80
XC-IS21MD
¡N-
o.
Pin Name
I/O
Function
No.
Pin Name
I/O
Function
1
SQSO
O
SubQ 80-bit, PCM peak and level data output
CD TEXT data output
41
TE
I
Tracking error input
2
SQCK
I
Clock input for SQSO readout
42
CE
I
Center servo analog input
3
XRST
I
System reset Reset when "L"
43
RFDC
I
RF signal input
4
SYSM
I
Mute input Mute when "H"
44
ADIO
O
OP amplifier output
5
DATA
I
Serial data input from CPU
45
AV
SS
0
−
Analog GND
6
XLAT
I
Latch input from CPU
Serial data is latched at the falling edge.
46
IGEN
I
Constant current input for OP amplifier
7
CLOK
I
Serial data transfer clock input from CPU
47
AV
DD
0
−
Analog power supply
8
SENS
O
SENS output to CPU
48
ASYO
O
EFM full-swing output ("L"=VSS, "H"=VDD)
9
SCLK
I
Clock input for SENS serial-data readout
49
ASYI
I
Asymmetry comparate voltage input
10
V
DD
−
Digital power supply
50
BIAS
I
Constant current input of the asymmetry circuit
11
ATSK
I/O Input and output for unti-shock
51
RFAC
I
EFM signal input
12
SPOA
I
Microcomputer extended interface (input A)
52
AV
SS
3
−
Analog GND
13
SPOB
I
Microcomputer extended interface (input B)
53
CLTV
I
VCO control voltage input for master
14
XLON
O
Microcomputer extended interface (output)
54
FILO
O
Filter output for master PLL (Slave=digital PLL)
15
WFCK
O
WFCK output
55
FILI
I
Filter input for master PLL
16
XUGF
O
XUGF output MNT1 and RFCK output by
switching the command.
56
PCO
O
Charge pump output for master PLL
17
XPCK
O
XPLCK output MNT0 output by switching the
command.
57
AV
DD
3
−
Analog power supply
18
GFS
O
GFS output MNT3 and XRAOF output by
switching the command.
58
V
SS
−
Digital GND
19
C2PO
O
C2PO output GTOP output by switching the
command.
59
V
DD
−
Digital power supply
20
SCOR
O
Outputs "H" when either subcode sync. S0 or S1 is
detected.
60
DOUT
O
DIGITAL OUT output
21
COUT
I/O Input and output of track-number count signal
61
LRCK
O
D/A interface LR clock output f=Fs
22
MIRR
I/O Mirror signal input and output
62
PCMD
O
D/A interface
Serial data output (two's complement, MSB first)
23
DFCT
I/O Defect signal input and output
63
BCK
O
D/A interface Bit clock output
24
FOK
I/O Focus OK signal input and output
64
EMPH
O
Outputs "H" when the playback disc has emphasis,
and "L" when there is no emphasis.
25
LOCK
I/O
GFS is sampled at 460Hz;when GFS is "H", this pin
outputs "H". If GFS is "L" eight consecutive
samples, this pin outputs "L". Input when LKIN="H".
65
XV
DD
−
Power supply for master clock
26
MDP
O
Servo control output of spindle motor
66
XTAI
I
Crystal oscillation circuit input
Input the external master clock via this pin.
27
SSTP
I
Detection signal input of disc innermost
67
XTAO
O
Crystal oscillation circuit output
28
SFDR
O
Sled drive output
68
XV
SS
−
GND for master clock
29
SRDR
O
69
AV
DD
1
−
Analog power supply
30
TFDR
O
Tracking drive output
70
AOUT1
O
L ch analog output
31
TRDR
O
71
AIN1
I
L ch OP amp. input
32
FFDR
O
Focus drive output
72
LOUT1
O
L ch LINE output
33
FRDR
O
73
AV
SS
1
−
Analog GND
34
V
SS
−
Digital GND
74
AV
SS
2
−
Analog GND
35
TEST
I
TEST pin : normally GND
75
LOUT2
O
R ch LINE output
36
TEST
I
76
AIN2
I
R ch OP amp. input
37
XTSL
I
Crystal selector input
"L":16.9344MHz , "H":33.8688MHz
77
AOUT2
O
R ch analog output
38
VC
I
Center voltage input
78
AV
DD
2
−
Analog power supply
39
FE
I
Focus error signal input
79
RMUT
O
R ch zero detection flag
40
SE
I
Sled error signal input
80
LMUT
O
L ch zero detection flag
•
Pin Function
Notes)
• PCMD is an MSB first. two's complement output.
• GTOP is used to monitor the frame sync protection status. (High:sync protection window released)
• XUGF is the negative pulse for the frame sync derived from the EFM signal. It is the signal before sync protection.
• XPLCK is the inverse of the EFM PLL clock. The PLL is designed so that the falling edge of XPLCK and the EFM signal transition point coincide.
• GFS goes high when the frame sync and the insertion protection timing match.
• RFCK is derived with the crystal accuracy. This signal has a cycle of 136
µ
s.
• C2PO represents the data error status.
• XRAOF is generated when the 16K RAM exceeds the
±
4F jitter margin.
