tza1020 NXP Semiconductors, tza1020 Datasheet - Page 13

• Manufacturer Part Number: tza1020
• Description: Pre-amplifiers For Cd-rw Systems
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.1.9
Table 18 Control bits for ppnctrl control via 5-bit DAC
Table 19 Control bits for ppnscl control via 5-bit DAC; note 1
Note
1. The currents of all DACs is controlled by reference current (I
8.1.10
Table 20 Control bits for porr
Note
1. When porr is set to logic 1 it ensures that the POR read bit is reset to logic 0. This way a reading of POR is always
2000 Oct 30
Pre-amplifiers for CD-RW systems
ppnscl4
at logic 1 with the occurrence of an actual power-on I
other I
I
I
logic 1, also when this state is set via the I
state it forces a reset to logic 0 of the POR bit independent of other bit settings.
2
2
C-bus register content from the POR state. Bit POR of the read byte is a wired NOR function that checks all
C-bus register bits: when the I
0
0
0
1
1
1
C
C
2
ONTROL BYTE SUBADDRESS
ONTROL BYTE SUBADDRESS
C-bus control bits. Bit porr has no control function; it is an ‘unused’ bit dedicated by name to change the
ppnctrl1
porr
1
0
1
0
1
ppnscl3
0
0
0
1
1
1
ppnscl2
2
C-bus register contents equals the Power-on reset default state POR will read
code
06
07
0
0
0
1
1
1
:
2
C-bus control. Because a setting of porr = 1 differs from the POR default
ppnscl1
POR reset
1
0
1
1
0
0
ppnctrl0
MODE
note 1
2
C-bus register reset and cannot accidentally be caused by
13
1
0
1
RREF
ppnscl0
). The given currents are valid at I
0
1
0
1
0
1
POR state
integrator slow disabled
integrator slow enabled
integrator fast disabled
integrator fast enabled
reset of POR signal bit
TZA1020; TZA1020A
CURRENT ppnscl-DAC
100
DESCRIPTION
DESCRIPTION
93.750 A
96.900 A
6.250 A
9.375 A
3.125 A
100 A
(code + 1)/32
Product specification
:
RREF
= 900 A.