Philips 70DCC600 Service Manual page 16

Signal name Signal
flow
Function Explanation
TCH1
information of DEQ (see also AUX and CHO .. CH7).
TCH2
TCH3
TCH4
TCH5
TCH6
TCH7
TCHAUX
TX DAI -> digital out transmit data Digital data output of DAI according IEC format.
UNLOCK DAI -> n.c.
unlock VCO UNLOCK indicates that VCO frequency is locked/unlocked
to received data.
URDA DDSP -> SSC
unreliable data Only during playback URDA indicates that, regardless of
all other flag information, all main data, system information
or AUX data is unusable. URDA occurs during a mode
change from data recording to playback or if the DDSP
must re-synchronize with the tape signals.
USYNCI
DAI
f-
liP sync input Indicates the start of a new data frame when in transparent
mode.
USYNCO DAI ->
sync output
Indicates start of a new data frame when in reception
mode.
VAL DEQ ..... test pin validation data Validation signal output for data bits. To test equalization
performance it is possible to output the equalized
channels. The DEQ has for this purpose two digital outputs
present: DIG EYE and VAL (see also DIGEYE).
VIN DEQ
f-
read amp voltage input DEQ inputs via VIN time multiplexed data from read
amplifier. See also RDMUX.
VIRGIN DEQ ..... DDSP Virgin detection Control output of DEQ to inform the microprocessor if a
blank tape is inserted. See also SEARCH.
WCLCK write amp
f-
DDSP
write clock
Clock signal for the write amplifier as timing reference (f
=
3.072MHz). See also WCLOCK.
WCLOCK DDSP ..... write amp write clock Write clock for write amplifier coming from DDSP. See also
WCLK.
WDATA DDSP ..... write amp write data Serial data signal of the 8 main channels and AUX
channel, directed to the write amplifier.
WIND Main ll-P -> wind motor control line Control signal to switch the driver bridge of the wind motor
driver to the desired function. High level in FastForward and in
Play mode.
+WIND Wind motor driver ..... wind supply line Connection to terminal of wind motor.
-WIND
motor
WRN DDSP ..... DRAM write enable Write enable of the DRAM.
WS
ERCO
H
SSC
word select 1
2
S-interface word selection I/O line.
DDSP
f-
SSC Is connected to SSWS pin of SSC. See also SSWS.
X221N
SSC <-
crystal input 22,5792 MHz
X220UT SSC ..... crystal output
X241N
SSC
f-
crystal input
24,576 MHz
X240UT SSC ..... crystal output
XTAL1
DAC <- 256Fs
XTAL2 DAC ..... n.c.
XSYS
DAC ..... n.c.
buffered output from crystal oscillator.
CS 45 924
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