Xilinx ZC702 User Manual

ZC702 Board User Guide www.xilinx.com 66
UG850 (v1.7) March 27, 2019
Feature Descriptions
Jumper J37 can be used to select either an external voltage reference (VREF) or on-chip
voltage reference for the analog-to-digital converter.
For external measurements an XADC header (J19) is provided. This header can be used to
provide analog inputs to the XC7Z020 SoC dedicated VP/VN channel, and to the
VAUXP[0]/VAUXN[0], VAUXP[8]/VAUXN[8] auxiliary analog input channels. Simultaneous
sampling of Channel 0 and Channel 8 is supported.
A user-provided analog signal multiplexer card can be used to sample additional external
analog inputs using the 4 GPIO pins available on the XADC header as multiplexer address
lines. Figure 1-32 shows the XADC header connections.
Table 1-34 describes the XADC header J40 pin functions.
X-Ref Target - Figure 1-32
Figure 1-32: XADC Header (J40)
UG850_c1_32_030513
XADC_VP
XADC_VAUX0N
XADC_VAUX8P
XADC_DXN
XADC_VCC_HEADER
XADC_VN
XADC_VAUX0P
XADC_VAUX8N
XADC_DXP
XADC_VREF
XADC_GPIO_0
XADC_GPIO_2
XADC_GPIO_1
XADC_GPIO_3
J40
1
3
5
7
9
11
13
15
17
19
2
4
6
8
10
12
14
16
18
20
GND
XADC_AGNDXADC_AGND
XADC_VCC5V0
VADJ
Table 1-34: XADC Header J40 Pinout
Net Name
J19 Pin
Number
Description
VN, VP 1, 2 Dedicated analog input channel for the XADC.
XADC_VAUX0P, N 3, 6
Auxiliary analog input channel 0. Also supports use as I/O inputs when
anti alias capacitor is not present.
XADC_VAUX8N, P 7, 8
Auxiliary analog input channel 8. Also supports use as I/O inputs when
anti alias capacitor is not present.
DXP, DXN 9, 12 Access to thermal diode.
XADC_AGND 4, 5, 10 Analog ground reference.
XADC_VREF 11 1.25V reference from the board.
XADC_VCC5V0 13 Filtered 5V supply from board.
XADC_VCC_HEADER 14 Analog 1.8V supply for XADC.
VADJ 15 VCCO supply for bank which is the source of DIO pins.
GND 16 Digital Ground (board) Reference
XADC_GPIO_3, 2, 1, 0 19, 20, 17, 18
Digital I/O. These pins should come from the same bank. These I/Os
should not be shared with other functions because they are required to
support 3-state operation.
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Xilinx ZC702 Specifications

General

Brand	Xilinx
Model	ZC702
Category	Motherboard
Language	English