User's Manual

Boomer-III User Manual & Integrator’s Guide_________________________________________________Installation
BM310012WT04 35 Copyright Wavenet Technology © October 2003
Status Signal Multi-Function Lines
The status lines (SS0 to SS4) have multi-functional capability and may
be software configured for specific operation. All the lines may be used
as digital input/outputs. SS0/SS1 and SS2/SS3 may be used as a second
and third serial communications port respectively. SS2-SS3 may be
used to measure analogue input voltages with 10-bit resolution. SS4
may be used as a Synchronous Peripheral Interface (SPI) port chip
select signal (refer to LED Output section later).
Each Status line has a 100kΩ resistor to define default input status and
a 33Ω series resistor for protection. The electrical interface capability,
equivalent circuit and operation of these lines is summarized in the
tables below:
Status Signal Interface Definitions
J1
Pin #
Signal Description
Digital
Capability
Alternate
Function
Other
16 SS0 Status Signal 0 Input/ Output - RXD2
17 SS1 Status Signal 1 Input/ Output AD1 TXD2
18 SS2 Status Signal 2 Input/ Output AD2 RXD3
19 SS3 Status Signal 3 Input/ Output AD3 TXD3
30 SS4 Status Signal 3 Input/ Output SPI_CS -
Status Signal Equivalent Circuits
Status Signal Electrical Characteristics
Parameter Range Low High
Input Voltage 0-3V OR 0-5V
Digital: 0.8 V (max)
Analogue: 0V (min)
Digital: 2.0 V (min)
Analogue: 3V (max)
Output Voltage 0 – 3V 0.4 V (max) 2.5 V (min)
Input Current 100 µA (max) 100 µA (max)
Output Current 4 mA (max) 4 mA (min)
OTHER