(4) STATUS (Status register) : R3
Bit
Symbol
Function
0
C
Carry bit
1
HC
Half Carry bit
2
Z
Zero bit
3
PF
Power loss Flag bit
4
TF
Time overflow Flag bit
5-7
——
General purpose bit
MDT2005
(5) MSR (Memory Select Register) : R4
(6) PORT A : R5
PA3~PA0, I/O Register
(7) PORT B : R6
PB7~PB0, I/O Register
(8) TMR (Time Mode Register)
Bit
2—0
3
4
5
Symbol
PS2—0
PSC
TCE
TCS
Function
Prescaler Value
RTCC rate
WDT rate
000
1:2
1:1
001
1:4
1:2
010
1:8
1:4
011
100
1 : 16
1 : 32
1:8
1 : 16
101
1 : 64
1 : 32
110
1 : 128
1 : 64
111
1 : 256
1 : 128
Prescaler assignment bit :
0 — RTCC
1 — Watchdog Timer
RTCC signal Edge :
0 — Increment on low-to-high transition on RTCC pin
1 — Increment on high-to-low transition on RTCC pin
RTCC signal set :
0 — Internal instruction cycle clock
1 — Transition on RTCC pin
This specification are subject to be changed without notice. Any latest information please preview
http;//www.mdtic.com.tw
P. 4
VER1.1