MDT2020(FF)
(4) STATUS (Status register) : R3
Bit
0
1
2
3
4
6—5
Symbol
C
HC
Z
PF
TF
page
Carry bit
Half Carry bit
Zero bit
Power loss Flag bit
Time overflow Flag bit
Page select bit :
00 : 000H --- 1FFH
01 : 200H --- 3FFH
10 : 400H --- 5FFH
11 : 600H --- 7FFH
7
——
General purpose bit
Function
(5) MSR (Memory Select Register) : R4
Memory Select Register :
00 : 10~1F
01 : 30~3F
10 : 50~5F
11 : 70~7F
b7
b6
b5
b4
b3
b2
b1
b0
Read only “1”
Indirect Addressing Mode
(6) PORT A : R5
PA3~PA0, I/O Register
(7) PORT B : R6
PB7~PB0, I/O Register
(8) PORT C : R7
PC7~PC0, I/O Register
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 3
2007/8 VER 1.5
MDTIC [ Micon Design Technology Corporation ]
