參數(shù)資料
型號: AT90S8515-8JC
廠商: Atmel
文件頁數(shù): 93/112頁
文件大?。?/td> 0K
描述: IC MCU 8K FLSH 8MHZ 44PLCC
標(biāo)準(zhǔn)包裝: 27
系列: AVR® 90S
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 8KB(4K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 512 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
81
AT90S8515
0841G–09/01
Chip Erase
The Chip Erase command will erase the Flash and EEPROM memories and the Lock
bits. The Lock bits are not reset until the Flash and EEPROM have been completely
erased. The Fuse bits are not changed. Chip Erase must be performed before the Flash
or EEPROM is reprogrammed.
Load Command “Chip Erase”
1.
Set XA1, XA0 to “10”. This enables command loading.
2.
Set BS to “0”.
3.
Set DATA to “1000 0000”. This is the command for Chip Erase.
4.
Give XTAL1 a positive pulse. This loads the command.
5.
Give WR a t
WLWH_CE-wide negative pulse to execute Chip Erase. See Table 30
WLWH_CE value. Chip Erase does not generate any activity on the
RDY/BSY pin.
Programming the Flash
A: Load Command “Write Flash”
1.
Set XA1, XA0 to “10”. This enables command loading.
2.
Set BS to “0”.
3.
Set DATA to “0001 0000”. This is the command for Write Flash.
4.
Give XTAL1 a positive pulse. This loads the command.
B: Load Address High Byte
1.
Set XA1, XA0 to “00”. This enables address loading.
2.
Set BS to “1”. This selects high byte.
3.
Set DATA = Address high byte ($00 - $0F).
4.
Give XTAL1 a positive pulse. This loads the address high byte.
C: Load Address Low Byte
1.
Set XA1, XA0 to “00”. This enables address loading.
2.
Set BS to “0”. This selects low byte.
3.
Set DATA = Address low byte ($00 - $FF).
4.
Give XTAL1 a positive pulse. This loads the address low byte.
D: Load Data Low Byte
1.
Set XA1, XA0 to “01”. This enables data loading.
2.
Set DATA = Data low byte ($00 - $FF).
3.
Give XTAL1 a positive pulse. This loads the data low byte.
E: Write Data Low Byte
1.
Set BS to “0”. This selects low data.
2.
Give WR a negative pulse. This starts programming of the data byte. RDY/BSY
goes low.
3.
Wait until RDY/BSY goes high to program the next byte.
(See Figure 61 for signal waveforms.)
F: Load Data High Byte
1.
Set XA1, XA0 to “01”. This enables data loading.
2.
Set DATA = Data high byte ($00 - $FF).
3.
Give XTAL1 a positive pulse. This loads the data high byte.
G: Write Data High Byte
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