MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 74

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MC68HC708AS48

Manufacturer Part Number
MC68HC708AS48
Description
Advance Information
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
Electrically Erasable Programmable ROM
6.4.6 EEPROM Control Register
This read/write register controls programming/erasing of the array.
Address:
Read:
Write:
Reset:
EEBCLK — EEPROM Bus Clock Enable Bit
This read/write bit determines which clock will be used to drive the
internal charge pump for programming/erasing. Reset clears this bit.
NOTE:
Use the internal RC oscillator for applications in the 3 to 5 V range.
EEOFF — EEPROM Power Down Bit
This read/write bit disables the EEPROM module for lower power
consumption. Any attempts to access the array will give unpredictable
results. Reset clears this bit.
NOTE:
The EEPROM requires a recovery time, t
the EEOFF bit. Refer to
Advance Information
74
Electrically Erasable Programmable ROM (EEPROM)
$FE1D
Bit 7
6
5
4
0
EEBCLK
EEOFF
EERAS1
R
0
0
0
0
R
= Reserved
Figure 6-1. EEPROM Control Register (EECR)
1 = Bus clock drives charge pump.
0 = Internal RC oscillator drives charge pump.
1 = Disable EEPROM array
0 = Enable EEPROM array
21.6 Control Timing
3
2
1
Bit 0
0
EERAS0
EELAT
EEPGM
R
0
0
0
0
, to stabilize after clearing
EEOFF
for timing values.
MC68HC708AS48
Rev. 4.0
MOTOROLA

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