Digilent 410-279P-KIT - Manual (Page 25)

ZYBO™ FPGA Board Reference Manual
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Page 25 of 26
Pmod JA
(XADC) Pmod JB
(Hi-Speed) Pmod JC
(Hi-Speed) Pmod JD
(Hi-Speed) Pmod JE
(Std.) Pmod JF
(MIO)
JA1: N15 JB1: T20 JC1: V15 JD1: T14 JE1: V12 JF1: MIO-13
JA2: L14 JB2: U20 JC2: W15 JD2: T15 JE2: W16 JF2: MIO-10
JA3: K16 JB3: V20 JC3: T11 JD3: P14 JE3: J15 JF3: MIO-11
JA4: K14 JB4: W20 JC4: T10 JD4: R14 JE4: H15 JF4: MIO-12
JA7: N16 JB7: Y18 JC7: W14 JD7: U14 JE7: V13 JF7: MIO-0
JA8: L15 JB8: Y19 JC8: Y14 JD8: U15 JE8: U17 JF8: MIO-9
JA9: J16 JB9: W18 JC9: T12 JD9: V17 JE9: T17 JF9: MIO-14
JA10: J14 JB10: W19 JC10: U12 JD10: V18 JE10: Y17 JF10: MIO-15
Table 9. Pmod pinout.
Digilent produces a large collection of Pmod accessory boards that can attach to the Pmod expansion connectors
to add ready-made functions like A/D’s, D/A’s, motor drivers, sensors, and other functions. See
www.digilentinc.com for more information.
The ZYBO has six Pmod connectors, some of which behave differently than others. Each Pmod connector falls into
one of four categories: standard, MIO connected, XADC, or high-speed Table 9 specifies which category each Pmod
falls into, and also lists the Zynq pins they are connected to. The following sections describe the different types of
Pmods.
16.1 Standard Pmod
The standard Pmod connector is connected to the PL of the Zynq via 200 Ohm series resistors. The series resistors
prevent short circuits that can occur if the user accidently drives a signal that is supposed to be used as an input.
The downside to this added protection is that these resistors can limit the maximum switching speed of the data
signals. If the Pmod being used does not require high-speed access, then the standard Pmod connector should be
used to help prevent damage to the devices.
16.2 MIO Pmod
The MIO Pmod connector is connected to the MIO bus in the PS of the Zynq via 200 Ohm series resistors. Like the
standard Pmod connector, these series resistors add protection at the cost of maximum switching speed. Since
these data signals are connected to the MIO interface, they can only be accessed by the PS peripheral controller
cores. The GPIO, UART, I2C, and SPI cores can all be used to drive devices connected to this Pmod. Note that the
pin layout of the UART and I2C cores will not align perfectly with the typical Pmod pinouts for these interfaces. This
means that UART or I2C devices connected to this Pmod may require some of the pins to be swapped around
externally using individual wires between the ZYBO and the Pmod.
16.3 Dual Analog/Digital Pmod (XADC Pmod)
The on-board Pmod expansion connector labeled “JA” is wired to the auxiliary analog input pins of the PL.
Depending on the configuration, this connector can be used to input differential analog signals to the analog-to-