FUJITSU MPD3XXXAT User Manual
Page 64
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C141-E069-02EN
4 - 19
POS
C
PAD
POS
D
POS
B
POS
A
2.85
µ
s
0.45
µ
s
2.80
µ
s
Write/read
Recovery
1.80
µ
s
1.80
µ
s
1.80
µ
s
1.80
µ
s
0.60
µ
s
Gray Code
SMK1
SMK2
0.60
µ
s
Servo
Frame
DATA
DATA
DATA
Servo
Frame
115.7
µ
s
14.50
µ
s
Figure 4.7
Servo frame format
(1)
Write/read recovery
This area is used to absorb the write/read transient and to stabilize the AGC.
(2)
Servo mark (SMK1, SMK2)
This area generates a timing for demodulating the gray code and position-demodulating Pos A
to D by detecting the servo mark.
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