MDT10P257 Datasheet, PDF (3/18 Pages) Micon Design Technology Corporation – 8-bit micro-controlle

7. Memory Map
MDT10P257
2. Register Map
Address
Description
00
Indirect Addressing Register
01
RTCC
02
PC
03
STATUS
04
MSR
05
Port A
06
Port B
07
Port C
08~0F
Internal RAM, General Purpose Register
10~1F
Internal Memory Select Register (bank 0)
30~3F
Internal Memory Select Register (bank 1)
50~5F
Internal Memory Select Register (bank 2)
70~7F
Internal Memory Select Register (bank 3)
Note : 00~0F, 20~2F, 40~4F, 60~6F are accessed to the same memory location.
2. IAR ( Indirect Address Register) : R0
(2) RTCC (Real Time Counter/Counter Register) : R1
(3) PC (Program Counter) : R2
Write PC, CALL --- always 0
LJUMP, JUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
A10
A9
A8
A7~A0
Write PC, JUMP, CALL --- from b6-5 of STATUS
LJUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
Write PC --- from ALU
LJUMP, JUMP, LCALL, CALL --- from instruction word
RTWI, RET --- from STACK
This specification are subject to be changed without notice. Any latest information please visit our web site
(http;//www.mdtic.com.tw) for detail
P. 3
2011/02 VER 1.1