参数资料
型号: SST89E554A-40-I-TQJ
厂商: SILICON STORAGE TECHNOLOGY INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44
封装: MS-026ACB, TQFP-44
文件页数: 26/87页
文件大小: 996K
代理商: SST89E554A-40-I-TQJ
32
Preliminary Specifications
FlashFlex51 MCU
SST89E554A / SST89V554A
2003 Silicon Storage Technology, Inc.
S71228-00-000
6/03
Symbol
Function
EX2
External Interrupt 2
Enable bit if set
IE2
Interrupt Enable
If IT2=1, IE2 is set/cleared automatically by hardware when interrupt is detected/
serviced.
IT2
External Interrupt 2 is falling-edge/low-level triggered when this bit is cleared by
software.
EX3
External Interrupt 3
Enable bit if set
IE3
Interrupt Enable
If IT3=1, IE3 is set/cleared automatically by hardware when interrupt is detected/
serviced.
IT3
External Interrupt3 is falling-edge/low-level triggered when this bit is cleared by
software.
External Interrupt Control (XICON)
Location
76543210
Reset Value
AEH
0
EX3
IE3
IT3
0
EX2
IE2
IT2
00H
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