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)

- 6 -

Confidential Information

Pin Functionality ( NORMAL MODE)

Group

Pin Name

Pins

I/O

Default / Alternative Function(s) *

Accessory

GPIO0

1

I/O

General Purpose Inputs/Output 0

Interface

GPIO1

1

I/O

General Purpose Inputs/Output 1 / Radio BANDSELECT1

*

GPIO2

1

I/O

General Purpose Inputs/Output 2 / Radio BANDSELECT0

*

GPIO3

1

I/O

General Purpose Inputs/Outputs 3 / Serial Display Address

Output *

GPIO4

1

I/O

General Purpose Inputs/Outputs 4 / Serial Display Clock

Output *

GPIO5

1

I/O

General Purpose Inputs/Outputs 5 / Battery ID Interface *

GPIO6

1

I/O

General Purpose Inputs/Output 6 / VBIAS *

GPIO7

1

I/O

General Purpose Inputs/Output 7 / Antenna Select *

GPIO8

1

I/O

General Purpose Inputs/Output 8 / DEBUG UART

Transmit Data *

GPIO9

1

I/O

General Purpose Inputs/Output 9 / DEBUG UART

Receive Data *

GPCS

1

O

General Purpose Chip Select

Real Time

OSCIN

1

I

32.768 kHz Crystal Input

Clock

OSCOUT

1

O

32.768 kHz Oscillator Output and Feedback to Crystal

Interface

VDDRTC

1

RTC Supply Voltage

PWRON

1

O

Power ON/OFF Control

Test Interface

JTAGEN

1

I

JTAG Enable

TCK

1

I

JTAG Test Clock / HSL Data 0

TMS

1

I

JTAG Test Mode Select / HSL Data 1 / DAI Reset

TDI

1

I

JTAG Test Data Input / HSL Data 3 / DAI Data 1

TDO

1

O

JTAG Test Data Output / HSL Data 2 / DAI Data 0

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