / SST89V58RD2/RD
Not Recommended for New Designs
A Microchip Technology Company
Capture Mode
Capture mode is used to capture the PCA timer/counter value into a module’s capture registers
(CCAPnH and CCAPnL). The capture will occur on a positive edge, negative edge, or both on the cor-
responding module’s pin. To use one of the PCA modules in the capture mode, either one or both the
CCAPM bits CAPN and CAPP for that module must be set. When a valid transition occurs on the CEX
pin corresponding to the module used, the PCA hardware loads the 16-bit value of the PCA counter
register (CH and CL) into the module’s capture registers (CCAPnL and CCAPnH). If the CCFn bit for
the module in the CCON SFR and the ECCFn bit in the CCAPMn SFR are set, then an interrupt will be
generated. In the interrupt service routine, the 16-bit capture value must be saved in RAM before the
next event capture occurs. If a subsequent capture occurred, the original capture values would be lost.
After flag event flag has been set by hardware, the user must clear the flag in software. (See Figure 25)
Figure 25:PCA Capture Mode
1255 F24.0
CF
CR
CCF4
CCF3
CCF2
CCF1
CCF0
ECOMn CAPPn CAPNn
MATn
TOGn
PWMn ECCFn
CCON
CCAPMn
n=0 to 4
PCA Interrupt
CH
CL
CCAPnH
CCAPnL
PCA Timer/Counter
Capture
CEXn
00
0
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