參數(shù)資料
型號: SST89E52RC-33-C-NJE
廠商: Microchip Technology
文件頁數(shù): 38/71頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 9KB FLASH 44PLCC
標(biāo)準(zhǔn)包裝: 26
系列: FlashFlex®
核心處理器: 8051
芯體尺寸: 8-位
速度: 33MHz
連通性: EBI/EMI,UART/USART
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25088A
10/11
43
FlashFlex MCU
SST89E52RC / SST89E54RC
Data Sheet
A Microchip Technology Company
Feed Sequence
In Watchdog mode (WDRE=1), a feed sequence is needed to write into the WDTC register.
The correct feed sequence is:
1.
write FDH to SFIS1,
2.
write 2AH to SFIS0, then
3.
write to the WDTC register
An incorrect feed sequence will cause an immediate reset in Watchdog mode.
In Timer mode, the WDTC and WDTD can be written at any time. A feed sequence is not required.
Power Saving Considerations for Using the Watchdog Timer
During Idle mode, the Watchdog timer will remain active. The device should be awakened and the
Watchdog timer refreshed periodically before expiration. During Power-down mode, the Watchdog
timer is stopped. When the Watchdog timer is used as a pure timer, users can turn off the clock to save
power. See “Power Management Control Register (PMC)” on page 22.
Figure 10:Block Diagram of Programmable Watchdog Timer
1259 F18.0
WDT Upper Byte
WDT Reset
Internal Reset
344064
clks
Counter
CLK (XTAL1)
Ext. RST
WDTC
WDTD
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參數(shù)描述
SST89E52RC-33-C-PIE 功能描述:8位微控制器 -MCU 8-Bit 8K+1K Flash 33MHz 3/16-Bit Timer RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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