MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 128
![no-image](/images/no-image-200.jpg)
MC68HC705V12CFN
Manufacturer Part Number
MC68HC705V12CFN
Description
The Motorola microcontroller
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC705V12CFN.pdf
(248 pages)
- Current page: 128 of 248
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EPROM and EEPROM
Advance Information
128
EELAT — EEPROM Programming Latch Bit
EERC — EEPROM RC Oscillator Control Bit
EEPGM — EEPROM Programming Power Enable Bit
In byte erase mode, only the selected byte is erased. In block mode,
a 64-byte block of EEPROM is erased. The EEPROM memory space
is divided into four 64-byte blocks ($0240–$027F, $0280–$02BF,
$02C0–$02FF, and $0300–$033F), and doing a block erase to any
address within a block will erase the entire block. In bulk erase mode,
the entire 256-byte EEPROM section is erased.
When set, EELAT configures the EEPROM address and data bus for
programming. When EELAT 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
EELAT 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.
When this bit is set, the EEPROM section uses the internal RC
oscillator instead of the CPU clock. After setting the EERC bit, delay
a time, t
readable and writable and should be set by the user when the internal
bus frequency falls below 1.5 MHz. Reset clears this 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 will enable pulsing of the programming
voltage to be controlled internally. This bit can be read at any time, but
can only be written to if EELAT = 1. If EELAT is not set, then EEPGM
cannot be set. Reset clears this bit.
RCON
EPROM and EEPROM
, to allow the RC oscillator to stabilize. This bit is
MC68HC705V12
MOTOROLA
—
Rev. 3.0
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