Tmm23256P - Sony HB-501P Service Manual

TMM23256P (TOSHIBA)
N-MOS MASK PROGRAMMABLE ROM 256K-BIT (32768x8)
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TMS4416-1 5NL (Tl) (ACCESS TIME = 150nS)
uPD4141 6C-1 5 (NEC) (ACCESS TIME = 1 50nS)
N-MOS 16384-WORD BY 4-BIT DYNAMIC RAM
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WE ; WRITE ENABLE
MODE
CONTROL I DATA
WE I OE D1~D4
WRITE
READ
DATA IN
DATA OUT
Hl-Z
0 ; LOW LEVEL
1 ; HIGH LEVEL
X ; DON'T CARE
HI -Z ; HIGH IMPEDANCE
DO D1 D2 D3 DC 05 D6 D7
AO ~A14 ; ADDRESS INPUT
CE I CHIP ENABLE
DO~D7 5 DATA
OE I OUTPUT ENABLE
RAS
c"as
WE
4-6
HB-50 IP/50 IF