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3.2.5.8
PS/2 interface signals (Connector X3 - CN8)
The LPC Super I/O Nuvoton W83627DHG manages also a PS/2 interface, which is available on connector X3 - CN8.
Here following the signals related to PS/2 interface:
KBDAT: PS/2 Keyboard Data, +5V_A bidirectional signal with 4K7Ω pull-up resistor.
KBCLK: PS/2 Keyboard Clock, +5V_A bidirectional signal with 4K7Ω pull-up resistor.
MSDAT: PS/2 Mouse Data, +5V_A bidirectional signal with 4K7Ω pull-up resistor.
MSCLK: PS/2 Mouse Clock, +5V_A bidirectional signal with 4K7Ω pull-up resistor.
3.2.5.9
Parallel port /Floppy Disk interface signals (Connector X3 - CN8)
®
According to ETX
Rel. 3.0 specifications, the ETX-A61 module offers also a Parallel Port interface. The pins used for this interface are also shared with Floppy Disk
Controller interface. Both these interfaces are managed by the LPC Super I/O Nuvoton W83627DHG.
Selection between these two interfaces is made using signal LPT/FLPY#, which is a +3.3V_S input with 10KΩ pull-up resistor. When this signal is high (or not
driven), then Parallel Port interface is available. Instead, when the signal is low, then Floppy Disk Interface will be available
Parallel Port mode signals:
STB# Strobe, active-low open drain output. This signal is used to let the printer to latch the data available on parallel data bus.
AFD#: AutoFeed, active low open drain output. This signal commands to the printer to add automatically a line after that one line has been printed.
PD[0..7]: 8-bit bidirectional parallel data bus, TTL level. It is used to transfer data between the CPU and the printer.
ERR#: Error, active-low input, TTL level. This signals reports that an error has occurred with the printer.
INIT#: Initialization, active-low open drain output. When asserted, this signal commands the initialization of the printer.
SLIN#: Selection, active-low open drain output. It is used to select the printer
ACK#: Acknowledge, active-low input, TTL level. When this signal is asserted, it means that the printer and received all previous data and it is ready to receive new
data.
BUSY: Busy input, TTL level. This signal reports that the printer is not ready to receive new data.
PE: Paper End, TTL level input. It is used to signal to the CPU that the printer ran out of paper.
SLCT: Select, TTL level input. When this signal is high (asserted), it reports that the printer is on and it has been selected.
Floppy Disk Mode signals:
DENSEL: Drive Density Select, open drain output. It is used to enable low density operations (250Kbps/300Kbps) or high density operations (500Kbps/1000Kbs).
ETX-A61
ETX-A61 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.2 - Author: S.B. - Reviewed by G.G. Copyright © 2017 SECO S.r.l.
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