NXP Semiconductors
UM10858
PN7462 family HW user manual
UM10858
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.4 — 14 May 2018
314514
34 of 345
(1) Powering the microcontroller and the digital blocks (DVDD)
(2) (3) 2 possibilities for powering the pad interfaces (PVDD_IN and PVDD_M_IN)
Remark
: The capacitance must be chosen so that the capacitance value is correct 5 V.
Fig 10. Powering the PN7462 family microcontroller
6.1.2 Contactless reader supply
In order to use the PN7462 family as contactless reader the following voltages need to
be supplied:
•
VBUS
•
PVDD_IN (if PVDD_OUT is not used, it needs to be shorted to GND)
•
TVDD_IN (If supplied by TVDD_OUT, VUP_TX needs to be supplied)
•
DVDD pin must be connected to VDD and buffered with 1µF capacitor to GND
For SPI/ I²C master following supply is also needed:
•
PVDD_M_IN
The contactless interface is powered through TVDD_IN. This pin can be supplied either
externally or by using TVDD_OUT.
VDD
DVDD
(1)
(2)
1 µF
VBUSP
aaa-025630
VBUS
GND
T VSS
GNDC
GNDP
V
DDP(VBUS)
,
I
DDP(VBUS)
1 µF
PVDD_OUT
PVDD_IN
PVDD_M_IN
1 µF
VBUS
V
DDP(VBUS)
,
I
DDP(VBUS)
1 µF
(3)
PVDD_OUT
PVDD_IN
PVDD_M_IN
VBUS
V
DDP(VBUS)
,
I
DDP(VBUS)
external supply
1 µF
1 µF
PN7462 family
PN7462 family
PN7462 family
VBUSP
VBUSP