MDT10P43

Spec

This specification is subject to be changed without notice. Please visit our web site for the most updated information.

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4 of 10

2004/12/2 Ver. 1.0

(2) PC (Program Counter) : R2

Write PC, CALL --- always 0

LJUMP, JUMP, LCALL --- from instruction word

RTIW, RET --- from STACK

A9

A8

A7~A0

Write PC, JUMP, CALL --- from STATUS b5

LJUMP, LCALL --- from instruction word

RTIW, RET --- from STACK

Write PC --- from ALU

LJUMP, JUMP, LCALL, CALL --- from instruction word

RTIW, RET --- from STACK

(3) STATUS (Status register) : R3

Bit

Symbol

Function

0

1

2

3

4

5

6—7

C

HC

Z

PF

LPT

——

——

Carry bit

Half Carry bit

Zero bit

Power loss Flag bit

Low power detect

General purpose bit

Carrier frequency control bits

=00 No carrier (default)

=01 Fosc/8, 1/2 duty

=10 Fosc/12, 1/2 duty

=11 Fosc/12, 1/3 duty

(4) MSR (Memory Select Register) : R4

(5) PORT A : R5

Bit 7-0 : Port A data input

(6) TRIS PB :

Bit 7-1

: PB7-PB1 output register (open drain output)

Bit 0

: PB0 output register (CMOS output)