EM73C63 datasheet(8/40 Pages) EMC

8 / 40 page

* This specification are subject to be changed without notice.

8.11.2000

EM73C63

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

SLBR a

Object code: 0101 0101 1100 aaaa aaaa aaaa (a:1000h~1FFFh)

0101 0111 1100 aaaa aaaa aaaa (a:0000h~0FFFh)

Condition: SF=1; PC

← a ( branch condition satisified)

PC aaaaaaaaaaaa

SF=0 ; PC

← PC + 3 ( branch condition not satisified )

Original PC value + 3

(2) Subroutine instruction:

SCALL a

Object code: 1110 nnnn

Condition : PC

← a ; a=8n+6 ; n=1..Fh ; a=86h, n=0

PC 00000

aaaaa

LCALL a

Object code: 0100 0aaa aaaa aaaa

Condition: PC

← a

PROGRAM COUNTER (32K ROM)

Program counter ( PC ) is composed by a 13-bit counter, which indicates the next executed address for the

program ROM instruction.

For BRANCH and CALL instrcutions, PC is changed by instruction indicating. PC only can indicate the address

from 0000h~1FFFh. The bank number is decided by P3.

(1) Branch instruction:

SBR a

Object code: 00aa aaaa

Condition: SF=1; PC

← PC

12-6.a ( branch condition satisified )

PC Hold original PC value+1

aaaaaa

SF=0; PC

← PC +1( branch condition not satisified)

Original PC value + 1

LBR a

Object code: 1100 aaaa aaaa aaaa

Condition: SF=1; PC

← PC

12.a ( branch condition satisified )

PC Hold a

aaaaaa

SF=0; PC

← PC +2( branch condition not satisified)

Original PC value + 2

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