Real Time Clock (Rtc) - Xilinx ZC706 User Manual

Real Time Clock (RTC)

The Epson RTC-8564JE (U26) is an I
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.
X-Ref Target - Figure 1-23
IIC_RTC_SDA
IIC_RTC_SCL
IIC_RTC_IRQ_1_B
Real time clock connections to the XC7Z045 AP SoC and the PCA9548 8-Channel bus switch
are listed in Table
Table 1-26: Real Time Clock Connections
RTC-8564JE (U16) Pin
6
7
10
Information about the RTC-8564JE is available at the Epson Electronics America website
[Ref 30].
ZC706 Evaluation Board User Guide
UG954 (v1.5) September 10, 2015
2
C bus interface real-time clock that has a built-in
VADJ
U26
R270
RTC-8564JE
10.0 KΩ
Real Time Clock
0.1W
Module
7
SDA
6
SCL
10
INT
Figure 1-23: Real Time Clock Circuit
1-26. Refer to Table 1-25
Net Name
IIC_RTC_SCL U65.11 (PCA9548 SC4)
IIC_RTC_SDA U65.10 (PCA9548 SD4)
IIC_RTC_IRQ_1_B U1.AA17 (XC7Z045 AP SoC PL BANK 10)
www.xilinx.com
VCC3V3
D4
1
J60
BAT54T1G
YELLOW
30V 400 mW
16
VCC
15
D6
CLKOE
BAT54T1G
14
CLKOUT
30V 400 mW
13
GND
C350
0.01μF
25V
X7R
GND GND
2
for the RTC I C address.
Connects To
Feature Descriptions
VCC2V5
D5
BAT54T1G
30V 400 mW
R501
1
4.7 KΩ
0.1WW
2
B3
Panasonic
ML621S/DN
3V
GND
UG954_c1_23_041113
55
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