mc68hc05pv8a Freescale Semiconductor, Inc, mc68hc05pv8a Datasheet - Page 164

• Manufacturer Part Number: mc68hc05pv8a
• Description: Mc68hc05pv8a Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Technical Data
14.3 Programming Register
Technical Data
Three bits of the program EEPROM programming register have been
provided in order to control the EEPROM operations.
RCON – RC Oscillator On
BULK – Bulk Erase Enable
ERAB – Write/Erase Mode Selection
LATB – Programming Latch Enable
$000D
Reset:
Read:
Write:
This bit determines the state of the RC oscillator. This oscillator
should be switched on when the device is operated below 1MHz bus
clock. On higher bus speeds, this bit can be switched off to reduce
power consumption
This bit determines the selection of 4-byte or bulk erase mode. For
programming the array, this bit must be cleared.
The status of this bit is latched on the first store to EEPROM following
the clearing of the LATB bit.
When cleared, this bit allows data and address to be latched into the
corresponding EEPROM flip-flops during the first store access to the
same EEPROM address. Any subsequent EEPROM store instruction
modifies the data register defined by address bits 0 and 1. For normal
access to the EEPROM, this bit must be set in order to force the
EEPROM address latch to the transparent mode. This bit also
Freescale Semiconductor, Inc.
Figure 14-1 Program EEPROM Control Register (PEECR)
For More Information On This Product,
1 = RC oscillator switched on
0 = RC oscillator switched off
1 = Bulk erase mode selected
0 = 4-byte erase mode selected
1 = EEPROM write mode
0 = EEPROM erase mode
Bit 7
–
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Program EEPROM
6
–
5
–
RCON
4
1
BULK
3
0
MC68HC(8)05PV8/A — Rev. 1.9
ERAB
2
1
LATB
1
1
PGMB
Bit 0
1