MDT90P01 Datasheet, PDF (4/11 Pages) Micon Design Technology Corporation – 4-bit micro-controller

(2) PC (Program Counter) : R2
Write PC --- unchanged
JUMP(CALL) --- from instruction word
RTWI --- from STACK
A8~A4
A3~A0
MDT90P01
Write PC --- from ALU
JUMP( CALL) --- from instruction word
RTWI --- from STACK
(3) STATUSL (Status register) : R3
Bit
Symbol
Function
0
TF
WDT Timer overflow Flag bit
1
C
Carry bit
2
Z
Zero bit
3
PF
Power loss Flag bit
STATUSH(Status register) : R4
Bit
Symbol
Function
0
——
Unimplemented
1
——
Unimplemented
2
SCALL
0: JUMP (initial)
1: CALL (Change JUMP instruction to CALL instruction.
This bit will be clear to zero automatically after CALL
was executed)
3
PCWUF
Pin change wake up from sleep
This specification is subject to be changed without notice. Please visit our web site for the most updated information.
http://www.mdtic.com.tw
P. 4
2008/5 Ver. 1.0