GPIO Signal Termination and Conditioning

GPIO signal level translation termination recommendations

Signal Name

Pullup Voltage

Rmin (Ω)

CLOAD (pF)

Trise (ns)

Tfall (ns)

FLASH_RST_N_LS

3.3

2200

47

138

35

FLASH_TORCH_LS

FLASH_TRIGGER_LS

GPIO_22_LS

3.3

2400

47

100

7.4

ISH_GPIO_0_LS

3.3

2200

47

162

35

ISH_GPIO_1_LS

ISH_GPIO_2_LS

ISH_GPIO_3_LS

ISH_GPIO_4_LS

ISH_GPIO_5_LS

ISH_GPIO_6_LS

ISH_UART_0_CTS_LS

3.3

2200

47

140

35

ISH_UART_0_RTS_LS

ISH_UART_0_RXD_LS

ISH_UART_0_TXD_LS

ISH_UART_0_RTS_LS

Example Using GPIO Signal

The following diagram shows how to use the information in the table to position a pullup resistor for a GPIO signal For information about how the values in the table were measured refer to Terminaltion and Conditioning.

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