M68HC128 Datasheet, PDF (108/362 Pages) Motorola, Inc – Microcontrollers

FLASH EEPROM
Freescale Semiconductor, Inc.
STRE — Spare Test Row Enable Bit
The spare test row consists of one FLASH EEPROM array row. The spare test
row is reserved and contains production test information which must be
maintained through several erase cycles. When STRE is set, the decoding for
the spare test row overrides the address lines which normally select the other
rows in the array.
0 = LIB accesses are to the FLASH EEPROM array.
1 = Spare test row in array enabled if SMOD is active
MWPR — Multiple Word Programming Bit
Used primarily for testing, if MPWR = 1, the two least significant address lines,
ADDR1 and ADDR0, will be ignored when programming a FLASH EEPROM
location. The word location addressed if ADDR1 and ADDR0 = 00, along with
the word location addressed if ADDR1 and ADDR0 = 10, will both be
programmed with the same word data from the programming latches. This bit
should not be changed during programming.
0 = Multiple word programming disabled
1 = Program 32 bits of data
8.3.4 FLASH EEPROM Control Register
Address: $00F7
Bit 7
6
Read:
0
0
Write:
Reset: 0
0
5
4
3
2
1
0
FEESWAI SVFP
ERAS
LAT
0
0
0
0
0
Figure 8-4. FLASH EEPROM Control Register (FEECTL)
Bit 0
ENPE
0
This register controls the programming and erasure of the FLASH EEPROM.
FEESWAI — FLASH EEPROM Stop in Wait Control Bit
0 = Do not halt FLASH EEPROM clock when in wait mode.
1 = Halt FLASH EEPROM clock when in wait mode.
NOTE: The FEESWAI bit cannot be asserted if the interrupt vector resides in the FLASH
EEPROM array.
SVFP — Status V_FP Voltage Bit
SVFP is a read-only bit.
0 = Voltage of V_FP pin is below normal programming voltage levels.
1 = Voltage of V_FP pin is above normal programming voltage levels.
ERAS — Erase Control Bit
This bit can be read anytime or written when ENPE = 0. When set, all locations
in the array will be erased at the same time. The boot block will be erased only
if BOOTP = 0. This bit also affects the result of attempted array reads. See
Table 8-1 for more information. Status of ERAS cannot change if ENPE is set.
0 = FLASH EEPROM configured for programming
1 = FLASH EEPROM configured for erasure
Data Sheet
108
FLASH EEPROM
For More Information On This Product,
Go to: www.freescale.com
M68HC12B Family — Rev. 9.0
MOTOROLA