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C8051F04x-DK
Rev. 0.6 11
6.9. Expansion I/O Connector (J24)
The 96-pin expansion I/O connector J24 is used to connect daughter boards to the main target board. J24 provides
access to many C8051F040 signal pins. Pins for +3 V, digital ground, analog ground and the unregulated power
supply (VUNREG) are also available. The VUNREG pin is connected directly to the unregulated +V pin of the P1
power connector. See Table 7 for a complete list of pins available at J24.
The J24 socket connector is manufactured by Hirose Electronic Co. Ltd, part number PCN13-96S-2.54DS, Digi-
Key part number H7096-ND. The corresponding plug connector is also manufactured by Hirose Electronic Co. Ltd,
part number PCN10-96P-2.54DS, Digi-Key part number H5096-ND.
Table 7. J24 Pin Descriptions
Pin # Description Pin # Description Pin # Description
A-1 +3 VD2 (+3.3 VDC) B-1 DGND (Digital Gnd) C-1 XTAL1
A-2 MONEN B-2 P1.7 C-2 P1.6
A-3 P1.5 B-3 P1.4 C-3 P1.3
A-4 P1.2 B-4 P1.1 C-4 P1.0
A-5 P2.7 B-5 P2.6 C-5 P2.5
A-6 P2.4 B-6 P2.3 C-6 P2.2
A-7 P2.1 B-7 P2.0 C-7 P3.7
A-8 P3.6 B-8 P3.5 C-8 P3.4
A-9 P3.3 B-9 P3.2 C-9 P3.1
A-10 P3.0 B-10 P0.7 C-10 P0.6
A-11 P0.5 B-11 P0.4 C-11 P0.3
A-12 P0.2 B-12 P0.1 C-12 P0.0
A-13 P7.7 B-13 P7.6 C-13 P7.5
A-14 P7.4 B-14 P7.3 C-14 P7.2
A-15 P7.1 B-15 P7.0 C-15 P6.7
A-16 P6.6 B-16 P6.5 C-16 P6.4
A-17 P6.3 B-17 P6.2 C-17 P6.1
A-18 P6.0 B-18 P5.7 C-18 P5.6
A-19 P5.5 B-19 P5.4 C-19 P5.3
A-20 P5.2 B-20 P5.1 C-20 P5.0
A-21 P4.7 B-21 P4.6 C-21 P4.5
A-22 P4.4 B-22 P4.3 C-22 P4.2
A-23 P4.1 B-23 P4.0 C-23 TMS
A-24 TCK B-24 TDI C-24 TDO
A-25 /RST B-25 DGND (Digital Gnd) C-25 VUNREG
A-26 AGND (Analog Gnd) B-26 DAC1 C-26 DAC0
A-27 CANRX B-27 CANTX C-27
A-28 B-28 VREF C-28 VREFD
A-29 VREF0 B-29 VREF2 C-29 HVAIN-
A-30 HVAIN+ B-30 HVCAP C-30 HVREF
A-31 AIN0.3 B-31 AIN0.2 C-31 AIN0.1
A-32 AIN0.0 B-32 AGND (Analog Gnd) C-32 AV+ (+3.3 VDC Analog)