Xilinx ZC706 User Manual

ZC706 Evaluation Board User Guide www.xilinx.com 55
UG954 (v1.5) September 10, 2015
Feature Descriptions
Real Time Clock (RTC)
The Epson RTC-8564JE (U26) is an I
2
C bus interface real-time clock that has a built-in
32.768 KHz oscillator with these features:
• Frequency output options: 32.768 KHz, 1,024 Hz, 32 Hz or 1 Hz
• Calendar output functions: Year, month, day, weekday, hour, minute and second
• Clock counter, alarm and fixed-cycle timer interrupt functions
• Back-up battery B3 Panasonic ML621S/DN, 3.0V rechargeable cell
Programming information for the RTC-8564JE is available in the RTC-8564JE/NB Application
Manual [Ref 29].
Figure 1-23 shows the real time clock circuit.
Real time clock connections to the XC7Z045 AP SoC and the PCA9548 8-Channel bus switch
are listed in Table 1-26. Refer to Table 1-25 for the RTC I
2
C address.
Information about the RTC-8564JE is available at the Epson Electronics America website
[Ref 30].
X-Ref Target - Figure 1-23
Figure 1-23: Real Time Clock Circuit
Table 1-26: Real Time Clock Connections
RTC-8564JE (U16) Pin Net Name Connects To
6 IIC_RTC_SCL U65.11 (PCA9548 SC4)
7 IIC_RTC_SDA U65.10 (PCA9548 SD4)
10 IIC_RTC_IRQ_1_B U1.AA17 (XC7Z045 AP SoC PL BANK 10)
UG954_c1_23_041113
VCC3V3 VCC2V5
VADJ
GND
IIC_RTC_SCL
B3
Panasonic
ML621S/DN
3V
C350
0.01μF
25V
X7R
1
J60
YELLOW
IIC_RTC_IRQ_1_B
IIC_RTC_SDA
D5
BAT54T1G
30V 400 mW
RTC-8564JE
Real Time Clock
Module
7
6
10
U26
16
15
14
13
INT
SCL
SDA
GND
CLKOUT
CLKOE
VCC
D4
BAT54T1G
30V 400 mW
D6
BAT54T1G
30V 400 mW
GND
GND
R270
10.0 KΩ
0.1W
R501
4.7 KΩ
0.1WW
1
2
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Xilinx ZC706 Specifications

General

Brand	Xilinx
Model	ZC706
Category	Motherboard
Language	English