mc68hc11ea9 Freescale Semiconductor, Inc, mc68hc11ea9 Datasheet - Page 13

• Manufacturer Part Number: mc68hc11ea9
• Description: 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

INIT — RAM and I/O Mapping Register
RAM[3:0] — RAM Map Position
REG[3:0] — 64-Byte Register Block Position
MC68HC11EA9
MC68HC11EA9TS/D
RESET:
These four bits, which specify the upper hexadecimal digit of the RAM address, control position of RAM
in the memory map. RAM can be positioned at the beginning of any 4 Kbyte page in the memory map.
It is initialized to address $0000 out of reset.
These four bits specify the upper hexadecimal digit of the address for the 64-byte block of internal reg-
isters. The register block, positioned at the beginning of any 4 Kbyte page in the memory map, is initial-
ized to address $1000 out of reset.
$FFFF
$D000
$B600
$0000
$1000
SINGLE
CHIP
RAM3
BIT 7
0
EXPANDED
EXT
EXT
EXT
RAM2
6
0
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 6 MC68HC(7)11EA9 Memory Map
BOOTSTRAP
RAM1
5
0
Go to: www.freescale.com
RAM0
SPECIAL
EXT
EXT
EXT
TEST
4
0
REG3
3
0
REG2
B7FF
BFFF
FFFF
01FF
103F
B600
BF00
D000
0000
1000
2
0
BOOT
ROM
64-BYTE REGISTER BLOCK
512 BYTES EEPROM
12 KBYTES ROM/EPROM
512 BYTES RAM
REG1
1
0
BFC0
BFFF
FFC0
FFFF
REG0
BIT 0
1
SPECIAL MODES
INTERRUPT
VECTORS
NORMAL
MODES
INTERRUPT
VECTORS
EA9 MEM MAP
$103D
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