Si9993CS

Vishay Siliconix

FaxBack 408-970-5600, request 70653

S-60752–Rev. A, 05-Apr-99

www.siliconix.com

7

PIN CONFIGURATION

PIN DESCRIPTION

Pin No.

Name

Type

Function

1

RESETVCM

Digital, Input

Direct RESET to bit D6 of REG0. Force head retract sequence if in normal

operation.

2

HS-

Analog, Output

Connection to gate of negative VCM high-side driver

3

LS-

Analog, Output

Connection to gate of negative VCM low-side driver

4

PGATE

Analog, Output

Connection to gate of external PMOSFET used to isolate VCLAMP during

emergency head retract.

5

HSA

Analog, Output

Connection to gate of spindle 0-A high-side driver

6

LSA

Analog, Output

Connection to gate of spindle 0-A low-side driver

7

HSB

Analog, Output

Connection to gate of spindle 0-B high-side driver

8

LSB

Analog, Output

Connection to gate of spindle 0-B low-side driver

9

HSC

Analog, Output

Connection to gate of spindle 0-C high-side driver

10

LSC

Analog, Output

Connection to gate of spindle 0-C low-side driver

11

IPDATA

Digital, I/O

Bi-directional data path for the serial port

12, 13, 14, 25,

26, 34, 35, 36,

58, 64

GND

Supply

Chip substrate ground

15

IPENABLE

Digital, Input

Strobe input for data word. System commands are executed at the falling edge of

IPENABLE.

16

IPCLK

Digital, Input

Clock input for the serial port

17

PWMOUT

Digital, Output

Digital output of stand-alone PWM driver