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USB-EK01 Users Manual (Rev 1.0)
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34
GND
Signal Ground
35
PB2
8051 General Purpose PortB 2
36
PB3
8051 General Purpose PortB 3
37
PB0
8051 General Purpose PortB 0
38
PB1
8051 General Purpose PortB 1
39
3.3V
3.3V Power supply
40
3.3V
3.3V Power Supply
<JP7>
PIN#
Name
Description
1
USB_N
USB D-
2
RST_IN
External Reset Input
3
USB_P
USB D+
4
RESET#
Reset Output (Low Active)
5
DISCON#
USB Disconnection Output (Low Active)
6
PSEN#
Program strobe Enable
7
3.3V
3.3V Power Supply
8
GND
Signal Ground
9
3.3V
3.3V Power Supply
10
CLK24
CPU clock 24Mhz
11
A0
Address Bus 0
12
GND
Signal Ground
13
A2
Address Bus 2
14
A1
Address Bus 1
15
A4
Address Bus 4
16
A3
Address Bus 3
17
A6
Address Bus 6
18
A5
Address Bus 5
19
EA
External Access Input
20
A7
Address Bus 7
21
A8
Address Bus 8
22
RESET
Reset Output (High Active)
23
A10
Address Bus 10
24
A9
Address Bus 9
25
GND
Signal Ground