MC68HC705J2 Datasheet, PDF (52/82 Pages) Freescale Semiconductor, Inc – member of the low-cost

Freescale Semiconductor, Inc.
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9.3 Memory Map
Figure 9-1 shows the 2 Kbyte MC68HC05J1 emulation mode memory map.
$0000
$001F
$0020
$00BF
$00C0
$00FF
$0100
$02FF
$0300
I/O REGISTERS
32 BYTES
UNUSED
160 BYTES
STACK RAM
64 BYTES
UNUSED
512 BYTES
PORT A DATA REGISTER
PORT B DATA REGISTER
UNUSED
UNUSED
PORT A DATA DIRECTION REGISTER
PORT B DATA DIRECTION REGISTER
UNUSED
UNUSED
TIMER CONTROL & STATUS REGISTER
TIMER COUNTER REGISTER
UNUSED
•
•
•
UNUSED
EPROM PROGRAMMING REGISTER
UNUSED
UNUSED
RESERVED
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
$0009
$000A
•
•
•
$001B
$001C
$001D
$001E
$001F
USER EPROM
1024 BYTES
$06FF
$0700
$0701
MASK OPTION REGISTER
BOOTLOADER ROM
239 BYTES
$07EF
$07F0
$07FF
USER VECTORS
(EPROM)
16 BYTES
COP REGISTER _*
USER
EPROM
8 BYTES
TIMER INTERRUPT VECTOR (HIGH)
TIMER INTERRUPT VECTOR (LOW)
EXTERNAL INTERRUPT VECTOR (HIGH)
EXTERNAL INTERRUPT VECTOR (LOW)
SOFTWARE INTERRUPT VECTOR (HIGH)
SOFTWARE INTERRUPT VECTOR (LOW)
RESET VECTOR (HIGH)
RESET VECTOR (LOW)
*WRITING 0 TO BIT 0 OF $07F0 CLEARS
COP TIMER. READING $07F0 RETURNS
USER EPROM DATA.
$07F0
•
•
•
$07F7
$07F8
$07F9
$07FA
$07FB
$07FC
$07FD
$07FE
$07FF
Figure 9-1. MC68HC05J1 Emulation Mode Memory Map
MC68HC05J1 EMULATION MODE
9-2
Rev. 2
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