MDT10P22(DF)
(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
RTWI, RET --- from STACK
A9
A8
A7~A0
Write PC, JUMP, CALL --- from STATUS b5
LJUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
Write PC --- from ALU
LJUMP, JUMP, LCALL, CALL --- from instruction word
RTWI, RET --- from STACK
(4) STATUS (Status register) : R3
Bit
Symbol
Function
0
1
2
3
4
5
C
Carry bit
HC
Z
Half Carry bit
Zero bit
PF
TF
page
Power loss Flag bit
Time overflow Flag bit
ROM Page select bit :
00 : 000H --- 1FFH
01 : 200H --- 3FFH
General purpose bit
7
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This specification are subject to be changed without notice. Any latest information
please preview http;//www.mdtic.com.tw
P. 5
2007/8 Ver. 1.6
MDTIC [ Micon Design Technology Corporation ]
