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Interface pinouts and interrupts
Connector X809: Loudspeaker
1 4
Pin
Meaning
1
SPEAKER_OUT_L
2
free
3
coded
4
+ 5 V via 33 Ohm-R
Connector X810: Control signals for power
supply
1
5 10
6
Pin
Signal
1
free
2
SOFT_OFF_PRSNT_L
3
free
4
DRIVES_OFF_L
5
free
6
free
7
MONITOR_OFF_L
8
POWER_OFF_L
9
free
10
0 V
A26361-D808-Z121-1-7619
33
Interface pinouts, interrupts and DMA
Parallel interface
1
13
25
14
The parallel interface supports three transfer modes: SPP, EPP and ECP. SPP
mode (standard parallel port) is the mode traditionally used to drive a printer. The
EPP (Enhanced Parallel Port) and ECP (Extended Capabilities Port) modes are
transfer modes that allow transfer rates of 2 and 2.4 Mbytes/s. These modes will
only work in connection with peripheral devices which specifically support them.
The new transfer modes are used among other things for connecting to SCSI or
IDE peripherals. The pinouts are different in all three modes.
Pinout in SPP mode
Pin
Signal
name
Description
1
STROBE
Data message
2 - 9
Data Lines 0-7
Data lines 0-7
10
ACKNOWLEDGE
Data
acknowledgement
11
BUSY
Not ready to receive
12
PE
End of paper
13
SELECT
Device
selection
14
AUTO
Automatic new line
15
ERROR
Device
error
16
INIT
Reset/initialize
17
SELECT IN
Printer selection
18 - 25
GROUND
Ground
34
A26361-D808-Z121-1-7619