PN5120A0HN/C1,557 NXP Semiconductors, PN5120A0HN/C1,557 Datasheet - Page 94
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
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16. Power reduction modes
PN512
Product data sheet
COMPANY PUBLIC
16.1 Hard power-down
16.2 Soft power-down mode
16.3 Transmitter power-down mode
Hard power-down is enabled when pin NRSTPD is LOW. This turns off all internal current
sinks including the oscillator. All digital input buffers are separated from the input pins and
clamped internally (except pin NRSTPD). The output pins are frozen at either a HIGH or
LOW level.
Soft Power-down mode is entered immediately after the CommandReg register’s
PowerDown bit is set to logic 1. All internal current sinks are switched off, including the
oscillator buffer. However, the digital input buffers are not separated from the input pins
and keep their functionality. The digital output pins do not change their state.
During soft power-down, all register values, the FIFO buffer content and the configuration
keep their current contents.
After setting the PowerDown bit to logic 0, it takes 1024 clocks until the Soft power-down
mode is exited indicated by the PowerDown bit. Setting it to logic 0 does not immediately
clear it. It is cleared automatically by the PN512 when Soft power-down mode is exited.
Remark: If the internal oscillator is used, you must take into account that it is supplied by
pin AVDD and it will take a certain time (t
cycles can be detected by the internal logic. It is recommended for the serial UART, to first
send the value 55h to the PN512. The oscillator must be stable for further access to the
registers. To ensure this, perform a read access to address 0 until the PN512 answers to
the last read command with the register content of address 0. This indicates that the
PN512 is ready.
The Transmitter Power-down mode switches off the internal antenna drivers thereby,
turning off the RF field. Transmitter power-down mode is entered by setting either the
TxControlReg register’s Tx1RFEn bit or Tx2RFEn bit to logic 0.
All information provided in this document is subject to legal disclaimers.
Rev. 3.6 — 10 March 2011
111336
osc
) until the oscillator is stable and the clock
Transmission module
© NXP B.V. 2011. All rights reserved.
PN512
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