U3280M_07 Datasheet, PDF (3/21 Pages) ATMEL Corporation – Transponder Interface for Microcontroller

2. Pin Configuration
Figure 2-1. Pinning
VBatt 1
VDD 2
SCL 3
NRST 4
SDA 5
VSS 6
NC 7
FC 8
16 Coil 2
15 Coil 1
14 NC
13 NC
12 NC
11 NC
10 NGAP
9 MOD
U3280M
Table 2-1.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Description
Symbol Function
VBatt
Power supply voltage input to connect a battery
VDD
Power supply voltage for the microcontroller and EEPROM. At this pin a buffer capacitor (0.5 to 10 µF)
must be connected to buffer the voltage during field supply and to block the VDD of the microcontroller.
SCL
Serial clock line
NRST Reset line bi-directional
SDA
Serial data line
VSS
Circuit ground
NC
Not connected
FC
Field clock output of the front-end clock extractor
MOD
Modulation input
NGAP Gap and field detect output
NC
Not connected
NC
Not connected
NC
Not connected
NC
Not connected
Coil 1 Coil input 1. Use pin to connect a resonant circuitry for communication and field supply
Coil 2 Coil input 2. Use pin to connect a resonant circuitry for communication and field supply
3
4688D–RFID–03/07