# Expanders ## {{@273#bkmrk-tiger-city-imx-embed}} - [{{@136#bkmrk-expander-a}}](https://doc.redisage.com/link/136#bkmrk-expander-a) - [{{@136#bkmrk-expander-b}}](https://doc.redisage.com/link/136#bkmrk-expander-b) - [{{@136#bkmrk-expander-c}}](https://doc.redisage.com/link/136#bkmrk-expander-c) - [{{@136#bkmrk-expander-d}}](https://doc.redisage.com/link/136#bkmrk-expander-d) - [{{@136#bkmrk-expander-e}}](https://doc.redisage.com/link/136#bkmrk-expander-e) - [{{@136#bkmrk-expander-f}}](https://doc.redisage.com/link/136#bkmrk-expander-f) ### Expander A Part number: **74HC595BQ** #### Expander A diagram [![26a320af-c494-41e3-9a7b-b14fd0cb1bb5.png](https://doc.redisage.com/uploads/images/gallery/2024-04/scaled-1680-/26a320af-c494-41e3-9a7b-b14fd0cb1bb5.png)](https://doc.redisage.com/uploads/images/gallery/2024-04/26a320af-c494-41e3-9a7b-b14fd0cb1bb5.png) #### Expander A pins description
**Pin** **Type** **Usage** **User-space name** **Description**
1 Q1 DO1 gpiochip8 1 Digital output 1
2 Q2 DO2 gpiochip8 2 Digital output 2
3 Q3 DO3 gpiochip8 3 Digital output 3
4 Q4 DO4 gpiochip8 4 Digital output 4
5 Q5 DO5 gpiochip8 5 Digital output 5
6 Q6 DO6 gpiochip8 6 Digital output 6
7 Q7 DO7 gpiochip8 7 Digital output 7
9 Q7S NC X Not connected
10 MR/ NRST\_GLOBAL X Reset
11 SHCP SPI1\_SCLK X SPI clock
12 STCP SPI1\_CS1 X SPI chip select
13 OE/ GND X Output enable
14 DS SPI1\_MOSI X SPI master out slave in
15 Q0 MUX\_DIO\_SEL gpiochip8 0 MUX\_PWM selection signal
16 VCC +3V3 X Power supply
#### {{@134#bkmrk-spi1}} {{@134#bkmrk-signal-processor-pin}} ### Expander B Part number: **SC16IS752IBS** #### Expander B diagram [![image.png](https://doc.redisage.com/uploads/images/gallery/2024-07/scaled-1680-/VIbimage.png)](https://doc.redisage.com/uploads/images/gallery/2024-07/VIbimage.png) #### Expander B pins description
**Pin** **Type** **Usage** **User-space name** **Description**
1 RXA(I) RS485\_UART1\_RX X RS485 UART1 RX
2 RESET/ RS485\_NRST X Reset
3 XTAL1(I) TXCO\_OUT X Oscillator output
4 XTAL2(O) NC X Not connected
5 VDD +3V3 X Power supply
6 I2C / SPI/ GND X Ground
7 CS/ / A0 SPI2\_CS1 X SPI chip select
8 SI / A1 SPI2\_MOSI X SPI master out slave in
9 SO SPI2\_MISO X SPI master in slave out
10 SCL / SCLK SPI2\_SCLK X SPI clock
11 SDA / VSS GND X Ground
12 VSS GND X Ground
14 IRQ/ RS485\_INT X RS485 interrupt
15 CTSB/ NC X Not connected
16 RTSB/ RS485\_UART2\_RTS X RS485 UART2 RTS
17 GPIO0 / DSRB/ NC X Not connected
18 GPIO1 / DTRB/ NC X Not connected
19 GPIO2 / CDB/ NC X Not connected
20 GPIO3 / RIB/ NC X Not connected
22 TXB(O) RS485\_UART2\_TX X RS485 UART2 TX
23 RXB(I) RS485\_UART2\_RX X RS485 UART2 RX
24 GPIO4 / DSRA/ NC X Not connected
25 GPIO5 / DTRA/ NC X Not connected
26 GPIO6 / CDA/ NC X Not connected
27 GPIO7 / RIA/ NC X Not connected
30 RTSA/ RS485\_UART1\_RTSXRS485 UART1 RTS
31 CTSA/ NC X Not connected
32 TXA(O) RS485\_UART1\_TX X RS485 UART1 TX
#### {{@134#bkmrk-%C2%A0}} {{@134#bkmrk-signal-processor-pin-1}} ### Expander C Part number: **MCP23017-E/ML** #### Expander C diagram [![87288898-dff2-4113-9f01-a2ae6c417343.png](https://doc.redisage.com/uploads/images/gallery/2024-04/scaled-1680-/87288898-dff2-4113-9f01-a2ae6c417343.png)](https://doc.redisage.com/uploads/images/gallery/2024-04/87288898-dff2-4113-9f01-a2ae6c417343.png) #### Expander C pins description
**Pin** **Port** **Type** **User-space name** **Description**
1 GPB4 GPIO gpiochip5 12 UIO4 voltage
2 GPB5 GPIO gpiochip5 13 UIO4 current
3 GPB6 GPIO gpiochip5 14 UIO4 resistance
4 GPB7 GPIO gpiochip5 15 UIO3 resistance
5 VDD +3V3 X Power supply
6 VSS GND X Ground
7 NC NC X Not connected
8 SCK GPIO X I2C clock
9 SDA GPIO X I2C data
10 NC NC X Not connected
11 A0 GND X Address bit 0
12 A1 GND X Address bit 1
13 A2 GND X Address bit 2
14 RESET/ EXP2\_NRST X Reset
15 INTB NC X Not connected
16 INTA NC X Not connected
17 GPA0 GPIO gpiochip5 0 UIO2 resistance
18 GPA1 GPIO gpiochip5 1 UIO1 resistance
19 GPA2 GPIO gpiochip5 2 UIO1 voltage
20 GPA3 GPIO gpiochip5 3 UIO2 voltage
21 GPA4 GPIO gpiochip5 4 UIO3 voltage
22 GPA5 GPIO gpiochip5 5 UIO1 current
23 GPA6 GPO gpiochip5 6 UIO4 I source
24 GPA7 GPIO gpiochip5 7 UIO3 current
25 GPB0 GPIO gpiochip5 8 UIO2 current
26 GPB1 GPO gpiochip5 9 UIO1 I source
27 GPB2 GPO gpiochip5 10 UIO2 I source
28 GPB3 GPO gpiochip5 11 UIO3 I source
#### {{@134#bkmrk-i2c3}} {{@134#bkmrk-device-name%3A-%2Fdev%2Fi2}} {{@134#bkmrk-signal-processor-pin-2}} ### Expander D Part number: **MCP23017** #### Expander D diagram [![9863a4a5-4f9b-4981-bbdd-6a5ed3cc77b1.png](https://doc.redisage.com/uploads/images/gallery/2024-04/scaled-1680-/9863a4a5-4f9b-4981-bbdd-6a5ed3cc77b1.png)](https://doc.redisage.com/uploads/images/gallery/2024-04/9863a4a5-4f9b-4981-bbdd-6a5ed3cc77b1.png) #### Expander D pins description
**Pin** **Port** **Type** **User-space name** **Description**
1 GPB4 GPO gpiochip6 12 LED3 BLUE ON / OFF
2 GPB5 GPO gpiochip6 13 LED4 GREEN ON / OFF
3 GPB6 GPO gpiochip6 14 OLED ON / OFF
4 GPB7 GPO gpiochip6 15 LED4 BLUE ON / OFF
5 VDD +3V3 X Power supply
6 VSS GND X Ground
7 NC1 NC X Not connected
8 SCK GPIO X I2C clock
9 SDA GPIO X I2C data
10 NC2 NC X Not connected
11 A0 GND X Address bit 0
12 A1 GND X Address bit 1
13 A2 GND X Address bit 2
14 RESET/ NRST\_GLOBAL X Reset
15 INTB HMI\_IRQ X Interrupt B
16 INTA HMI\_IRQ X Interrupt A
17 GPA0 GPI gpiochip6 0 Joystick left input
18 GPA1 GPI gpiochip6 1 Joystick up input
19 GPA2 GPI gpiochip6 2 Joystick down input
20 GPA3 GPI gpiochip6 3 Joystick right input
21 GPA4 GPI gpiochip6 4 Joystick push input
22 GPA5 GPO gpiochip6 5 LED3 RED ON / OFF
23 GPA6 GPI gpiochip6 6 DIP switch 6 input
24 GPA7 GPI gpiochip6 7 DIP switch 7 input
25 GPB0 GPI gpiochip6 8 DIP switch 8 input
26 GPB1 GPO gpiochip6 9 LED 5 V power supply ON / OFF
27 GPB2 GPO gpiochip6 10 LED3 GREEN ON / OFF
28 GPB3 GPO gpiochip6 11 LED4 RED ON / OFF
#### {{@134#bkmrk-i2c4}} {{@134#bkmrk-device-name%3A-%2Fdev%2Fi2-1}} {{@134#bkmrk-signal-processor-pin-3}} ### Expander E Part number: **MCP23017-E/ML** #### Expander E diagram [![92e3390d-322f-46b4-a3d4-4e39611cf250.png](https://doc.redisage.com/uploads/images/gallery/2024-04/scaled-1680-/92e3390d-322f-46b4-a3d4-4e39611cf250.png)](https://doc.redisage.com/uploads/images/gallery/2024-04/92e3390d-322f-46b4-a3d4-4e39611cf250.png) #### Expander E pins description
**Pin** **Port** **Type** **User-space name** **Description**
1 GPB4 GPI gpiochip5 12 Digital input 4 (DIO circuit)
2 GPB5 GPI gpiochip5 13 Digital input 5 (DIO circuit)
3 GPB6 GPI gpiochip5 14 Digital input 6 (DIO circuit)
4 GPB7 GPI gpiochip5 15 Digital input 7 (DIO circuit)
5 VDD +3V3 X Power supply
6 VSS GND X Ground
7 NC NC X Not connected
8 SCK GPIO X I2C clock
9 SDA GPIO X I2C data
10 NC NC X Not connected
11 A0 +3V3 X Address bit 0
12 A1 +3V3 X Address bit 1
13 A2 GND X Address bit 2
14 RESET/ EXP1\_NRST X Reset
15 INTB GPIO\_EXP\_INT X Interrupt B
16 INTA GPIO\_EXP\_INT X Interrupt A
17 GPA0 GPO gpiochip5 0 Termination RS485\_4 ON / OFF
18 GPA1 GPO gpiochip5 1 Termination RS485\_3 ON / OFF
19 GPA2 GPO gpiochip5 2 Termination RS485\_2 ON / OFF
20 GPA3 GPO gpiochip5 3 Termination RS485\_1 ON / OFF
21 GPA4 NC X Not connected
22 GPA5 NC X Not connected
23 GPA6 GPO gpiochip5 6 Secure chip idle/busy
24 GPA7 GPI gpiochip5 7 Digital input 1 (DIO circuit)
25 GPB0 GPO gpiochip5 8 Digital input 2 (DIO circuit)
26 GPB1 GPI gpiochip5 9 SD detect
27 GPB2 GPI gpiochip5 10 VIN level error
28 GPB3 GPI gpiochip5 11 Digital input 3 (DIO circuit)
#### {{@134#bkmrk-i2c4}} {{@134#bkmrk-device-name%3A-%2Fdev%2Fi2-1}} {{@134#bkmrk-signal-processor-pin-3}} ### Expander F Part number: **SC16IS752IBS** #### Expander F diagram [![image.png](https://doc.redisage.com/uploads/images/gallery/2024-07/scaled-1680-/VIbimage.png)](https://doc.redisage.com/uploads/images/gallery/2024-07/VIbimage.png) #### Expander F pins description
**Pin** **Type** **Usage** **User-space name** **Description**
1 RXA(I) RS485\_UART4\_RX X RS485 UART4 RX
2 RESET/ RS485\_NRST X Reset
3 XTAL1(I) TXCO\_OUT X Oscillator output
4 XTAL2(O) NC X Not connected
5 VDD +3V3 X Power supply
6 I2C / SPI/ GND X Ground
7 CS/ / A0 SPI2\_CS2 X SPI chip select
8 SI / A1 SPI2\_MOSI X SPI master out slave in
9 SO SPI2\_MISO X SPI master in slave out
10 SCL / SCLK SPI2\_SCLK X SPI clock
11 SDA / VSS GND X Ground
12 VSS GND X Ground
14 IRQ/ RS485\_INT X RS485 interrupt
15 CTSB/ NC X Not connected
16 RTSB/ RS485\_UART3\_RTS X RS485 UART3 RTS
17 GPIO0 / DSRB/ NC X Not connected
18 GPIO1 / DTRB/ NC X Not connected
19 GPIO2 / CDB/ NC X Not connected
20 GPIO3 / RIB/ NC X Not connected
22 TXB(O) RS485\_UART3\_TX X RS485 UART3 TX
23 RXB(I) RS485\_UART3\_RX X RS485 UART3 RX
24 GPIO4 / DSRA/ NC X Not connected
25 GPIO5 / DTRA/ NC X Not connected
26 GPIO6 / CDA/ NC X Not connected
27 GPIO7 / RIA/ NC X Not connected
30 RTSA/ RS485\_UART4\_RTSXRS485 UART4 RTS
31 CTSA/ NC X Not connected
32 TXA(O) RS485\_UART4\_TX X RS485 UART4 TX
#### {{@134#bkmrk-%C2%A0}} {{@134#bkmrk-signal-processor-pin-1}}