Silicon Laboratories c8051f33x User Manual page 8

C8051F33x
4.3. Expansion I/O Connector (J1)
The 22-pin Expansion I/O connector J1 provides access to all signal pins of the C8051F330 device. Pins for +3 V,
digital ground and the output of an on-board low-pass filter are also available. 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 J1 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.
4.4. Target Board DEBUG Interface (J4)
The DEBUG connector (J4) provides access to the DEBUG (C2) pins of the C8051F330. It is used to connect the
Serial Adapter or the USB Debug Adapter to the target board for in-circuit debugging and Flash programming.
Table 3 shows the DEBUG pin definitions.
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Table 2. J1 Pin Descriptions
Pin # Description
1 +3 VD (+3.3 VDC)
2 IDAC
3 P0.0
4 P0.1
5 P0.2
6 P0.3
7 P0.4
8 P0.5
9 P0.6
10 P0.7
11 P1.0
Table 3. DEBUG Connector Pin Descriptions
Pin #
1 +3 VD (+3.3 VDC)
2, 3, 9 GND (Ground)
4
5
6
7
8 Not Connected
10
Rev. 0.7
Pin # Description
12 P1.1
13 P1.2
14 P1.3
15 P1.4
16 P1.5
17 P1.6
18 P1.7
19 P2.0
20
RST/C2CLK
21 GND
22 GND
Description
C2D
/RST (Reset)
P3.0
C2CK
USB Power