UP-600, UP-700 (serv.man25). UP600-700 Service Manual - Sharp ECR Service Manual (repair manual). Page 47

The weight control function built in the MPCA9 is used to provide an
interface with low-speed devices.

The block diagram of the wait control function is shown.

In the figure, the decoder, wait enabling register, AND-OR sections
are the same as those in the MPCA6 or 7, but other components are
newly incorporated in the MPCA5.

EXWAITZ and WAITZ are external weight signals which are to be
ORed inside the MPCA9 and output to the WAITZ. The EXWAITZ is a
general-purpose wait request terminal, and WAITZ is the wait request
signal from the VGA controller.

The UP-600/700 on CKDC9 for the CKDC PWB and one CKDC9 for
POLE display (option) to carry out the following control operations.

CKDC PWB CKDC9:

•

Clock (second data readable)

•

Buzzer

•

System reset

•

Key/Clerk switch

POLE CKDC9(UP-P16DP)

•

Customer display tube

CKDC9 is connected through the MPCA8.

Selector

/AS

 

CLK    WAIT RESET Counter

START

/RESET

/EXWAIT

/VWAIT

/LCDWAIT

/WAITZ

φ

WAIT

enable

For

RASP-

/RESET for 1,2,3WAIT

WAIT

enable

For

MISC

WAIT

Count

For

RASP

D

/Q

Selector

Selector

/RESET

/RESET
for 
1WAIT

/RESET

WAIT

Count

For

MISC

WAIT

Count

For

RASPN

WAIT

Count

For

RASPN

D

/Q

D

/Q

WAIT

enable

For

VRAM

•

VGA

I/O

D

/Q

Terminal autoweight signal

TXD2(P87)
SCK2(P83)

RXD2(P84)

TXDI
SCKI

RXDI

INT1

IRQ0

IRQ0

RES

STOP

(P57)

RESET

RESET

STH

HTS
SCK

KRQ
SHEN

STOP

HTS2
SCK2
STH2

HTS
SCK
STH

SRES

RESET

SW

FTI2

HTS1
SCK1
STH1

HTS
SCK
STH

INT4

SHEN

RESET

reset from MAIN

UP-P16DP/UP-I16DP

Key

Buzzer