MDT1020

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P.5

2005/6 Ver1.4

(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

(9) 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

(10) CPIO A, CPIO B, CPIO C (Control Port I/O Mode Register)