參數(shù)資料
型號(hào): MC68HC05P18ACP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 118/130頁
文件大?。?/td> 1310K
代理商: MC68HC05P18ACP
NON-DISCLOSURE
AGREEMENT
REQUIRED
EEPROM
Technical Data
MC68HC05P18A
EEPROM
10.4 Programming/Erasing Procedures
To program a byte of EEPROM:
1. Set EELAT = CPEN = 1.
2. Set ER1 = ER0 = 0.
3. Write data to the desired address.
4. Set EEPGM for a time, t
EEPGM.
Any bit should be erased before it is programmed. However, if
write/erase cycling is a concern, a procedure can be followed to
minimize the cycling of each bit in each EEPROM byte.
Here is the procedure:
If PB EB = 0 — Program the new data over the existing data
without erasing it first.
If PB EB
≠ 0 — Erase byte before programming.
Where:
PB = Byte data to be programmed
EB = Existing EEPROM byte data
To erase a byte of EEPROM:
1. Set LATCH = 1, CPEN = 1, ER1 = 0, and ER0 = 1.
2. Write to the address to be erased.
3. Set EEPGM for a time, t
EBYT.
To erase a block of EEPROM:
1. Set LATCH = 1, CPEN = 1, ER1 = 1, and ER0 = 0.
2. Write to any address in the block.
3. Set EEPGM for a time, t
EBLOCK.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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