參數(shù)資料
型號: SST89V54RD2-33-C-NJE
廠商: Microchip Technology
文件頁數(shù): 33/92頁
文件大小: 0K
描述: IC MCU 8BIT 24KB 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,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 36
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: 44-LCC
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25087A
10/11
39
FlashFlex MCU
SST89V54RD2/RD / SST89V58RD2/RD
Not Recommended for New Designs
A Microchip Technology Company
Byte-Verify
The Byte-Verify command allows the user to verify that the device has correctly performed an Erase or
Program command. Byte-Verify command returns the data byte in SFDT if the command is successful.
The user is required to check that the previous flash operation has fully completed before issuing a
Byte-Verify. Byte-Verify command execution time is short enough that there is no need to poll for com-
mand completion and no interrupt is generated.
Figure 13:Byte-Verify
Prog-SB3, Prog-SB2, Prog-SB1
Prog-SB3, Prog-SB2, Prog-SB1 commands are used to program the security bits (see Table 24). Com-
pletion of any of these commands, the security options will be updated immediately.
Security bits previously in un-programmed state can be programmed by these commands. Prog-SB3,
Prog-SB2 and Prog-SB1 commands should only reside in Block 1 or external code memory.
Figure 14:Prog-SB3, Prog-SB2, Prog-SB1
MOV SFCM, #0CH
SFDT register
contains data
Program byte address
MOV SFAH, #byte_addressH
MOV SFAL, #byte_addressL
1255 F12.0
IAP Enable
ORL SFCF, #40H
Set-Up
MOV SFDT, #0AAH
OR
INT1# Interrupt
indicates completion
Polling SFST[2]
indicates completion
Program SB2
MOV SFCM, #03H
or
MOV SFCM, #83H
Program SB1
MOV SFCM, #0FH
or
MOV SFCM, #8FH
Program SB3
MOV SFCM, #05H
or
MOV SFCM, #85H
1255 F13.0
IAP Enable
ORL SFCF, #40H
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