XR21B1422IL40-0A Datasheet, PDF (44/60 Pages) Exar Corporation – Enhanced 2-Ch Full-Speed USB UART

CDC_ACM_MODE_MSB (0x00A) - Read/Write OTP
Bit
7:2
1
0
Default
Description
0
Reserved
These bits are reserved and should be written as ‘0’.
1
Receive Toggle
0: GPIO9 is used for general purpose I/O
1: GPIO9 is used to receive toggle output (default).
1
Transmit Toggle
0: GPIO8 is used for general purpose I/O.
1: GPIO8 is used to transmit toggle output (default).
CDC_ACM_GPIO_DIR_LSB (0x00B) - Read/Write OTP
Bit
7:0
Default
0
GPIO Direction of GPIO[9:0]
0: GPIOx is an input.
1: GPIOx is an output.
Description
CDC_ACM_GPIO_DIR_MSB (0x00C) - Read/Write OTP
Bit
7:2
1:0
Default
0
Reserved
These bits are reserved and should be ‘0.’
0
GPIO Direction of GPIO[9:0]
0: GPIOx is an input.
1: GPIOx is an output.
Description
CDC_ACM_GPIO_INT_MASK_LSB (0x00D) - Read/Write OTP
Bit
7:0
Default
Description
0x0
GPIO Interrupt Mask of GPIO[7:0]
0: A change in the input pin's state causes the device to generate an interrupt packet
1: A change in the input pin's state does not cause the device to generate an interrupt packet
XR21B1422
© 2014 Exar Corporation
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Rev 1A