參數(shù)資料
型號(hào): MC68HC05P18AMP
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(yè)數(shù): 117/130頁(yè)
文件大?。?/td> 1310K
代理商: MC68HC05P18AMP
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EEPROM
EEPROM Programming Register
MC68HC05P18A
Technical Data
EEPROM
NON-DISCLOSURE
AGREEMENT
REQUIRED
In byte erase mode, only the selected byte is erased. In block mode,
a 32-byte block of EEPROM is erased. The EEPROM memory space
is divided into four 32-byte blocks ($140–$15F, $160–$17F,
$180–$19F, $1A0–$1BF), and doing a block erase to any address
within a block erases the entire block. In bulk erase mode, the entire
128-byte EEPROM section is erased.
LATCH — EEPROM Programming Latch Bit
When set, LATCH configures the EEPROM address and data bus for
programming. When LATCH is set, writes to the EEPROM array
cause the data bus and the address bus to be latched. This bit is
readable and writable, but reads from the array are inhibited if the
LATCH bit is set and a write to the EEPROM space has taken place.
When clear, address and data buses are configured for normal
operation. Reset clears this bit.
EERC — EEPROM RC Oscillator Control Bit
When this bit is set, the EEPROM section uses the internal RC
oscillator instead of the CPU clock. The RC oscillator is shared with
the analog-to-digital (A/D) converter, so this bit should be set by the
user when the internal bus frequency is below 1.5 MHz to guarantee
reliable operation of the EEPROM or A/D converter. After setting the
EERC bit, delay a time, tRCON, to allow the RC oscillator to stabilize.
This bit is readable and writable. The EERC bit is cleared by reset.
The RC oscillator is disabled while the MCU is in stop mode.
EEPGM — EEPROM Programming Power Enable Bit
EEPGM must be written to enable (or disable) the EEPGM function.
When set, EEPGM turns on the charge pump and enables the
programming (or erasing) power to the EEPROM array. When clear,
this power is switched off. This enables pulsing of the programming
voltage to be controlled internally. This bit can be read at any time, but
can only be written to if LATCH = 1. If LATCH is not set, EEPGM
cannot be set. LATCH and EEPGM cannot both be set with one write
if LATCH is cleared. EEPGM is cleared automatically when LATCH is
cleared. Reset clears this bit.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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