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FS23 Scheda tecnica(PDF) 48 Page - NXP Semiconductors

Il numero della parte FS23
Spiegazioni elettronici  Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers
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Produttore elettronici  NXP [NXP Semiconductors]
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FS23 Scheda tecnica(HTML) 48 Page - NXP Semiconductors

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NXP Semiconductors
FS23
Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers
14 AMUX: Analog multiplexer
14.1 Functional description
The AMUX pin delivers 32 analog voltage channels to the MCU ADC input. The voltage channels delivered to
the AMUX pin can be selected by SPI/I2C. The maximum AMUX output voltage range is VDDIO (3.3 V or 5.0
V). An external output capacitor, CAMUX_OUT, is required for the buffer stability.
14.2 Block diagram
aaa-051449
Buffer
R3 SPI/I2C
Signals /3
Signals /10.5
or /20
Signals
R4
R5
x
y
z
AMUX
To MCU ADC
VDDIO
AGND
AMUX[4:0]
CAMUX_OUT
Channels_x
Channels_y
Channels_z
R1
R2
Figure 27. AMUX block diagram.
14.3 Channel selection
Channel
AMUX[4:0]
Signal selection for AMUX output
AMUX_DIV = 0
AMUX_DIV = 1
0
00000
AGND
1
1
1
00001
VDIG: Internal voltage supply (1.6 V)
1
1
2
00010
V1 voltage
3
3
3
00011
V2 voltage
3
3
4
00100
V3 voltage
3
3
5
00101
VBOS internal voltage
3
3
6
00110
VSUP voltage (Divider ratio configurable by SPI/I2C)
10.5
20
7
00111
VSHS voltage (Divider ratio configurable by SPI/I2C)
10.5
20
8
01000
WAKE1 voltage (Divider ratio configurable by SPI/I2C)
10.5
20
9
01001
WAKE2 voltage (Divider ratio configurable by SPI/I2C)
10.5
20
10
01010
HVIO1 voltage (Divider ratio configurable by SPI/I2C)
10.5
20
11
01011
HVIO2 voltage (Divider ratio configurable by SPI/I2C)
10.5
20
12
01100
Die temperature sensor
1
1
13
01101
V1 temperature sensor
1
1
14
01110
V2 temperature sensor
1
1
15
01111
V3 temperature sensor
1
1
16
10000
VDDIO voltage
3
3
> 16
1xxxx
Reserved
N/A
N/A
Table 20. AMUX output selection
FS23
All information provided in this document is subject to legal disclaimers.
© 2024 NXP B.V. All rights reserved.
Product data sheet
Rev. 7.0 — 16 October 2024
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