AN1836 Motorola / Freescale Semiconductor, AN1836 Datasheet - Page 4

• Manufacturer Part Number: AN1836
• Description: FLASH Programming for Motorola MC68HC912 Microcontrollers
• Manufacturer: Motorola / Freescale Semiconductor

Application Note
FLASH EEPROM
Control Register
4
The FEECTL register (located at $00F7) controls the actual
programming and erasing of the FLASH EEPROM. In this register, five
bits are used to control the FLASH. All bits are 0 upon reset.
FEESWAI
SVFP
ERAS
LAT
ENPE
Address:
Reset:
FEESWAI (bit 4) controls the behavior of the FLASH EEPROM clock
while in wait mode.
SVFP (bit 3), the V
programming voltage levels; clear otherwise (read only). This is not a
guarantee that V
only as a secondary check.
ERAS (bit 2), when set, configures the array for erasure.
LAT (bit 1), when set, enables the programming latches.
ENPE (bit 0), when set, applies the programming/erase voltage to the
array.
Read:
Write:
Figure 4. FLASH EEPROM Control Register (FEECTL)
$00F7
Bit 7
0
0
6
0
0
FP
FP
is within specified tolerances and should be used
status bit, is set when V
5
0
0
FEESWAI
4
0
SVFP
3
0
FP
ERAS
2
0
is near normal
LAT
1
0
MOTOROLA
AN1836
ENPE
Bit 0
0