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1998 Feb 16 24
Philips Semiconductors Product specification
CMOS digital decoding IC with RAM for
Compact Disc
SAA7345
Versatile pins interface
The SAA7345 has five pins that can be reconfigured for different applications as shown in Table 10.
Table 10 Versatile pins
SYMBOL PIN TYPE
CONTROL
REGISTER
ADDRESS
CONTROL
REGISTER
DATA
FUNCTION
V1 3 input 1 1 0 0 X X X 1 off-track input (from digital servo)
X X X 0 input may be read via status register
(address 0010 data X101)
V2 4 input −−input may be read via status register
(address 0010 data X110)
V3 26 output 1 1 0 0 X X 0 X kill output for right channel
X 0 1 X output = logic 0
X 1 1 X output = logic 1
V4 25 output 1 1 0 1 0 0 0 0 4-line motor drive (using V4 and V5)
X X 0 1 Q-to-W subcode output
X X 1 0 output = logic 0
X X 1 1 output = logic 1
V5 24 output 1 1 0 1 0 1 X X de-emphasis output (active HIGH)
1 0 X X output = logic 0
1 1 X X output = logic 1
Fig.21 Motor servo mode diagram.
MGA362 - 2
G
f
4
fBW
3
f