Sharp MZ-3500 service manual 8253 OUT

8 2 5 1

	C LK	I N	2.45MHz clock
	DSK	I N	DATA SET READY
	D TK	OUT	DATA TERMINAL READY
825 1	CTS	1 N	CLEAR TO SEND
chip address[0001/xxxx]	Rl S	OUT	REQUEST TO SEND
	TXD	OUT	TRANSMITTER DATA
	T X R DY N.C.
I N Uix	TXE	N.C.
O U T)	TXC	I N	TRANSMITTER CLOCK
	RXD	IN	RECEIVE DATA
	RXRDY OUT		RECEIVER READY
	"RXC	I N	RECEIVE CLOCK
	SYN/BD	N.C.

8253

	CLKO	IN	2.45MHz
	GATED	IN	Vcc
8253	OUTO	OUT	To TXC, RXC of the 8251
chip address[0010/xxxx]	CLK1	IN	2.45MHz
	GATE1	IN	From OUT2
I N #UxH	OUT1	OUT	MUSIC
OUT# 2 X H	CLK2	IN	2.45MHz
	GATE 2	IN	Vcc
	OUT 2	OUT	To GATE 1

INTO TO MAIN FROM SUB

		INTO
POWER	ON RESET	H
SOO - S I W (	I O R Q - W R of SUB)	L
f N T R = L ( F R O M M A I N )		H

INT TO SUB FROM KEY

STK= (L)

M 2 3500

READY

CS

PO (MPER SUT), ER

CD

RD

OUT 0 of 8253

SD

To 3iil>CPU of

8253 OUT

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