參數資料
型號: SST89V54RD-33-C-PIE
廠商: Microchip Technology
文件頁數: 18/92頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 24KB FLASH 40PDIP
標準包裝: 9
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
外圍設備: 欠壓檢測/復位,POR,WDT
輸入/輸出數: 32
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: 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: 0°C ~ 70°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25087A
10/11
25
FlashFlex MCU
SST89V54RD2/RD / SST89V58RD2/RD
Not Recommended for New Designs
A Microchip Technology Company
Symbol
Function
WDOUT
Watchdog output enable.
0: Watchdog reset will not be exported on Reset pin.
1: Watchdog reset if enabled by WDRE, will assert Reset pin for 32 clocks.
WDRE
Watchdog timer reset enable.
0: Disable watchdog timer reset.
1: Enable watchdog timer reset.
WDTS
Watchdog timer reset flag.
0: External hardware reset or power-on reset clears the flag.
Flag can also be cleared by writing a 1.
Flag survives if chip reset happened because of watchdog timer overflow.
1: Hardware sets the flag on watchdog overflow.
WDT
Watchdog timer refresh.
0: Hardware resets the bit when refresh is done.
1: Software sets the bit to force a watchdog timer refresh.
SWDT
Start watchdog timer.
0: Stop WDT.
1: Start WDT.
Symbol
Function
WDTD
Initial/Reload value in Watchdog Timer. New value won’t be effective until WDT is set.
Watchdog Timer Control Register (WDTC)
Location
76543210
Reset
Value
C0H
-
WDOUT
WDRE
WDTS
WDT
SWDT
xxx00000b
Watchdog Timer Data/Reload Register (WDTD)
Location
76543210
Reset
Value
85H
Watchdog Timer Data/Reload
00H
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參數描述
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