IC401 (TC90A41AF) : DVD DSP (Digital Signal Processing ) & DVD Spindle
Servo
It receives the DVD RF From IC201 (TA1254F), works data slice, and transfer data to IC701
(TC6817F) with ECC.
It outputs PWM signal used in spindle Servo from Pin 52 to control the spindle servo in DVD mode.
Block Diagram
1
5
10
15
20
25
DPCKI
DVDD3
SVCKI
SVCKO
DVSS
DVDD3
NC
HDWT
HDRD
HCEN
HD0
HD1
HD2
HD3
HD4
HD5
HD6
HD7
DVSS
DVDD5
HINT
HA0
HA1
PLCK
ED0
55
60
65
70
75
MD3
MD4
MD5
MD6
MD7
DVDD5
DVSS
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
DVDD3
DVSS
MWEN
MOEN
CASN
RASN
DMO
DVR
80
85
90
95
100
MD2
MD1
MD0
SD7
SD6
SD5
SD4
DVSS
DVDD3
SD3
SD2
SD1
SD0
TC90A41
SERR
SBGN
SENB
SDCK
DVSS
SREQ
RSTN
DVDD3
STDA
STCK
UPWM
DVSS
45
50
40
35
30
RVR1
RVSS
RFIN
RVDD
RVR2
AVDD
PVR
VRC
AVR
AVSS
SCLO
VCOF
LPFO
LPFN
RLLD
PDOP
PDON
TEST
ED7
ED6
ED5
ED4
ED3
ED2
ED1
31