MC68HC08AZ32A Datasheet, PDF (74/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

EEPROM
Freescale Semiconductor, Inc.
5.6.5 EEPROM Timebase Divider Non-Volatile Register
The 16-bit EEPROM timebase divider non-volatile register consists of
two 8-bit registers: EEDIVHNVR and EEDIVLNVR. The contents of
these two registers are respectively loaded into the EEPROM timebase
divider registers, EEDIVH and EEDIVL, after a reset.
These two registers are erased and programmed in the same way as an
EEPROM byte.
Address: $FE10
Bit 7
6
5
4
3
2
1
Bit 0
Read:
EEDIVSECD R
R
R
R EEDIV10 EEDIV9 EEDIV8
Write:
Reset:
Unaffected by reset; $FF when blank
R
= Reserved
Figure 5-7. EEPROM Divider Non-Volatile Register High
(EEDIVHNVR))
Address: $FE11
Bit 7
6
5
4
3
2
1
Bit 0
Read:
EEDIV7 EEDIV6 EEDIV5
Write:
EEDIV4
EEDIV3 EEDIV2 EEDIV1 EEDIV0
Reset:
Unaffected by reset; $FF when blank
Figure 5-8. EEPROM Divider Non-Volatile Register Low (EEDIVLNVR)
These two registers are protected from erase and program operations if
the EEDIVSECD is set to logic 1 in the EEDIVH (see EEPROM
Timebase Divider Register) or programmed to a logic 1 in the
EEDIVHNVR.
NOTE:
Once EEDIVSECD in the EEDIVHNVR is programmed to 0 and after a
system reset, the EEDIV security feature is permanently enabled
because the EEDIVSECD bit in the EEDIVH is always loaded with 0
Technical Data
74
MC68HC08AZ32A — Rev 1.0
EEPROM
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