TZA1032UK Philips Semiconductors, TZA1032UK Datasheet - Page 13

• Manufacturer Part Number: TZA1032UK
• Description: Laser driver and controller circuit
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 4 Truth table for RLC differential receiver; note 1
Note
1. X = don’t care; L = LOW; H = HIGH.
7.6
The RLC decoder and write strategy generator feature a look back function to enable write pre-compensation by data
dependent write strategies. The write strategy for the current received run length (rlc
run length (rlc
including a read state.
The read state is entered after detecting run lengths 16. The decoder automatically toggles between the status write
and erase in normal writing mode, and the RLC data inputs can be made edge sensitive only, or edge and level sensitive.
It should be noticed that erase strategies are possible. A forced erase mode can be entered via I
initialisation. The RLC decoder (and the complete TZA1032) have a fixed propagation delay of 28 RLC clock periods to
allow accurate data linking on disc.
Table 5 List of possible RLC decoder combinations; note 1
Note
1. X = don’t care; E = erase; W = write.
2002 May 06
CLKP
CLKN
X
X
X
X
Read
rlc
Laser driver and controller circuit
CLOCK
E1
E2
E3
E3
E3
E3
E4
E4
E4
E4
E5
E5
E5
E6
E7
INPUT
n
The RLC decoder
rlc
W3
W4
W5
W3
W4
W5
W3
W4
X
X
X
X
X
X
X
X
n 1
n 1
POWER-DOWN
). Table 5 shows that TZA1032 is capable of decoding 64 possible combinations of rlc
EFFECT
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
H
L
L
L
L
L
E10
E11
E12
E13
E14
E15
rlc
W1
W1
W1
W1
W1
W1
W2
W2
E8
E9
n
High_Z
rlc
H
X
X
X
L
L
E1
E2
E3
E4
E5
E1
E2
X
X
X
X
X
X
X
X
X
n 1
EFFECT
High_Z_clk
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
X
X
H
X
L
L
13
rlc
W2
W2
W2
W2
W3
W3
W3
W3
W3
W3
W4
W4
W4
W4
W4
W4
n
Reset
H
H
H
X
X
X
rlc
E3
E4
E5
E1
E2
E3
E4
E5
E1
E2
E3
E4
E5
X
X
X
n 1
OUT
H
H
H
H
H
L
EFFECT
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
n
) depends on the previous received
BIAS
on
on
off
on
on
on
W10
W11
W12
W13
W14
W15
rlc
W5
W5
W5
W5
W5
W5
W6
W7
W8
W9
closed
closed
open (high impedance)
open (high impedance)
open (high impedance)
open (high impedance)
n
Preliminary specification
2
C-bus for quick disc
INPUT SWITCH
rlc
E1
E2
E3
E4
E5
X
X
X
X
X
X
X
X
X
X
X
n 1
TZA1032
n
and rlc
EFFECT
n 1
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63