Parallel ATA Two ATA motherboard sockets on the left, with an ATA connector on the right. Type Internal storage device connector Production history Designer Western Digital, subsequently amended by many others Designed 1986 Superseded by Serial ATA (2003) General specifications Hot pluggable No External No Cable 40 or 80 wires ribbon cable Pins 40 Data Width 16 bits Bitrate 16 MB / s originally later 33, 66, 100 and 133 MB / s Max. devices Two (master / slave) Protocol Parallel Pin out Pin 1 Reset Pin 2 Ground Pin 3 Data 7 Pin 4 Data 8 Pin 5 Data 6 Pin 6 Data 9 Pin 7 Data 5 Pin 8 Data 10 Pin 9 Data 4 Pin 10 Data 11 Pin 11 Data 3 Pin 12 Data 12 Pin 13 Data 2 Pin 14 Data 13 Pin 15 Data 1 Pin 16 Data 14 Pin 17 Data 0 Pin 18 Data 15 Pin 19 Ground Pin 20 Key or VCC_in Pin 21 DDRQ Pin 22 Ground Pin 23 I / O write Pin 24 Ground Pin 25 I / O read Pin 26 Ground Pin 27 IOCHRDY Pin 28 Cable select Pin 29 DDACK Pin 30 Ground Pin 31 IRQ Pin 32 No connect Pin 33 Addr 1 Pin 34 GPIO_DMA66_Detect Pin 35 Addr 0 Pin 36 Addr 2 Pin 37 Chip select 1P Pin 38 Chip select 3P Pin 39 Activity Pin 40 Ground
how many pins are on a pata ide motherboard connector
40 40 40