Datasheet

Zynq-7000 All Programmable SoC (Z-7007S, Z-7012S, Z-7014S, Z-7010, Z-7015, and Z-7020)
DS187 (v1.19) October 3, 2016 www.xilinx.com
Product Specification 38
Output Delay Measurements
Output delays are measured with short output traces. Standard termination was used for all testing. The propagation delay
of the trace is characterized separately and subtracted from the final measurement, and is therefore not included in the
generalized test setups shown in Figure 18 and Figure 19.
LVDS_25, 2.5V LVDS_25 1.2 – 0.125 1.2 + 0.125 0
(6)
–
BLVDS_25, 2.5V BLVDS_25 1.25 – 0.125 1.25 + 0.125 0
(6)
–
MINI_LVDS_25, 2.5V MINI_LVDS_25 1.25 – 0.125 1.25 + 0.125 0
(6)
–
PPDS_25 PPDS_25 1.25 – 0.125 1.25 + 0.125 0
(6)
–
RSDS_25 RSDS_25 1.25 – 0.125 1.25 + 0.125 0
(6)
–
TMDS_33 TMDS_33 3 – 0.125 3 + 0.125 0
(6)
–
Notes:
1. The input delay measurement methodology parameters for LVDCI are the same for LVCMOS standards of the same voltage. Input delay
measurement methodology parameters for HSLVDCI are the same as for HSTL_II standards of the same voltage. Parameters for all other
DCI standards are the same for the corresponding non-DCI standards.
2. Input waveform switches between V
L
and V
H
.
3. Measurements are made at typical, minimum, and maximum V
REF
values. Reported delays reflect worst case of these measurements. V
REF
values listed are typical.
4. Input voltage level from which measurement starts.
5. This is an input voltage reference that bears no relation to the V
REF
/ V
MEAS
parameters found in IBIS models and/or noted in Figure 18.
6. The value given is the differential input voltage.
X-Ref Target - Figure 18
Figure 18: Single-Ended Test Setup
X-Ref Target - Figure 19
Figure 19: Differential Test Setup
Table 54: Input Delay Measurement Methodology (Cont’d)
Description I/O Standard Attribute V
L
(1)(2)
V
H
(1)(2)
V
MEAS
(1)(4)(6)
V
REF
(1)(3)(5)
V
REF
R
REF
V
MEAS
(Voltage Level When Taking
Delay Measurement)
C
REF
(Probe Capacitance)
FPGA Output
DS187_20_090914
R
REF
V
MEAS
+
–
C
REF
FPGA Output
DS187_21_090914