Preliminary - Information Subject to Change - 9/24/98
5 - 18
EZ-USB Development Board
Figure 5-3: Five 20-Pin Headers
P4 pin 20 is tied to GND on the Anchor
Chips Prototype Board. To avoid a 3.3V
short, this pin is clipped on the EZDB. Do
not connect an HP logic analyzer pod to P4.
*
P4
Male 10x2
hdr
NC
1
3.3V
2
CLK24
3
PB6
5
PB7
4
PB4
7
PB5
6
PB2
9
PB0
11
PB3
8
PA6
13
PA4
15
PB1
10
PA2
17
PA7
12
PA0
19
PA5
14
PA3
16
PA1
18
3.3V*
20
P5
Male 10x2
hdr
3.3V
2
NC
1
PC7
4
PC5
6
nc
3
PC3
8
PC6
5
PC1
10
PB7
12
PC4
7
3.3 V
14
3.3 V
16
PC2
9
3.3 V
18
PC0
11
GND
20
PB6
13
5V
15
SCL
17
SDA
19
P2
Male 10x2
hdr
GND
2
NC
1
GND
4
3.3 V
6
RD#
3
3.3 V
8
PF3
5
3.3 V
10
3.3 V
12
PF2
7
3.3 V
14
3.3 V
16
PF1
9
GND
18
PF0
11
GND
20
PRD#
13
nc
15
CE1#
17
CE2#
19
P3
Male 10x2
hdr
GND
2
NC
1
3.3 v
4
WR#
3
3.3 v
6
GND
8
5V
5
GND
10
RES#
7
D7
12
WU#
9
D5
14
D3
16
BKPT
11
D1
18
D6
13
GND
20
D4
15
D2
17
D0
19
P1
Male 10x2
hdr
GND
2
NC
1
A15
4
A13
6
PSEN
3
A11
8
A14
5
A9
10
A7
12
A12
7
A5
14
A3
16
A10
9
A1
18
A8
11
GND
20
A6
13
A4
15
A2
17
A0
19
