MC68HC05PV8 Datasheet, PDF (164/196 Pages) Freescale Semiconductor, Inc – Techinal Data - rev 1.9

Technical Data
Freescale Semiconductor, Inc.
14.3 Programming Register
Three bits of the program EEPROM programming register have been
provided in order to control the EEPROM operations.
$000D Bit 7
6
5
4
3
2
1
Bit 0
Read:
Write:
RCON BULK ERAB LATB PGMB
Reset: –
–
–
1
0
1
1
1
Figure 14-1 Program EEPROM Control Register (PEECR)
RCON – RC Oscillator On
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
1 = RC oscillator switched on
0 = RC oscillator switched off
BULK – Bulk Erase Enable
This bit determines the selection of 4-byte or bulk erase mode. For
programming the array, this bit must be cleared.
1 = Bulk erase mode selected
0 = 4-byte erase mode selected
ERAB – Write/Erase Mode Selection
The status of this bit is latched on the first store to EEPROM following
the clearing of the LATB bit.
1 = EEPROM write mode
0 = EEPROM erase mode
LATB – Programming Latch Enable
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
Technical Data
MC68HC(8)05PV8/A — Rev. 1.9
Program EEPROM
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