datasheet: http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00105814.pdf description: STM32F042 in TSSOP-20 package footprint: agg:TSSOP-20 name: STM32F0xxFxPx ordercodes: - [Farnell, '2469549'] pins: - - - [VDD, 16, pwrin] - [VDDA, 5, pwrin] - [VSS, 15, pwrin] - - [NRST, 4, in] - - [PB1, 14, bidi] - [PB8/BOOT0, 1, bidi] - - [PF0, 2, bidi] - [PF1, 3, bidi] - - - [PA0, 6, bidi] - [PA1, 7, bidi] - [PA2, 8, bidi] - [PA3, 9, bidi] - [PA4, 10, bidi] - [PA5, 11, bidi] - [PA6, 12, bidi] - [PA7, 13, bidi] - - [PA9/PA11, 17, bidi] - [PA10/PA12, 18, bidi] - [PA13, 19, bidi] - [PA14, 20, bidi]