C 8 0 5 1 F 4 1 x
8
Rev. 0.3
4.4. Expansion I/O Connector (J1)
The 24-pin Expansion I/O connector J11 provides access to all signal pins of the C8051F410 device. A small
through-hole prototyping area is also provided. All I/O signals routed to connector J1 are also routed to through-
hole connection points between J11 and the prototyping area (see Figure 4 on page 6). Each connection point is
labeled indicating the signal available at the connection point. See Table 2 for a list of pin descriptions for J1.
Table 1. Target Board I/O Descriptions
Description
I/O
Jumper
SW1
Reset
none
SW2
P1.4
J5[3–4]
SW3
P1.5
J5[7–8]
Green LED D3
P2.1
J5[1–2]
Green LED D5
P2.3
J5[5–6]
Red LED D1
VREGIN
J24
Red LED D2
VDD
J23
Red LED D12
VIO
J33
Table 2. J1 Pin Descriptions
Pin #
Description
Pin #
Description
1
P0.0
13
P1.4
2
P0.1
14
P1.5
3
P0.2
15
P1.6
4
P0.3
16
P1.7
5
P0.4
17
P2.0
6
P0.5
18
P2.1
7
P0.6
19
P2.2
8
P0.7
20
P2.3
9
P1.0
21
P2.4
10
P1.1
22
P2.5
11
P1.2
23
P2.6
12
P1.3
24
P2.7
