MDT10P41A1 Datasheet, PDF (4/11 Pages) Micon Design Technology Corporation – 8-bit Micro-controller

MDT10P41A1
(1) IAR ( Indirect Address Register) : R0
(2) PC (Program Counter) : R2
Write PC, CALL --- always 0
LJUMP, JUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
A9
A8
A7~A0
Write PC, JUMP, CALL --- from STATUS b5 (ROM 1K)
LJUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
Write PC --- from ALU
LJUMP, JUMP, LCALL, CALL --- from instruction word
RTWI, RET --- from STACK
(3) STATUS (Status register) : R3
Bit
Symbol
Function
0
1
2
3
4
5
67
C
HC
Z
PF
page 0
Carry bit
Half Carry bit
Zero bit
Power loss Flag bit
Always read as high
Page select bit :
0 : 000H --- 1FFH
1 : 200H --- 3FFH
General purpose bit
(4) MSR (Memory Select Register) : R4
(5) PORT A : R5
Bit 3-0 : PA0~PA3, I/O Register
6-4 : Always read as high.
7 : Always read as zero.
(6) PORT B : R6
PB7~PB0, I/O Register
(7) CPIO A, CPIO B (Control Port I/O Mode Register)
The CPIO register is “write-only”
“0”, I/O pin in output mode;
“1”, I/O pin in input mode.
This specification is subject to be changed without notice. Please visit our web site for the most updated information.
http://www.mdtic.com.tw
4 of 11
2005/6 Ver.1.6