Phytec miniMODUL-537, Hardware Manual

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miniMODUL-537
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PHYTEC Meßtechnik GmbH 2001 L-006e_2
A53 RS-DIS RS-232-Disable
Input active LOW. This signal is used to turn-off the RS-232 driver
chip and can also be applied for sensitive applications to reduce the
current.
B27 B0 Bank-Select 0
B28 B1 Bank-Select 1
Inputs:If a 128 kByte-RAM is installed in U13 the highest address bits
are provided and can be connected with the appropriate port
connections.
A39 PFI Power-Fail-Input
A38 /PFO Power-Fail-Output
Input: This signal can be used to recognize beginning power failures of
the power supply. The output /PFO can be utilized to create an
interrupt.
A69 /WDP Watchdog-Pulse
A35 /WDO Watchdog-Output
/WDP is an input. Cyclic signal alterations within one second at /WDP
don’t trigger a RESET. The failing of these pulses entails a RESET
and a signal at output /WDO. /WDP should be open if not used.
B54 /PE Power-Down_Enable, Start_Watchdog
The input is already connected with GND and influences the control-
ler-internal watchdog-timer and blocks the power-down-mode. Please
read the controller manual from INFINEON for more information. If
this input should be connected externally, cut the connection at J4.