AN8725FH Datasheet, PDF (3/36 Pages) Panasonic Semiconductor – Semiconductor laser power control IC

ICs for Optical Disk Drive
AN8725FH
s Pin Descriptions
Note) Description on notations of "Category" in the following list:
IN : Input pin
I/O : Input/output pin (pull-down with 100 k Ω)
IND : Input pin (pull-down with 100 kΩ) PS : Power supply/GND pin
INU : Input pin (pull-up with 100 kΩ)
MSC : Parts connecting pin, etc.
OUT: Output pin
A: Analog function
D: Digital function
Pin No.
1
Symbol
SGND
2
DGND
3
DGND
Category
PS D
PS D
PS D
Description
Pin connected to the chip substrate.
Must be used in the same potential as other GND pins.
GND pin exclusive for a logic circuit.
Must be used in the same potential as other GND pins.
4
PKMD IND D Peak current modulation signal input pin.
In high-level, the current set up with DAC2 is superimposed on LD.
5
BIMD IND D Bias current modulation signal input pin.
In high-level, the current set up with DAC3 is superimposed on LD.
6
RPHOLD IND D Record gate signal input pin.
Inputs a low-level in playback and a high-level in recording.
Switches an amp. of light monitoring signal, abnormally emitted light
detection level and on/off of HF module.
7
XWR INU D Register writing signal pin.
Selects a register specified by address in a fall edge and writes a bus data
on the register of the address specified in the rise edge.
8
XRD INU D Register read-out signal pin.
Register data of the address specified in low appears on the bus.
9
DV_CC
PS
D Power supply pin exclusive for a logic circuit.
Must be used in the same potential as other power supply pins.
10
DGND PS D GND pin exclusive for a logic circuit.
Must be used in the same potential as other GND pins.
11
AD0 IND D 4-bit address pin for registers.
12
AD1 IND D Selects the register to be accessed.
13
AD2 IND D
14
AD3 IND D
15
DT0
I/O D Data I/O 8-bit bus pin.
16
DT1
I/O D The bus to set the data to be written on a register and to read out the data
17
DT2
I/O D of a register.
18
DT3
I/O D
19
DGND PS D GND pin exclusive for a logic circuit.
Must be used in the same potential as other GND pins.
3