RX95HF Datasheet, PDF (7/44 Pages) STMicroelectronics – Near field communication transceiver for tag emulation

RX95HF
Pin and signal descriptions
Table 2. RX95HF pin descriptions (continued)
Pin
Pin name
Type⁽¹⁾
Main function
Alternate function
14
IRQ_OUT
15
SPI_SS
16
SPI_MISO
17
SPI_MOSI
18
SPI_SCK
O ⁽⁴⁾
I ⁽⁵⁾
O ⁽⁵⁾
I ⁽⁵⁾
I ⁽⁶⁾
Interrupt output
SPI Slave Select (active low)
SPI Data, Slave Output
SPI Data, Slave Input ⁽⁵⁾
SPI serial clock
19
SSI_0
I ⁽⁵⁾
Select serial communication
interface
20
SSI_1
21
ST_R1
I ⁽⁵⁾
Select serial communication
interface
I ⁽⁷⁾ ST Reserved
22
GND
P Ground (digital)
23
NC
Not connected
24
NC
Not connected
25
NC
Not connected
26
NC
Not connected
27
NC
Not connected
28
NC
Not connected
29
XIN
Crystal oscillator input
30
XOUT
Crystal oscillator output
31
GND_TX
P Ground (RF drivers)
32
ST_R5
ST Reserved
1. I: Input, O: Output, and P: Power
2. Must add a capacitor to ground (~1 nF).
3. Pad internally connected to a Very Weak Pull-up to VPS.
4. Pad internally connected to a Weak Pull-up to VPS.
5. Must not be left floating.
6. Pad internally connected to a Weak Pull-down to GND.
7. Pad input in High Impedance. Must be connected to VPS.
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