Controls and Indicators Interface
40
C24 Module Hardware Description
December 15, 2008
Controls and Indicators Interface
The C24 incorporates several interface signals for controlling and monitoring the module's
operation. The following paragraphs describe these signals and their operation.
Table 2-19
gives a description of the controls and indicators signals.
Reset
The RESET_N output signal indicates the C24's operating status. This signal is set high after
power up, when C24 is operating. It is set low when C24 is powered off.
When the RESET_N signal is low, the C24 interface signals are disabled and do not represent any
valid data or state. Furthermore, any input signals connected to the C24 interface must be
disabled (tri-state) or set low when RESET_N is low.
VREF Reference Regulator
The C24 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 2-19: Controls and Indicators
Connector Pin
Signal Name
Description
25
RESET_N
C24 system reset output indicator.
When high, C24 is operating.
27
VREF
2.80V regulated output.
Supplies external circuits up to
150mA.
26
WKUPO_N
Host application wake-up signal indi-
cator.
41
ANT_DET
Antenna physical connection detect
indicator.
49
CDMA
Network status indicator.
39
TXEN_N
Transmission burst indication.
28, 30, 32, 34, 36,
38, 40, 42
GPIO 1-8
General purpose IO signals for cus-
tomer use.
Содержание 8900 - Blackberry Curve Cell Phone OEM Car Charger
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