NAD C715 Service Manual page 29

3. Pin Functions
Note: 3AI/F : 3 V circuit analog input/output pin
3I/F : 3 V circuit digital input/output pin
1.5AI/F : 1.5 V circuit analog input/output pin
Pin
Pin name
No.
1 RFZI
2 AVSS3
3 RFRP
4 FEI
5 SBAD/RFDC
6 TEI
7 TEZI
8 AVDD3
9 FOO
10 TRO
11 VREF
12 FMO
13 DMO
SBSY
14
(SPCK)
SBOK
(FOK)
15
(CLCK)
(MBOV)
IPF
16
(SPDA)
I/O
I Input pin for the RF ripple zero-cross
3AI/F signal.
— Grounding pin for 3.3 V analog circuits.
O
RF ripple signal output pin.
3AI/F
O
Focus error signal input pin.
3AI/F
O
Subbeam addition signal input pin.
3AI/F
O
Tracking error signal input pin.
3AI/F
I Input pin for tracking error signal
3AI/F zero-cross.
— Supply voltage pin for 3.3 V analog circuit.
O
Focus equalizer output pin.
3AI/F
O
Tracking equalizer output pin.
3AI/F
O
Analog reference supply voltage pin.
3AI/F
O
Speed error/feed equalizer output pin.
3AI/F
O
Disc equalizer output pin.
3AI/F
Pin for outputting the subcode block sync
signal. It is "H" at position S1 when the
O
subcode sync signal is detected.
3I/F
(CD Processor Status Read
Clock(176.4KHz) output)
Pin for outputting the CRCC check result of
a subcode Q data check. It is "H" when the
check result is OK.
O
(Focus OK signal)
3I/F
(Input/output pin for the clock used in
reading the subcode P to W data.)
(CD Buffer memory overflow output)
Correction flag output pin.
O "H" if the AOUT pin outputs an
3I/F uncorrectable symbol in C2 correction.
(CD Processor Status signal output)
Description
2-18
Remark
To be connected to the
RFRP via 0.033 uF.
—
—
Monitor pin for various
signals.
To be connected to the
TEI via 0.033 uF.
—
—
—
Connected to the VRO
and PV within the IC.
REF
To be connected to 0.1
uF.
PWM ternary output
(AVDD3, GND, and
V ).
REF
"H" at S1 when Subcode
Sync is detected.
—
—