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ZEUS Technical Manual Detailed hardware description
© 2007 Eurotech Ltd Issue D 30
Expander 2 - I2C Address 0x22
GPIO Signal name Dir Active Function
Power-up
state
See section…
0 CLK_SHDN# Output Low
Clock Synthesizer
Shutdown
PU
Clock generator power
management
, page 72
1 LVDS_FES# Output Low
LVDS Falling Edge
Strobe
PU
LVDS interface
,
page 47
2 CAN_SHDN Output High
CAN Transceiver
shutdown
PU CAN bus
, page 57
3 U1_RS232_SHDN# Output Low
COM1 RS232
transceiver shutdown
PU
4 U2_RS232_SHDN# Output Low
COM2 RS232
transceiver shutdown
PU
COM Ports power
management
, page 73
5 U3_RS485_SLO# Output Low
COM3 RS485
transceiver slew rate
control
PU
COM3 –
RS232/RS485/RS422
interface
, page 54
6 U4_RS485_SLO# Output Low
COM4 RS485
transceiver slew rate
control
PU
COM4 – RS422/485
interface
, page 55
7 NOT USED PU
8-11 ISS [0-3] Inputs NA PCB Issue Number
12-15 VER [0-3] Inputs NA PCB Version Number