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ZC702 Board User Guide
www.xilinx.com
38
UG850 (v1.2) April 4, 2013
Feature Descriptions
Real time clock connections to the XC7Z020 AP SoC and the PCA9548 8-Channel bus switch
are listed in
Table 1-20
.
Information about the RTC-8564JE is available at the Epson Electronics America website
[Ref 9]
.
I/O Expansion Header
[
Figure 1-2
, callout
16
]
The 2 x 6 I/O expansion header J54 supports Digilent Pmod Peripheral Modules. 8 pins
(IIC_PMOD[0:7]) are connected to the TI TCA6416APWR I
2
C expansion port device U80. See
the Digilent website for information on Digilent Pmod Peripheral Modules
[Ref 10]
.
The expansion header circuit is shown in
Figure 1-18
.
X-Ref Target - Figure 1-17
Figure 1-17:
Real Time Clock Circuit
Table 1-20:
Real Time Clock Connections
RTC-8564JE (U16) Pin
Net Name
Connects To
6
IIC_RTC_SCL
U44.11 (PCA9548 SC4)
7
IIC_RTC_SDA
U44.10 (PCA9548 SD4)
10
IIC_RTC_IRQ_1_B
U1.U7 (XC7Z020 AP SoC PL BANK 13)
UG850_c1_17_031913
VCC3V3
VCC2V5
VADJ
GND
IIC_RTC_SCL
B2
NBL-621/N9D
2V
C217
0.01
µ
F
25V
X7R
1
J39
YELLOW
IIC_RTC_IRQ_1_B
IIC_RTC_SDA
D6
BAT54T1G
30V 400 mW
RTC-8564JE
Real Time Clock
Module
7
6
10
U16
16
15
14
13
INT
SCL
SDA
GND
CLKOUT
CLKOE
VCC
D5
BAT54T1G
30V 400 mW
D7
BAT54T1G
30V 400 mW
GND
GND
R187
10.0K
0.1W
R249
4.7K