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C141-E069-02EN 4 - 19
POS
C
PAD
POS
D
POS
B
POS
A
2.85 µs0.45 µs2.80 µs
Write/read
Recovery
1.80 µs
1.80 µs1.80 µs1.80 µs
0.60 µs
Gray Code
SMK1 SMK2
0.60 µs
Servo
Frame
DATA
DATA
DATA
Servo
Frame
115.7 µs
14.50 µs
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.