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Control And Indicators Interface; Reset; Vref Reference Regulator - Motorola C24 CDMA 1X Hardware Interface Manual

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Applicant: Motorola, INC

2.10 Control and Indicators Interface

The module incorporates several interface signals for controlling and monitoring its operation. The
following section describes these signals and their operation.
TABLE 23 – Controls and Indicators
Connector
Signal Name
Pin
25
RESET_N
27
VREF
26
WKUPO_N
41
ANT_DET
49
CDMA
39
TXEN_N
28, 30, 32,
34, 36, 38,
GPIO 1-8
40, 42
2.10.1

Reset

The RESET_N output signal indicates the module's operating status. This signal is set high after power
up, when the module is operating. It is set low when the module is powered off.
When the RESET_N signal is low, the module's application interface signals are disabled and do not
represent any valid data or state. Once the unit is turned-on, this signal must be disabled (high) for all SW
modes (including modes as re-programming, sleep etc.)
2.10.2

VREF Reference Regulator

The module incorporates a regulated voltage output, VREF. The regulator provides a 2.8V output for use
by the customer application. This regulator can source up to 150 mA of current to power any external
digital circuits.
TABLE 24 – VREF Specifications
Parameter
Description
System reset output indicator.
When high, the module is operating.
2.8V regulated output.
Supplies external circuits up to 150mA.
Host application wake-up signal indicator.
Antenna physical connection detect indicator.
Network status indicator.
Transmission burst indication.
General purpose IO signals for customer use.
Conditions
Motorola General Business Use
Page 32 of 36
C24 Hardware Interface Manual
Typ
Max
Min
FCC ID: IHDP56JE1
Version 0.3
Units

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