參數(shù)資料
型號： MC68HC805K3DW
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, EEPROM, 2 MHz, MICROCONTROLLER, PDSO16
封裝： SOIC-16
文件頁數(shù)： 103/119頁
文件大?。?/td> 496K
代理商： MC68HC805K3DW
General Release Specication
PEEPROM Registers
MC68HC805K3 — Rev. 1.0
84
Personality EEPROM
MOTOROLA
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
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 one, a logical zero 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
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 one, a logical one 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.
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