– 4 –

CXP402

Pin Description

Symbol

I/O

Description

(Port A)

4-bit I/O port. I/O can be set in a unit of single bits. Pull-up resistor is

attached for input. (4 pins)

(Port B)

4-bit I/O port. I/O can be set in a unit of single bits. Pull-up resistor is

attached for input. (4 pins)

(Port C)

4-bit I/O port. I/O can be set in a unit of single bits. Pull-up resistor is

attached for input. (4 pins)

LCD segment signal output. (16 pins)

LCD common signal output.

LCD bias power supply. Bias voltage is generated, which is 1/3 the

supply voltage due to the internal resistor. (3 pins)

SENS input from SSP.

Track jump count signal input.

Serial data output to SSP.

Serial data latch output to SSP.

Serial clock output to SSP.

Spindle motor ON/OFF control output.

Spindle motor servo control. (2 pins)

Lock signal output. GFS is sampled at 460Hz and; when GFS is high,

this pin outputs a high signal. If GFS is low eight convective samples,

this pin outputs low.

Wide-band EFM PLL charge pump output. (2 pins)

Wide-band EFM PLL VCO2 oscillation input.

Wide-band EFM PLL VCO2 oscillation output.

Wide-band EFM PLL VCO2 control voltage input.

Master PLL charge pump output.

Master PLL filter input.

Master PLL filter output.

Master VCO control voltage input.

EFM signal input.

Asymmetry circuit constant current input.

Asymmetry comparator voltage input.

EFM output. (full swing)

System reset input. Active at low.

I/O

I/O

I/O

Output

Output

Input

Input

Output

Output

Output

Output

Output

(tri-state)

Output

Output

(tri-state)

Input

Output

Input

Output (tri-state)

Input

Output (Analog)

Input

Input

Input

Input

Output

Input

PA0 to PA3

PB0 to PB3

PC0 to PC3

SEG0 to SEG15

COM0 to COM3

SEIN

CNIN

DATO

XLTO

CLKO

MON

MDP

MDS

LOCK

VPCO1

VPCO2

VCKI

V16M

VCTL

PCO

FILI

FILO

CLTV

RF

BIAS

ASYI

ASYO

XRST