PCF2127AT/1 NXP [NXP Semiconductors], PCF2127AT/1 Datasheet - Page 45
PCF2127AT/1
Manufacturer Part Number
PCF2127AT/1
Description
Integrated RTC, TCXO and quartz crystal
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.PCF2127AT1.pdf
(80 pages)
- Current page: 45 of 80
- Download datasheet (536Kb)
NXP Semiconductors
PCF2127A_2
Product data sheet
Fig 25. Interrupt block diagram
When SI, MI, CDTIE, WD_CD, AIE, TSIE, BIE, BLIE are all disabled, INT will remain high-impedance.
SECONDS COUNTER
MINUTES COUNTER
8.13 Interrupt output, INT
watchdog counter
PCF2127A has an interrupt output pin INT which is open-drain, active LOW. Interrupts
may be sourced from different places:
WD_CD[1:0] = 01
circuit: clear BF
•
•
WD_CD[1:0] = 01
WATCHDOG
from interface:
from interface:
from interface:
set timestamp
COUNTDOWN
COUNTER
low detection
MCU loading
low flag, BLF
from interface:
from interface:
from battery
COUNTER
second or minute timer
countdown timer
clear TSFx
set battery
set battery
flag, TSFx
clear CDTF
set alarm
clear MSF
clear AF
clear BF
flag, AF
flag, BF
MI
SI
All information provided in this document is subject to legal disclaimers.
SET
SET
TSFx: TIMESTAMP
SET
SET
SET
SET
SET
BLF: BATTERY
SECOND FLAG
BF: BATTERY
COUNTDOWN
WATCHDOG
TIMER FLAG
TIMER FLAG
AF: ALARM
LOW FLAG
MINUTE
WDTF:
CLEAR
CLEAR
CLEAR
CLEAR
CLEAR
CLEAR
CLEAR
CDTF:
FLAG
FLAG
FLAG
MSF:
Rev. 02 — 7 May 2010
TRIGGER
TRIGGER
GENERATOR 1
GENERATOR 2
to interface:
read MSF
to interface:
read CDTF
to interface:
read WDTF
to interface:
read AF
to interface:
read TSFx
to interface:
read BF
to interface:
read BLF
PULSE
PULSE
CLEAR
CLEAR
Integrated RTC, TCXO and quartz crystal
TI_TP
0
1
0
1
WD_CD[1:0] = 00
CDTIE
001aag070
SI/MI
TSIE
BLIE
AIE
BIE
PCF2127A
© NXP B.V. 2010. All rights reserved.
INT pin
45 of 80
Related parts for PCF2127AT/1
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
NXP Semiconductors designed the LPC2420/2460 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2458 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2468 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2470 microcontroller, powered by theARM7TDMI-S core, to be a highly integrated microcontroller for a wide range ofapplications that require advanced communications and high quality graphic displays
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
NXP Semiconductors designed the LPC2478 microcontroller, powered by theARM7TDMI-S core, to be a highly integrated microcontroller for a wide range ofapplications that require advanced communications and high quality graphic displays
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The NXP BlueStreak LH75401/LH75411 family consists of two low-cost 16/32-bit System-on-Chip (SoC) devices
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The NXP LPC3130/3131 combine an 180 MHz ARM926EJ-S CPU core, high-speed USB2
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The NXP LPC3141 combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
The NXP LPC3143 combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
The NXP LPC3152 combines an 180 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
The NXP LPC3154 combines an 180 MHz ARM926EJ-S CPU core, High-speed USB 2
Manufacturer:
NXP Semiconductors
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using NXP High-Performance Automotive (HPA) TrenchMOS technology
Manufacturer:
NXP Semiconductors
Datasheet: