AX2061

www.onsemi.com

2

Table 1. PIN FUNCTION DESCRIPTIONS

Symbol

Number of Pins

Type

Description

COM0−4

5

A

Row driver outputs

SEG0−75

76

A

Segment driver outputs

SEL

1

I

SPI select

CLK

1

I

SPI clock

MISO

1

O

SPI data output

Can optionally be connected to read back register contents from the AX2061.

Reading registers is not required for the AX2061 functionality.

MOSI

1

I

SPI data input

LATCH

1

I/O

Latch pixel data into pixel latches

For alternative functionalities as well as required handling if not used see the

circuit description section

SYSCLK

1

I/O

32 kHz clock input (default)

For alternative functionalities as well as required handling if not used see the

circuit description section

ICLK

1

I/O

Internal 32 kHz clock output

For alternative functionalities as well as required handling if not used see the

circuit description section

RREF

1

A

Reference resistor for internal 32kHz oscillator

Connect 1 MW from RREF pin to VSS

Note that the reference resistor is required even if the internal 32 kHz oscillator is

not used to generate the framing clock

VD1

2

A

Decoupling output for internally generated LCD voltage VD1

Connect 100 nF capacitor from VD1 to VSS

VD2

2

A

Decoupling output for internally generated LCD voltage VD2

Connect 220 nF capacitor from VD2 to VSS

VD3

2

A

Decoupling output for internally generated LCD voltage VD3

Connect 100 nF capacitor from VD3 to VSS

VI

2

A

Decoupling output for internal charge pump

Connect 1 mF capacitor from VI to VSS, note that voltage levels on this pin can

reach up to 5.2 V

VDD

2

P

Supply voltage input

VDDCORE

2

A

Decoupling output for internally generated supply voltage for the core functionality

of the IC

Connect 1 mF capacitor from VDDCORE to VSS

CAPN

2

A

Charge pump floating capacitor negative terminal

Connect 100 nF capacitor between CAPN and CAPP

CAPP

2

A

Charge pump floating capacitor positive terminal

Connect 1 mF capacitor between CAPN and CAPP

VSS

10

P

Ground

TST

1

N

Pin used for production testing, leave unconnected

Total

116

A = analog input

I = digital input signal

O = digital output signal

I/O = digital input/output signal

N = not to be connected

P = power or ground

All digital inputs are Schmitt trigger inputs, digital input

and output levels are LVCMOS/LVTTL compatible and 5 V

tolerant.