PCF8564ACX9/B/1,02 NXP Semiconductors, PCF8564ACX9/B/1,02 Datasheet - Page 23

• Manufacturer Part Number: PCF8564ACX9/B/1,02
• Description: IC RTC/CALENDAR
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF8564ACX9/B/1,02

• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: Die
• Function: Serial Clock, Alarm, Calendar, Timer, Timer Interrupt
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Mounting Style: SMD/SMT
• Rtc Bus Interface: I2C
• Supply Current: 1700 nA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 568-6424-2; PCF8564ACX9/B/1,02

NXP Semiconductors
10. I
PCF8564A
Product data sheet
2
C-bus protocol
10.1 Addressing
10.2 Clock and calendar READ or WRITE cycles
Before any data is transmitted on the I
addressed first. The addressing is always carried out with the first byte transmitted after
the start procedure.
The PCF8564A acts as a slave receiver or slave transmitter. Therefore, the clock signal
SCL is only an input signal, but the data signal SDA is a bidirectional line.
Two slave addresses are reserved for the PCF8564A:
The PCF8564A slave address is shown in
Figure
PCF8564A READ and WRITE cycles. The word address is a 4-bit value that defines
which register is to be accessed next. The upper four bits of the word address are not
used.
Fig 16. Slave address
Fig 17. Master transmits to slave receiver (WRITE mode)
Read: A3h (1010 0011)
Write: A2h (1010 0010)
17,
Figure
S
SLAVE ADDRESS
All information provided in this document is subject to legal disclaimers.
18, and
Rev. 02 — 30 September 2010
Figure 19
acknowledgement
R/W
from slave
0 A
1
group 1
0
show the I
WORD ADDRESS
2
1
C-bus, the device which should respond is
0
Figure
0
2
acknowledgement
C-bus configuration for the different
group 2
15.
from slave
0
A
1
mce189
R/W
Real time clock and calendar
n bytes
DATA
memory word address
PCF8564A
auto increment
acknowledgement
from slave
© NXP B.V. 2010. All rights reserved.
A
mbd822
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