Digilent DXC95 Справочное руководство - Страница 3

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Digilab XC95 Reference Manual
Pin 13
Pin 25
DB25 parallel port connector
Front view
Pin 25
Top view of hole pattern, with
cable attaching from this side
Pull-up resistors are used on all parallel
port signals. They are not shown here.
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
DB25
connector
GND
Program port
switch (SW1)
GND
Rev: May 7, 2002
Pin 1
Pin 14
Pin 1
Figure 1. Parallel port connectors and signals
PD0
PD1
PD2
PD3
PD6
PWT
PPO
PSEL
GND
EXT
Vdd
Figure 2. Parallel port and programming circuit schematic
INT
www.digilentinc.com
Pin
EPP signal
1
Write Enable (O)
2-9
Data bus (B)
10
Interrupt (I)
11
Wait (I)
12
Spare
13
Spare
14
Data Strobe (O)
15
Spare
16
Reset (O)
17
Address strobe (O)
18-25
GND
Three
state
buffer
EN
Three
state
buffer
EN
TDO
Cable detect
Cable detect
Digilent, Inc.
EPP Function
Low for read, High for write
Bidirectional data lines
Interrupt/acknowledge input
Bus handshake; low to ack
NOT CONNECTED
NOT CONNECTED
Low when data valid
NOT CONNECTED
Low to reset
Low when address valid
System ground
TCK
P30
TDI
P28
TDO_I
TMS
P29
P59
Xilinx 95108
CPLD
TMS
P33
TDI
P35
TDO_E
TCK
P39
P37
F expansion
connector
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