Preliminary Technical Information

AD6426

This Information applies to a product under development. Its characteristics and specifications are subject to change without notice. Analog Devices assumes no

obligation regarding future manufacture unless otherwise agreed to in writing. No responsibility is assumed by Analog Devices for its use; nor for any

infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent

rights of Analog Devices.

Revision Preliminary 2.3 (June 9, ´98)

- 4 -

Confidential Information

PIN FUNCTIONALITY ( Normal Mode)

Group

Pin Name

Pins

I/O

Default / Alternative Function(s) *

General

CLKIN

1

I

13 MHz Clock Input

RESET

1

I

Reset input

IRQ6

1

I / I

Interrupt Request # 6 / Non-Maskable Interrupt (NMI) *

OSC13MON

1

O

13 MHz Oscillator Power Control Signal

BOOTCODE

1

I

Boot Code Enable

VDD

10

Supply Voltage

GND

10

Ground

Memory

ADD19 : 0

20

O

Processor Address Bus

Interface

GPO10

1

O / O

General Purpose Output 10 / Address (20) *

DATA15 : 0

16

I/O

Processor Data Bus

RD

1

O

Processor Read Strobe

HWR

1

O

Processor High Write Strobe / Upper Byte Strobe

LWR

1

O

Processor Low Write Strobe / Lower Byte Strobe

WR

1

O

Processor Write Strobe

FLASHPWD

1

O / I /

O

FLASH Power Down / WAIT / General Purpose Output

11*

RAMCS

1

O

External RAM Chip Select

ROMCS

1

O

External ROM Chip Select

SIM

SIMCARD

1

I /

I/O

SIM Card Detect / General Purpose I/O 16 *

Interface

SIMDATAOP

1

O

SIM Data Output

SIMDATAIP

1

I

SIM Data Input

SIMCLK

1

O

SIM Clock

SIMRESET

1

O

SIM Reset

SIMPROG

1

O /

I/O

SIM Program Enable / General Purpose I/O 15 *

SIMSUPPLY

1

O

SIM Supply Enable

EEPRROM

EEPROMDATA

1

I/O

EEPROM Data

Interface

EEPROMCLK

1

O

EEPROM Clock / High Speed Logger Clock

EEPROMEN

1

O

EEPROM Enable / High Speed Logger Frame Sync

Display /

DISPLAYCS

1

O

Display Controller Chip Select / Chip Enable

Backlight /

LCDCTL

1

O

LCD Control / Serial Display Data Output

Keypad

BACKLIGHT

1

O

Backlight Control

Interface

KEYPADROW5 : 0

6

I

Keypad Row Inputs

KEYPADCOL3 : 0

4

O

Keypad Column Strobes (open drain, pull low)

* Note: Functionality of these pins can be changed under software control.