5 4 3 2 1 D D CAN Interfacing VCC 2.2 K D4 LED PWR GREEN CAN-Tx C P1 R9 2 R8 R10 120 JP3 CAN Res D3 LED PWR RED CAN-Rx VCC U4 3 5 P4.1 P4.0 GND CANL CANH 2.2 K RxDC TxDC 1 CAN I/O 4 1 Vcc CANH Vref CANL RXD TXD Rs Gnd 7 6 8 2 1 6 2 7 3 8 4 9 5 C SUB-D9 FEMALE CAN AT6660 B B A A Title C51_CAN Size A4 Date: 5 4 3 2 Document Number <Doc> Wednesday, April 28, 2004 Rev 1.0 Sheet 2 1 of 4 5 4 3 2 1 D D ISP Interfacing P1 C 16 Vcc 14 7 13 8 C15 0.1µF SUB-D9 FEMALE RS232 R1IN R2IN C1+ C1C2+ C2- Tx_MCU 11 10 T1IN T2IN Rx_MCU 12 9 R1OUT R2OUT 15 C16 0.1µF 1 3 4 5 T1OUT T2OUT VCC DSR Rx_PC RTS Tx_PC CTS DTR GND 1 6 2 7 3 8 4 9 5 P3.1/TxD C P3_0/RxD Vcc V+ 2 C17 0.1µF Vcc 6 V- MAX202ECSE U7 C18 0.1µF C19 0.1µF B B A A Title C51_ISP Size A Date: 5 4 3 Document Number <Doc> Wednesday, April 28, 2004 2 Rev 1.0 Sheet 3 of 1 4 5 4 3 2 1 Auto ISP Interfacing 14 7 Tx_PC CTS 13 8 C15 0.1µF SUB-D9 FEMALE RS232 R1IN R2IN C1+ C1C2+ C2- T1IN T2IN R1OUT R2OUT 15 C16 0.1µF 1 3 4 5 T1OUT T2OUT VCC DSR Rx_PC GND 1 6 2 7 3 8 4 9 5 D Vcc 16 P1 V+ V- 11 10 Tx_MCU 12 9 Rx_MCU P3.1/TxD D P3_0/RxD Vcc C17 0.1µF 2 Vcc 6 MAX202ECSE U7 C18 0.1µF C19 0.1µF Vcc C C R11 10k /PSEN R3 SW6 Q2 ISP RTS BC547B 10K R1 1K B B Vcc R2 Q1 SW3 DTR C3 1µF 10K RESET BC547B RST R7 10k A A Title C51_AUTOISP Size A Date: 5 4 3 Document Number <Doc> Wednesday, May 05, 2004 2 Rev 1.0 Sheet 1 of 1 4 5 4 3 2 1 D D USB Interfacing Vbus J1 C 1 2 3 4 C R5 Vbus USB_CON_DUSB_CON_D+ GND 27 D- D+ R4 USB B D- D+ 27 Optional 1.5 K R2 B B SW1 VREF VREF USB Unload A A Title C51_USB Size A Date: 5 4 3 Document Number 1 Wednesday, April 28, 2004 2 Rev 1.0 Sheet 4 of 1 4