MDT2005(IB)

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P. 3

2005/6 VER1.3

(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