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參數(shù)資料
| 型號(hào)： | MC68HC05K3CSDR2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | SSOP-20 |
| 文件頁(yè)數(shù)： | 116/132頁(yè) |
| 文件大?。?/td> | 1188K |
| 代理商： | MC68HC05K3CSDR2 |
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Technical Data
MC68HC05K3 — Revision 4.0
84
Personality EEPROM (PEEPROM)
MOTOROLA
Personality EEPROM (PEEPROM)
The charge pump must always be used to program or erase bits in the
personality EEPROM. The CPEN bit is cleared when the device is in
reset.
NOTE:
Setting the CPEN bit can activate the charge pump. However, all the
PEPGM, PEBYTE, PEBULK, and CPEN bits must be cleared to
de-activate the charge pump. If the charge pump is left running, the
overall device IDD current increases.
PEBYTE — PEEPROM Byte Erase Bit
The PEBYTE bit is a read/write bit to control the switches that apply
the internally provided charge pump programming voltage to a row in
the PEEPROM array that is to be erased. When the PEBYTE bit is set
to a logical 1, a logical 0 is stored to all bits in the same row of the
PEEPROM array, as specified by the upper four bits of the 7-bit
address in the PEBSR.
The PEBYTE bit should only be set if the PEPGM and PEBULK bits
are cleared. If both the PEBYTE and PEBULK bits are set, the
PEEPROM is bulk erased. The PEBYTE bit is cleared when the
device is reset.
PEPGM — PEEPROM Program Control Bit
The PEPGM bit is a read/write bit to control the switches that apply
the internally provided charge pump programming voltage to the
device in the PEEPROM array that is to be programmed. When the
PEPGM bit is set to a logical 1, a logical 1 is stored to the PEEPROM
array element specified by the address in the PEBSR. Since the state
of the PEPGM bit determines the state of the programmed bit in the
PEEPROM array, the PEPGM bit is similar to a DATA IN bit.
The PEPGM bit should be set only if the PEBYTE and PEBULK bits
are cleared. The PEPGM bit is cleared when the device is reset.
NOTE:
Only one of the PEPGM, PEBYTE, or PEBULK bits should be set at any
one time.
Always clear the PEPGM bit before altering the addressing bits in the
PEBSR. Otherwise, intermediate locations may be affected if the
programming voltage is present.
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