XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 126

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

EEPROM-2 Memory
7.6.5 EEPROM-2 Timebase Divider Non-Volatile Register
Technical Data
126
NOTE:
Address:
Address:
The 16-bit EEPROM-2 timebase divider non-volatile register consists of
two 8-bit registers: EE2DIVHNVR and EE2DIVLNVR. The contents of
these two registers are respectively loaded into the EEPROM-2
timebase divider registers, EE2DIVH and EE2DIVL, after a reset.
These two registers are erased and programmed in the same way as an
EEPROM-2 byte.
These two registers are protected from erase and program operations if
the EEDIVSECD is set to logic 1 in the EE2DIVH (see ) or programmed
to a logic 1 in the EE2DIVHNVR.
Once EEDIVSECD in the EE2DIVHNVR is programmed to 0 and after a
system reset, the EE2DIV security feature is permanently enabled
because the EEDIVSECD bit in the EE2DIVH is always loaded with 0
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 7-7. EEPROM-2 Divider Non-Volatile Register High
Figure 7-8. EEPROM-2 Divider Non-Volatile Register Low
EEDIVSECD
EEDIV7
$FF70
$FF71
Bit 7
Bit 7
R
EEDIV6
EEPROM-2 Memory
R
6
6
= Reserved
EEDIV5
R
5
5
Unaffected by reset; $FF when blank
Unaffected by reset; $FF when blank
(EE2DIVHNVR))
(EE2DIVLNVR)
EEDIV4
R
4
4
EEDIV3
R
3
3
MC68HC908AZ60A — Rev 2.0
EEDIV10
EEDIV2
2
2
EEDIV9
EEDIV1
1
1
MOTOROLA
EEDIV8
EEDIV0
Bit 0
Bit 0