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 100k
Ω
resistor to define default input status and
a 33
Ω
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