MC68HC908AS60ACFN FREESCALE [Freescale Semiconductor, Inc], MC68HC908AS60ACFN Datasheet - Page 93
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MC68HC908AS60ACFN
Manufacturer Part Number
MC68HC908AS60ACFN
Description
M68HC08 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC908AS60ACFN.pdf
(414 pages)
- Current page: 93 of 414
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AUTO — Automatic Termination of Program/Erase Cycle
EEPGM — EEPROM-2 Program/Erase Enable
7.5.2 EEPROM-2 Array Configuration Register
The EEPROM-2 array configuration register configures EEPROM-2 security and EEPROM-2 block
protection.
This read-only register is loaded with the contents of the EEPROM-2 nonvolatile register (EE2NVR) after
a reset.
Bit 7:5 — Unused Bits
EEPRTCT — EEPROM-2 Protection Bit
Freescale Semiconductor
When AUTO is set, EEPGM is cleared automatically after the program/erase cycle is terminated by
the internal timer.
(See note D for
Memory
This read/write bit enables the internal charge pump and applies the programming/erasing voltage to
the EEPROM-2 array if the EELAT bit is set and a write to a valid EEPROM-2 location has occurred.
Reset clears the EEPGM bit.
These read/write bits are software programmable but have no functionality.
The EEPRTCT bit is used to enable the security feature in the EEPROM (see EEPROM-2
Program/Erase Protection).
This feature is a write-once feature. Once the protection is enabled it may not be disabled.
1 = Automatic clear of EEPGM is enabled
0 = Automatic clear of EEPGM is disabled
1 = EEPROM-2 programming/erasing power switched on
0 = EEPROM-2 programming/erasing power switched off
1 = EEPROM-2 security disabled
0 = EEPROM-2 security enabled
Characteristics)
Address:
Writing logic 0s to both the EELAT and EEPGM bits with a single instruction
will clear EEPGM only to allow time for the removal of high voltage.
Reset:
Read: UNUSED
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
7.4.5.2 EEPROM-2
Figure 7-3. EEPROM-2 Array Configuration Register (EE2ACR)
$FF7F
Bit 7
= Unimplemented
UNUSED
6
Programming,
UNUSED
5
Contents of EE2NVR ($FF7C)
EEPRTCT
NOTE
4
7.4.5.3 EEPROM-2
EEBP3
3
EEBP2
2
Erasing, and
EEPROM-2 Register Descriptions
EEBP1
1
EEBP0
28.1.13 EEPROM
Bit 0
93
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