PN5120A0HN1/C1 NXP Semiconductors, PN5120A0HN1/C1 Datasheet - Page 79

• Manufacturer Part Number: PN5120A0HN1/C1
• Description: RF Wireless Misc COMBO ANALOG/DIGI IC
• Manufacturer: NXP Semiconductors
• Type: Transmission Moduler

Specifications of PN5120A0HN1/C1

• Package / Case: HVQFN EP
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 30 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PN5120A0HN1/C1,157

NXP Semiconductors
11. AnaLog interface and contactless UART
111334
Product data sheet
11.1 General
11.2 TX driver
The PN512 supports different Contactless Communication modes. The integrated
contactless UART supports the external μ-Controller online with framing and error
checking of the protocol requirements for the different selected communication schemes
as Card Operation mode, Reader/Writer Operating mode or NFIP-1 mode up to 424 kbit.
Higher transfer speeds up to 3.39 Mbit can be handled by the digital part of the
contactless UART. To modulate and demodulate the data an external circuit has to be
connected to the communication interface pins SIGIN/SIGOUT.
The contactless UART handles the protocol requirements for the communication schemes
in co-operation with the host controller. The protocol handling itself generates bit- and
byte-oriented framing and handles error detection like Parity and CRC according to the
different contactless communication schemes.
Remark: The size and tuning of the antenna and the power supply voltage have an
important impact on the achievable operating distance.
The signal delivered on pin TX1 and pin TX2 is the 13.56 MHz energy carrier modulated
by an envelope signal. It can be used to drive an antenna directly, using a few passive
components for matching and filtering, see
The signal on TX1 and TX2 can be configured by the register TxControlReg, see
8.2.2.5
The modulation index can be set by adjusting the impedance of the drivers. The
impedance of the p-driver can be configured by the registers CWGsPReg and
ModGsPReg. The impedance of the n-driver can be configured by the register
GsNOnReg and GsNOffReg. Furthermore, the modulation index depends on the antenna
design and tuning.
Note: It is recommended to use a modulation index in the range of 8% for the FeliCa and
NFC IP-1 communication scheme at 212 and 424 kbit.
The register TxModeReg and TxAutoSelReg control the data rate and framing during
transmission and the setting of the antenna driver to support the different requirements at
the different modes and transfer speeds.
“TxControlReg”.
Rev. 3.4 — 8 September 2009
Section 20 “Application design-in
Transmission Module
© NXP B.V. 2010. All rights reserved.
PN512
information”.
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