MDT10P43 Datasheet, PDF (4/10 Pages) Micon Design Technology Corporation – 8-bit Micro-controller

MDT10P43
(2) PC (Program Counter) : R2
Write PC, CALL --- always 0
LJUMP, JUMP, LCALL --- from instruction word
RTIW, RET --- from STACK
A9
A8
A7~A0
Write PC, JUMP, CALL --- from STATUS b5
LJUMP, LCALL --- from instruction word
RTIW, RET --- from STACK
Write PC --- from ALU
LJUMP, JUMP, LCALL, CALL --- from instruction word
RTIW, RET --- from STACK
(3) STATUS (Status register) : R3
Bit
Symbol
Function
0
C
1
HC
2
Z
3
PF
4
LPT
5
67
Carry bit
Half Carry bit
Zero bit
Power loss Flag bit
Low power detect
=0 : Vdd is lower than 2.3 ~ 2.5V
=1 : Vdd is higher than 2.3 ~ 2.5V
General purpose bit
Carrier frequency control bits
=00 No carrier (default)
=01 Fosc/8, 1/2 duty
=10 Fosc/12, 1/2 duty
=11 Fosc/12, 1/3 duty (1/3 – Hi ; 2/3 - Low)
(4) MSR (Memory Select Register) : R4
(5) PORT A : R5
Bit 7-0 : Port A data input
(6) CPIO PB : R6
Bit 7-1 : PB7-PB1 output register (open drain output)
Bit 0 : PB0 output register (CMOS output)
This specification is subject to be changed without notice. Please visit our web site for the most updated information.
http://www.mdtic.com.tw
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2005.8 Ver. 1.3