MDT10P10_04 Datasheet, PDF (3/16 Pages) Micon Design Technology Corporation – 8-bit micro-controller

(1) 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
RTIW, RET --- from STACK
MDT10P10
A9
A8
A7~A0
Write PC, JUMP, CALL --- from STATUS b5 (ROM 1K)
LJUMP, LCALL --- from instruction word
RTIW, RET --- from STACK
Write PC --- from ALU
LJUMP, JUMP, LCALL, CALL --- from instruction word
RTIW, RET --- from STACK
(4) STATUS (Status register) : R3
Bit
Symbol
Function
0
1
2
3
4
5
67
C
HC
Z
PF
TF
page 0
Carry bit
Half Carry bit
Zero bit
Power loss Flag bit
Time overflow Flag bit
Page select bit :
0 : 000H --- 1FFH
1 : 200H --- 3FFH
General purpose bit
(5) MSR (Memory Select Register) : R4
(6) PORT A : R5
PA3~PA0, I/O Register
(7) PORT B : R6
PB7~PB0, I/O Register
This specification are subject to be changed without notice. Any latest information
please preview http;//www.mdtic.com.tw P. 3
2004/1 VER 1.2