mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 84

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

INITRM — Initialization of Internal RAM Position Register
INITEE— Initialization of Internal EEPROM Position Register
Operating Modes
5.5.3 EEPROM Mapping
Technical Data
84
RESET:
RESET:
RAM15
EE15
Bit 7
Bit 7
0
0
RAM14
EE14
6
0
6
0
RAM[15:13] — Internal RAM map position
The MC68HC912DG128 has 2K bytes of EEPROM which is activated by
the EEON bit in the INITEE register. Mapping of internal EEPROM is
controlled by four bits in the INITEE register. After reset EEPROM
address space begins at location $0800 but can be mapped to any 4K
byte boundary within the standard 64K byte address space. The
EEPROM block occupies the last 2K bytes of the 4K byte block.
EE[15:12] — Internal EEPROM map position
EEON — internal EEPROM On (Enabled)
Freescale Semiconductor, Inc.
These bits specify the upper three bits of the 16-bit RAM address.
Normal modes: write once; special modes: write anytime. Read
anytime.
These bits specify the upper four bits of the 16-bit EEPROM address.
Normal modes: write once; special modes: write anytime. Read
anytime.
This bit is forced to one in single-chip modes.
Read or write anytime.
0 = Removes the EEPROM from the map.
1 = Places the on-chip EEPROM in the memory map at the address
selected by EE[15:12].
For More Information On This Product,
RAM13
EE13
5
1
5
0
Go to: www.freescale.com
Operating Modes
EE12
4
0
0
4
0
3
0
0
3
0
0
2
0
0
2
0
0
MC68HC912DG128 — Rev 3.0
1
0
0
1
0
0
EEON
Bit 0
Bit 0
1
0
0
MOTOROLA
$0010
$0012