Kenwood PS-50, SP-430, PS-430, MB-430, AT-440, VS-1, YK-88SN, YK-88CN specifications Bpd, SN74LSI38

TS-440S

MB8418-LP20-GRA (Control unit 1050 )

AI O

OE1 0

			Addres s	Lo w
			buffer	decode r
,uPD7800
		A4 n
		a	}CA B
		A3 0	Address
	0E0	.~ S	buffe r
			--IT
	WR	WE	Inpu t
			buffe
			cs e
	Q50		Inpu t
TL	De,			CS B
			buffer
B
(IC4)
		cs ,

SEMICONDUCTO R

			mo o
			GN D
Memoria l			Symbol	Pin nam e
Alley			Ao—A 10	Address inpu t
128 x16 x 8
			I(1 — II Ix	Data in/ou t
			CS	Chip select	1
			CS 2	Chip select	2
I/O gat e			WE	Write enabl e
column decode r
			Vcc	Power (1 .5 V )
	L		GND	GN D
I /0 buffe r		CAB	NC .	No connection

Y1	---~ —~ O
7 I	lO x
T +5 V	— I/O Dolt) —

SN74LS138

BAT T

MBM27128 (Control unit IC52)

						Data outpu t
pPD7800			+15 V	Vcc		00' ~~ 0 7 —
				GN D			Pin nam e
	17	RD
				VPP
							Ao—A 13
				O E	Output enabl e		Oo — O7
				C E
					Chip enabl e	Output Buffer
+15 V --.-				PGM			CE
					Prog, roglc
			o	A O			OE
					Y decoder	Y selection
				Aa			PGM
	v		}BPD				Vcc
			7800
	Yt O					131072 bi t	Vpp
Y0 0
15	14				X decoder	(512 x 256 )	GND

Memoria l

SN74LSI38

all y

Address inpu t Data outpu t Chip enable inpu t Output enable inpu t Program inpu t Power suppl y Program power suppl y

GN D

30