(PA4)----(nCS)|o\/-|(Vcc)----(3V3)
(PA6)-----(DO)|25xx|(nHOLD)\/(3V3)
(3V3)/\/\(nWP)|    |(CLK)----(PA5)
(GND)----(Vss)|____|(DI)-----(PA7)

stlinkv2
TOP        BOTTOM
RST,PB7    CLK,PA5
SWIM,PB11  DIO,PB14
GND        GND
3V3        3V3
5V         5V

stlinkv2-mod
TOP        BOTTOM
nCS,PA4    CLK,PA5
DO,PA6     DI,PA7
GND        GND
3V3        3V3
5V         5V
