XC68HC05P18A Motorola, XC68HC05P18A Datasheet - Page 86

• Manufacturer Part Number: XC68HC05P18A
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

EEPROM
10.3 EEPROM Programming Register
Technical Data
86
Address: $001C
The contents and use of the programming register (EEPROG) are
discussed here.
CPEN — Charge Pump Enable Bit
ER1 and ER0 — Erase Select Bits
Reset:
Read:
Write:
When set, CPEN enables the charge pump that produces the internal
EEPROM programming voltage. This bit should be set concurrently
with the LATCH bit. The programming voltage will not be available
until EEPGM is set. The charge pump should be disabled when not in
use. CPEN is readable and writable and is cleared by reset.
ER1 and ER0 form a 2-bit field that is used to select one of three
erase modes: byte, block, or bulk.
selected for each bit configuration. These bits are readable and
writable and are cleared by reset.
Figure 10-1. EEPROM Programming Register (EEPROG)
Bit 7
0
0
= Unimplemented
ER1
CPEN
0
0
1
1
6
0
Table 10-1. Erase Mode Select
EEPROM
5
0
0
ER0
0
1
0
1
ER1
4
0
Table 10-1
Program, no erase
ER0
3
0
Block erase
Byte erase
Bulk erase
Mode
LATCH
shows the modes
2
0
MC68HC05P18A
EERC
1
0
MOTOROLA
EEPGM
Bit 0
0