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MDT2005
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P. 4
VER1.1
(4) STATUS (Status register) : R3
Bit
Symbol
Function
0
1
2
3
4
5-7
C
HC
Z
PF
TF
——
Carry bit
Half Carry bit
Zero bit
Power loss Flag bit
Time overflow Flag bit
General purpose bit
(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
Symbol
Function
Prescaler Value
RTCC rate
WDT rate
2—0
PS2—0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
3
PSC
Prescaler assignment bit :
0 — RTCC
1 — Watchdog Timer
4
TCE
RTCC signal Edge :
0 — Increment on low-to-high transition on RTCC pin
1 — Increment on high-to-low transition on RTCC pin
5
TCS
RTCC signal set :
0 — Internal instruction cycle clock
1 — Transition on RTCC pin