User`s guide

4-34 Intel
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StrongARM
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SA-1110 Microprocessor Development Board User’s Guide
Hardware Considerations
4.13.1 CDMA Radio Module
The SA-1110 Development Board provides primary support for a CDMA radio module. A 30-pin
header provides a serial port interface, analog audio input and output, radio control signals and
interrupts with a high-power 5.5 V rail. The SA-1110 serial port 3 is used to communicate with the
radio modules. CDMA AT modem commands are issued over this interface and data packets are
transmitted and received.
4.13.2 GSM Radio Module
Secondary support is provided for a GSM radio module, and requires an adapter header or board.
This adapter board must also provide a socket for a smart card component required by GSM.
Most radio control signals are shared with the CDMA interface. An SA-1110 Development Board
jumper option allows changing the power feed from the 3.6 V raw battery required by the GSM
module.
Note: The GSM adapter module is not available for Phase 4.
4.13.3 Bluetooth Radio Module
At the time of this writing, formal Bluetooth interface specifications were not available. However,
specification details for the 30-pin radio header on the SA-1110 Development Board should
provide all the signal and power data necessary to interface a serial Bluetooth board. The
SA-1110 Development Board jumpers allow switching of the radio header serial port from serial
port 3 to serial port 1, which is capable of up to 1.5 Mb data rates.
4.14 Quiet Alert Motor
The SA-1110 Development Board includes a quiet alert motor activation circuit that, when
enabled, produces a vibration instead of sound. Most phones and pagers and many PDAs include
this type of alert. Vib_On, which is bit 15 in the BCR, controls an MIC2514 switch that drives the
micro motor with its eccentric wobble weight.
System boot code must initialize the BCR very early in the power up code to prevent this motor
from running after a cold start. The use of the motor should be limited to short bursts to conserve
battery charge.
4.15 IrDA Infra-red Communications
The SA-1110 Development Board includes a IrDA port and transceiver that is capable of up to
4 Mb/s communications. The Hewlett-Packard IrDA transceiver is controlled from IRDA_FSEL
(bit 3) and IRDA_MD[1:0] (bits 5:4) in the BCR for frequency, range, and power selections.