Kenwood DPC-77 Service Manual page 28

30
CIRCUIT DESCRIPTION
Terminal | Terminal v0 Function
No. name
44 "RAO7 © | Address output of external RAM. ADDRO7.
45 | RAO8 © | Address output of external RAM. ADDRO8
RAOY O Address output of external RAM. ADDRO9
RA10 | © | Address output of external RAM. ADDR10
RA11 © | Address output of external RAM. ADDR11 (MSB)
RAWE O Write Enable signal output to external RAM. (Active at my,
"RACS 0 | Chip select signal output to external RAM. (Active at "L").
C4M 0 | Crystal dividing output. f= 4.2336 MHz. .
Vss — | GND (OV). 7 :
XTAL | | _ _ | Crystal oscillator input. (16.9344 MHz)
-xTAO | 0 | Crystal oscillator output. (16.9344 MHz)
_ Mot | | Mode select input 1.
if 7 Mode select input 2.
: | Mode select input 3.
| Audio data output 'code select input. 2's 'complement output when i er offset binary output when HN,
| T Audio data output mode select input. Serial output when "'L"', 'parallel output when a wie oe
oO le Aperture compensation control output. ""H'' when R-ch. 7
O ; Aperture compensation control output. "H" when nL ch.
Oo. DAO1 (parallel audio data LSB) output when PSSL=" oboe C1FI output when PSSL=""L"". 7
on PSSL="L"' 7 , —
~O | DAO3 output when PSSL="h, C2F1 output when PSSL="L"".
0 _| DAO4 output when PSSL=""H'', C2F2 output when Posie.
0 DAOS output when PSSL= OHM, C2FL output when PSSL = asses
O DAO6 output when PSSL=''H'', C2PO output when PSSL=' 'L"
0 DAOZ output when = EUe RFCK output when PSSL = moe
0 DAOS output when PSSL= He, WFCK output when PSSL= au
oO DAOY output when PSSL="" H"' PLCK output when PSSL= se ae
ie) DA10 output when PSSL="'H", UGFS output when PSSL = nee
O | DA11 output when PSSL=""H'', GTOP output when PSSL="L"
_ Power supply (+5 Vv). : i
O DA12 output when PSSL="" _ RAOV output when PSSL = ae
© | DA13 output when PSSL=""H", C4LR output when PSSL_= "L"".
0 DA14 output when PSSL= BEDS, C210 output when PSSL= "LY. '
© | DA15 output when PSSL="H"', C210 output when PSSL=""L"'. i :
O | DAI6 (parallel audio data MSB) output when PSSL=""H'', DATA output when psguanl
0 "Strobe signal output. (88.2 kHz)
O Strobe signal output. (44. 1 kHz)
Notes:
ae
ae ~Jerror correction status monitor output for C1 decode.
PLCs
a Sutput. f= 4.3218 Mlz when |oeked to:the FEM
ee "error correction status monitor output for C2 decode.
moe Bees
acces ae Gane ae
C2FL : Correction status output. Goes ''H'' when the currently cor-
RAOV: +4 frame jitter absorption RAM overflow and underflow
rected C2 series data cannot be corrected. display output.
C2PO : C2 pointer signal. Synchronized to the audio data output. C4LR- : Strobe signal. {176.4 kHz)
RFCK : Read frame clock output. 7.35 MHz when locked to the
C210 : C210 invert output.
crystal line.
C210 : Bit clock output. (2.1168 MHz)
WFCK: Write frame clock output. 7.35 MHz when locked to the
DATA:
Audio signal serial data output.
crystal line.