PN5120A0HN/C1,557 NXP Semiconductors, PN5120A0HN/C1,557 Datasheet - Page 90
PN5120A0HN/C1,557
Manufacturer Part Number
PN5120A0HN/C1,557
Description
IC TRANSMISSION MOD 40-HVQFN
Manufacturer
NXP Semiconductors
Datasheet
1.PN5120A0HN1C2118.pdf
(125 pages)
Specifications of PN5120A0HN/C1,557
Rf Type
Read / Write
Frequency
13.56MHz
Features
ISO14443-A, ISO14443-B
Package / Case
40-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 90 of 125
- Download datasheet (813Kb)
NXP Semiconductors
13. FIFO buffer
PN512
Product data sheet
COMPANY PUBLIC
13.1 Accessing the FIFO buffer
13.2 Controlling the FIFO buffer
13.3 FIFO buffer status information
An 8 × 64 bit FIFO buffer is used in the PN512. It buffers the input and output data stream
between the host and the PN512’s internal state machine. This makes it possible to
manage data streams up to 64 bytes long without the need to take timing constraints into
account.
The FIFO buffer input and output data bus is connected to the FIFODataReg register.
Writing to this register stores one byte in the FIFO buffer and increments the internal FIFO
buffer write pointer. Reading from this register shows the FIFO buffer contents stored in
the FIFO buffer read pointer and decrements the FIFO buffer read pointer. The distance
between the write and read pointer can be obtained by reading the FIFOLevelReg
register.
When the microcontroller starts a command, the PN512 can, while the command is in
progress, access the FIFO buffer according to that command. Only one FIFO buffer has
been implemented which can be used for input and output. The microcontroller must
ensure that there are not any unintentional FIFO buffer accesses.
The FIFO buffer pointers can be reset by setting FIFOLevelReg register’s FlushBuffer bit
to logic 1. Consequently, the FIFOLevel[6:0] bits are all set to logic 0 and the ErrorReg
register’s BufferOvfl bit is cleared. The bytes stored in the FIFO buffer are no longer
accessible allowing the FIFO buffer to be filled with another 64 bytes.
The host can get the following FIFO buffer status information:
The PN512 can generate an interrupt signal when:
If the maximum number of WaterLevel bytes (as set in the WaterLevelReg register) or less
are stored in the FIFO buffer, the HiAlert bit is set to logic 1. It is generated according to
Equation
HiAlert
•
•
•
•
•
•
Number of bytes stored in the FIFO buffer: FIFOLevelReg register’s FIFOLevel[6:0]
FIFO buffer almost full warning: Status1Reg register’s HiAlert bit
FIFO buffer almost empty warning: Status1Reg register’s LoAlert bit
FIFO buffer overflow warning: ErrorReg register’s BufferOvfl bit. The BufferOvfl bit
can only be cleared by setting the FIFOLevelReg register’s FlushBuffer bit.
ComIEnReg register’s LoAlertIEn bit is set to logic 1. It activates pin IRQ when
Status1Reg register’s LoAlert bit changes to logic 1.
ComIEnReg register’s HiAlertIEn bit is set to logic 1. It activates pin IRQ when
Status1Reg register’s HiAlert bit changes to logic 1.
=
3:
(
64 FIFOLength
–
All information provided in this document is subject to legal disclaimers.
Rev. 3.6 — 10 March 2011
)
111336
≤
WaterLevel
Transmission module
© NXP B.V. 2011. All rights reserved.
PN512
90 of 125
(3)
Related parts for PN5120A0HN/C1,557
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC TRANSMISSION MOD 40-HVQFN
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
IC TRANSMISSION MOD 40-HVQFN
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
IC TRANSMISSION MOD 40-HVQFN
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
IC TRANSMISSION MOD 40-HVQFN
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
IC TRANSMISSION MOD 40-HVQFN
Manufacturer:
NXP Semiconductors
Datasheet:
Part Number:
Description:
Transmission Module 40-Pin HVQFN EP T/R
Manufacturer:
NXP Semiconductors
Datasheet:
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: