mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 108

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

EEPROM-2
7.4.7 EEPROM Control Register
Technical Data
NOTE:
Address:
In addition to the disabling of the program and erase operations on
memory locations $06F0–$06FF, the enabling of the protect option has
the following effects:
Once armed, the security option is permanently enabled. As a
consequence, all functions in the EENVR will remain in the state they
were in immediately before the security was enabled.
This read/write register controls programming/erasing of the array.
EEBCLK — EEPROM Bus Clock Enable Bit
Reset:
Read:
Write:
•
•
•
•
•
This read/write bit determines which clock will be used to drive the
internal charge pump for programming/erasing. Reset clears this bit.
Freescale Semiconductor, Inc.
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1 = Bus clock drives charge pump.
0 = Internal RC oscillator drives charge pump.
Bulk and block erase modes are disabled.
Programming and erasing of the EENVR are disabled.
Unsecure locations ($0600–$06EF) can be erased using the
single byte erase function as normal.
Secured locations can be read as normal.
Writing to a secured location no longer qualifies as a valid
EEPROM write as detailed in
note b and
EEBCLK
$FE19
Bit 7
Figure 7-1. EEPROM-2 Control Register (EECR2)
0
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= Unimplemented
7.4.2 EEPROM Erasing
6
0
0
EEPROM-2
EEOFF
5
0
EERAS1
4
0
7.4.1 EEPROM Programming
EERAS0
3
0
note a.
MC68HC908AS60 — Rev. 1.0
EELAT
2
0
1
0
0
EEPGM
Bit 0
0