MOD-USB-RS232

This hardware design by Olimex LTD is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. POWER SUPPLY 3.3V C2 27pF U1 VR1(3.3V) LM1117IMPX-ADJ D2 VUSB BAT54C 3.3V IN 1 C1 100nF OUT ADJ/GND R9 240R/1% GND USB_POWER C7 R8 390R/1% 10uF/6.3V 10uF/6.3V C6 20 USB_DETECT R7 Q1 12MHz/20pF 2 C3 27pF 3 4 RST 5 6 7 8 #SS MOSI 9 10 TXD R2 33R(NA) SCK 11 SCL 12 RXD R3 33R(NA) 13 MISO SDA 14 STAT 15 16 USB_DETECT USB_PWR_3.3 USB_VBUS 17 1 2 D-/PGC 18 OPEN C4 19 D+/PGD PIC18F14K50-I/SS 470nF GND2 GND1 R6 20k USB USB_POWER D-/PGC D+/PGD USB VBUS DD+ ID GND GND4 GND3 RA5/OSC1/CLKIN RA4/AN3/OSC2/CLKOUT RA3/MCLR/VPP RC5/CCP1/P1A/T0CKI RC4/P1B/C12OUT/SRQ RC3/AN7/P1C/C12IN3-/PGM RC6/AN8/SS/T13CKI/T1OSCI RC7/AN9/SDO/T1OSCO RB7/TX/CK RB6/SCK/SCL RB5/AN11/RX/DT RB4/AN10/SDI/SDA RC2/AN6/P1D/C12IN2-/CVREF/INT2 RC1/AN5/C12IN1-/INT1/VREFRC0/AN4/C12IN+/INT0/VREF+ VUSB RA1/D-/PGC VSS RA0/D+/PGD USB 33k WU06S RXD RXD SCL MISO SCK 1 VPP 2 3 4 D+/PGD 5 D-/PGC 6 3.3V RXD 3 UEXT 2 4 TXD 6 SDA 8 MOSI 10 #SS BH10S 2 1 UEXT_MALE 1 3 5 7 9 TXD 4_TX/4_RX 1-2-close 2 OPEN 1 1 UEXT_PWR_E 3 1-2-close 3_RX/3_TX 2 LED STAT STAT R1 4.7k 3.3V TXD 3.3V ICSP MICRO_B C5 10nF 3.3V R5 4.7k VDD R11 RST 3.3V 240R/1% STAT D1 BZV55C8V2 ICSP R4 4.7k R10 560R MOD-USB-RS232_rev_A OLIMEX LTD, PLOVDIV, BULGARIA https://www.olimex.com 3.3V