User's Manual

Cinterion
®
Java Terminals Hardware Interface Description
4.4 Electrical Specifications of the Application Interface
44
 EHSxT_BGS5T_HID_v02 2014-08-05
Confidential / Preliminary
Page 40 of 70
4.4.4 Weidmueller GPIO Interface
Table 21: Weidmueller GPIO interface specifications (requirements)
Function Signal name IO Signal form and level Comment
8-pin, 12-
pin connec-
tors for:
GPIO,
Power,
I
2
C and
ASC1, SPI,
RS-485
GPIO 6-8
GPIO 11-15
GPIO 20-21
IO V
OL
max = 0.1V at I = 100µA
V
OL
max = 0.55V at I = 32mA
V
OH
min = VCCref - 0.1V at I = 100µA
V
OH
min = VCCref - 0.4V at I < 12mA
V
OH
min = VCCref - 0.7V at I < 32mA
V
IL
max = 0.3 * VCCref
V
IH
min = 0.7 * VCCref
If unused keep lines
open.
Please note that some
GPIO lines are or can be
configured for functions
other than GPIO:
GPIO6/GPIO7: PWM
GPIO8: Pulse Counter
VCCref I Vimax = 5.5V
Vimin = 1.8V
GND -- --
TXD1/
SPI_MISO
IV
OL
max = 0.1V at I = 100µA
V
OL
max = 0.55V at I = 32mA
V
OH
min = VCCref - 0.1V at I = 100µA
V
OH
min = VCCref - 0.4V at I < 12mA
V
OH
min = VCCref - 0.7V at I < 32mA
V
IL
max = 0.3 * VCCref
V
IH
min = 0.7 * VCCref
If unused keep lines
open.
SPI interface is not avail-
able for BGS5.
RXD1/
SPI_MOSI
O
CTS1/A+/
SPI_CS
O
RTS1/B- I
+5Vout O 5V, +0.05V, -0.2V
Ioutmax = 100mA
Regulated output for
external supply. Can be
connected to VCCref.
If unused, keep open.
DSR0/
ADC1_IN
(Analog-to-
Digital con-
verter)/
SPI_CLK
IR
I
= 1M
V
Imax
= 0V...VCCref + 0.3V
Valid range 0V…5V
Resolution 1024 steps
Tolerance 0.3%
ADC1_IN can be used as
input for external mea-
surements.
If unused keep line open.
I2CDAT IO Open drain IO
V
OL
min = 0.3V at I = -3mA
V
OH
max = VCCref
Rpullup = 2.2kOhm
V
IL
max = 0.35V
V
IH
min = 1.3V
V
IH
max = 1.85V
According to the I
2
C Bus
Specification Version 2.1
for the fast mode a rise
time of max. 300ns is per-
mitted. There is also a
maximum V
OL
=0.4V at
3mA specified.
The value of the pull-up
depends on the capactive
load of the whole system
(I
2
C Slave + lines). The
maximum sink current of
I2CDAT and I2CCLK is
4mA.
If unused keep lines
open.
I2CCLK IO