3

MITSUBISHI LINEAR IC’s

M35502AFP

FLD CONTROLLER

Table 1 Pin description

Function

• Applies voltage supplied to pull-down resistors.

• Connect an external capacitor to this pin.

• Serial transfer is possible by inputting “L” signal.

• Pull-up resistor is built in.

• Clock for serial transfer is input.

• Read a clock twice with 2 MHz sampling clock and judge if it is a noise or not.

• Serial data is input/output.

• In input mode, read a clock twice with 2 MHz sampling clock and judge if it is a

noise or not.

• Pin for ordinary output or digit output.

• Pin for digit output or segment output.

Output

N-channel

open-drain

P-channel

open-drain

P-channel

open-drain

Pin

OSC

____

CS

Name

Power source

Pull-down

power source

Clock input

Chip select

Serial clock

Serial input/

output

Digit/Port

Segment/Digit

Input

Input

CMOS input

CMOS input

Noise filter

CMOS input

Noise filter

PORT BLOCK

Fig.3 Port block diagram

PIN DESCRIPTION

(2) Segmen/Digit pin

Segment/Digit data

(1) Digit/Port pin

Data bus

Latch

Dimmer signal

(Note)

V

Digit data

V High-breakdown-voltage P-channel transistor

Note: Dimmer signal is for setting the Toff time.

A-D conversion input

(6) A-D input

Serial clock input

Noise filter

Serial output

Serial input

CS input

(4) CS pin

Noise filter

Dimmer signal

(Note)

Latch

V