mfrc52301hn1-trayb NXP Semiconductors, mfrc52301hn1-trayb Datasheet - Page 30
mfrc52301hn1-trayb
Manufacturer Part Number
mfrc52301hn1-trayb
Description
Contactless Reader Ic
Manufacturer
NXP Semiconductors
Datasheet
1.MFRC52301HN1-TRAYB.pdf
(98 pages)
- Current page: 30 of 98
- Download datasheet (771Kb)
NXP Semiconductors
MFRC523_33
Product data sheet
PUBLIC
8.7 Timer unit
The ComIrqReg register’s ErrIRq bit indicates an error detected by the contactless UART
during send or receive. This is indicated when any bit is set to logic 1 in register ErrorReg.
Table 18.
The MFRC523A has a timer unit which the external host can use to manage timing tasks.
The timer unit can be used in one of the following timer/counter configurations:
The timer unit can be used to measure the time interval between two events or to indicate
that a specific event occurred after a specific time. The timer can be triggered by events
explained in the paragraphs below. The timer does not influence any internal events, for
example, a time-out during data reception does not automatically influence the reception
process. Furthermore, several timer-related bits can be used to generate an interrupt.
The timer has an input clock of 13.56 MHz derived from the 27.12 MHz quartz crystal
oscillator. The timer consists of two stages: prescaler and counter.
The prescaler (TPrescaler) is a 12-bit counter. The reload values (TReloadVal_Hi[7:0] and
TReloadVal_Lo[7:0]) for TPrescaler can be set between 0 and 4095 in the TModeReg
register’s TPrescaler_Hi[3:0] bits and TPrescalerReg register’s TPrescaler_Lo[7:0] bits.
The reload value for the counter is defined by 16 bits between 0 and 65535 in the
TReloadReg register.
The current value of the timer is indicated in the TCounterValReg register.
When the counter reaches 0, an interrupt is automatically generated, indicated by the
ComIrqReg register’s TimerIRq bit setting. If enabled, this event can be indicated on
pin IRQ. The TimerIRq bit can be set and reset by the host. Depending on the
configuration, the timer will stop at 0 or restart with the value set in the TReloadReg
register.
The timer status is indicated by the Status1Reg register’s TRunning bit.
Interrupt flag
TimerIRq
TxIRq
CRCIRq
RxIRq
IdleIRq
HiAlertIRq
LoAlertIRq
ErrIRq
•
•
•
•
•
Timeout counter
Watchdog counter
Stop watch
Programmable one shot
Periodical trigger
Interrupt sources
Interrupt source
timer unit
transmitter
CRC coprocessor
receiver
ComIrqReg register
FIFO buffer
FIFO buffer
contactless UART
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 5 March 2010
115233
Trigger action
the timer counts from 1 to 0
a transmitted data stream ends
all data from the FIFO buffer has been processed
a received data stream ends
command execution finishes
the FIFO buffer is almost full
an error is detected
the FIFO buffer is almost empty
Contactless reader IC
MFRC523
© NXP B.V. 2010. All rights reserved.
30 of 98
Related parts for mfrc52301hn1-trayb
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 Philips Semiconductors XA (eXtended Architecture) family of 16-bit single-chip microcontrollers is powerful enough to easily handle the requirements of high performance embedded applications, yet inexpensive enough to compete in the market for hi
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The Philips Semiconductors XA (eXtended Architecture) family of 16-bit single-chip microcontrollers is powerful enough to easily handle the requirements of high performance embedded applications, yet inexpensive enough to compete in the market for hi
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
The XA-S3 device is a member of Philips Semiconductors? XA(eXtended Architecture) family of high performance 16-bitsingle-chip microcontrollers
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: