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13

Oki Semiconductor

General Signals

Test

TEST mode is activated when HRST and PST2 are both active low (an illegal state) in normal operation.

The MSM7712 operates normally when TEST is not asserted. When asserted, the following test modes

are selected using processor data pins PD[1:0].

MODEM SPECIFICATION

The following two subsections describe modulator and demodulator specifications.

Modulator

The MSM7712 features an internal digital 24 MHz IF CP-FSK modulator. There are two modes of modu-

lator operation:

• 1 Mbit/s, 2-ary CP-FSK

• 2 Mbit/s, 4-ary CP-FSK

Deviations can be set independently for both modes. Modes switch phase continuously in a single clock

cycle.

where N=0.63.

Digital on/off ramping from 0 ~ 24

µs of the modulator output power may be added under register con-

trol

General Signal Descriptions

Pin Name

Direction

Description

SCK

Input

The system clock to the MSM7712 is provided by this pin. The clock must always be active (i.e. when reset is

asserted). The WLAN card operates synchronously to this clock.

The MSM7712 and radio operate at SCK/2. The internal modem operates at SCK (32 MHz).

The processor operates from a division of SCK (divide by 1 to divide by 8) depending on a register

(GLOB_CTL, see Programmers Reference) in the MSM7712. This signal is output as PCK.

VCSS, VPSS

Power

These pins serve as ground for the core logic and I/O pads.

VCDD

Power

This pin serves as power to the core at 3-V nominal.

VPDD

Power

These pins serve as power to I/O pads and can either be 3-V or 5-V nominal.

Test Select Options

PD[1]

PD[0]

Test

Description

0

0

Scan

Internal manufacturing scan test providing greater than 95% fault coverage. The scan select pin is PST0.

0

1

Hi-Z

All output pins are set to high impedance. This test allows external tester to drive MSM7712GS-K pins.

1

0

PinConn

All bidirectional, 3-state (except processor) and output pins are set to output and input pins determine state

of output pins. This test ensures connectivity of the MSM7712G-K to the PCB

1

1

Reserved