User's Manual

Page 151
8.4 Auxiliary I nterfac e
INTERFACE ELECTRIC SPECIFICATION.
Connector : MOLEX 51022-0500 (5 pins) terminal used: 50061 (Board-in type)
Pin Name Function
8.4.1 What is Auxiliary Inte rface
A via-hole for a 5-pin connector for auxiliary functions is available, which you can use
according to the user’s requirement. Pin 3 to 5 can be used to monitor the internal status
using the 3-wire serial communication. Board-in connector which can be inserted into the
ia-hole is listed below. v
For electric specification, see p.145
1 /TxOn ‘L’ at transmission
2 Div/-Main
Selects the receiving antenna, ‘H’ on
the diversity side.
3 Status-Data
Outputs the serial data to monitor the
internal status.
4 Status-Clock
Outputs the serial clock to monitor
the internal status.
5 Status-Load
Output the serial load-enable to
monitor the internal status.
Table C–1: Auxiliary Interface Pin Descriptions
8.4.2 Serial Comm unicat ion Se tting
The clock rate of the serial signal output from the AUX interface can be changed with the
memory register, REG27:bit 5 and 4. The serial signal is not output by the default setting.
the status monitor circuit operates at the clock rate set by memory register and the serial-
clock of the AUX interface pin 4 is output at a half of the set rate.
Among monitoring status, there are high-speed one-shot signals. Which require high speed
serial-clock to sufficiently sample and output the status. Since higher clock rate results higher
current consumption, its rate can be controlled by the following parameters. To realize the
operation at lowest current consumption, use the default parameter which does not output
any serial clock.
REG 27
Bit 5 Bit 4
Setting
0 0 No clock output (default)
0 1 100 KHz
1 0 1.14 MHz
1 1 8 MHz
Table C–2: Clock rate of status monitor circuit
Futaba Corporation Rev. 020323-01