PCF8564ACX9/1,005 NXP Semiconductors, PCF8564ACX9/1,005 Datasheet - Page 8

• Manufacturer Part Number: PCF8564ACX9/1,005
• Description: IC RTC/CALENDAR I2C 9BUMP
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF8564ACX9/1,005

• 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: 568-6640; PCF8564ACX9/1,005

NXP Semiconductors
PCF8564A
Product data sheet
Fig 4.
COUNTDOWN COUNTER
When bits TIE and AIE are disabled, pin INT will remain high-impedance.
Interrupt scheme
8.3.2.1 Interrupt output
TE
Bits TF and AF:
countdown, TF is set to 1. These bits maintain their value until overwritten using the
interface. If both timer and alarm interrupts are required in the application, the source of
the interrupt can be determined by reading these bits. To prevent one flag being
overwritten while clearing another, a logic AND is performed during a write access.
Bits TIE and AIE:
TF or AF is asserted respectively. The interrupt is the logical OR of these two conditions
when both AIE and TIE are set.
Countdown timer interrupts:
an internal clock and is dependent on the selected source clock for the countdown timer
and on the countdown value n. As a consequence, the width of the interrupt pulse varies
(see
Table 7.
[1]
[2]
Source clock (Hz)
4096
64
1
1
⁄
60
from interface:
from interface:
TF and INT become active simultaneously.
n = loaded countdown value. Timer is stopped when n = 0.
Table
set alarm
clear AF
clear TF
flag AF
INT operation (bit TI_TP = 1)
7).
All information provided in this document is subject to legal disclaimers.
When an alarm occurs, AF is set to 1. Similarly, at the end of a timer
SET
SET
These bits activate or deactivate the generation of an interrupt when
AF: ALARM
TF: TIMER
Rev. 02 — 30 September 2010
CLEAR
CLEAR
FLAG
The pulse generator for the countdown timer interrupt uses
INT period (s)
n = 1
1
1
1
1
⁄
⁄
⁄
⁄
TRIGGER
8192
128
64
64
GENERATOR 2
[2]
CLEAR
PULSE
[1]
to interface:
read TF
to interface:
read AF
TI_TP
0
1
Real time clock and calendar
n > 1
1
1
1
1
TIE
AIE
⁄
⁄
⁄
⁄
4096
64
64
64
PCF8564A
013aaa087
© NXP B.V. 2010. All rights reserved.
e.g. AIE
INT
0
1
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