參數(shù)資料
型號(hào): SST89C58RC-40-I-TQJE
廠商: Microchip Technology
文件頁(yè)數(shù): 16/88頁(yè)
文件大?。?/td> 0K
描述: IC MCU 8BIT FLASH 40TQFP
標(biāo)準(zhǔn)包裝: 160
系列: FlashFlex®
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: EBI/EMI,I²C,SMBus,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,WDT
輸入/輸出數(shù): 32
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> 2K x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-TQFP
包裝: 托盤
2011 Silicon Storage Technology, Inc.
DS25100A
12/11
23
FlashFlex MCU
SST89C58RC
Data Sheet
A Microchip Technology Company
Symbol
Function
WDTON
Watchdog timer start control bit (Used in Watchdog mode)
0: Watchdog timer can be started or stopped freely during Watchdog mode.
1: Start Watchdog timer; bit cannot be cleared by software.
WDFE
Watchdog feed sequence error flag
0: Watchdog feed sequence error has not occurred.
1: Due to an incorrect feed sequence before writing to WDTC in Watchdog mode, the
hardware entered Watchdog reset and set this flag to ‘1’. This is for software to detect
whether the Watchdog reset was caused by timer expiration or an incorrect feed
sequence.
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.
Watchdog Timer Control Register (WDTC)
Location
7
6
5
4
3
2
1
0
Reset Value
C0H
-
WDTON
WDFE
-
WDRE
WDT
SWDT
x00x0000b
Watchdog Timer Data/Reload Register (WDTD)
Location
7
6543210
Reset Value
85H
Watchdog Timer Data/Reload
00H
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