adau1461 Analog Devices, Inc., adau1461 Datasheet - Page 77

• Manufacturer Part Number: adau1461
• Description: Sigmadsp Stereo, Low Power, 96 Khz, 24-bit Audio Codec With Integrated Pll Adau1461
• Manufacturer: Analog Devices, Inc.

R48 to R51: GPIO Pin Control, 16,582 to 16,585 (0x40C6 to 0x40C9)
The GPIO pin control register sets the functionality of each GPIO pin as shown in Table 77. The GPIO functions use the same pins as the
serial port and must be enabled in the serial data/GPIO pin configuration register (Address 0x40F4). When the GPIO pins are set to
I
pull-up is nominally 250 kΩ.
The output CRC error and output watchdog error settings are sticky, that is, once set, they remain set until the ADAU1461 is reset.
Address
0x40C6
0x40C7
0x40C8
0x40C9
Table 77. GPIO Pin Functionality Bit Settings
GPIOx[3:0] Bits
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Table 78. GPIO Pin Control Registers
Register
R48
R49
R50
R51
2
C/SPI port control mode, the pins are set through writes to memory locations described in Table 31. The value of the optional internal
Bit 7
Decimal
16,582
16,583
16,584
16,585
Address
GPIO Pin Function
Input without debounce (default)
Input with debounce (0.3 ms)
Input with debounce (0.6 ms)
Input with debounce (0.9 ms)
Input with debounce (5 ms)
Input with debounce (10 ms)
Input with debounce (20 ms)
Input with debounce (40 ms)
Input controlled by I
Output set by I
Output set by I
Output set by DSP core, with pull-up
Output set by DSP core, no pull-up
Reserved
Output CRC error (sticky)
Output watchdog error (sticky)
Hex
0x40C6
0x40C7
0x40C8
0x40C9
Bit 6
Reserved
Reserved
Reserved
Reserved
Bit Name
GPIO0[3:0]
GPIO1[3:0]
GPIO2[3:0]
GPIO3[3:0]
2
2
C/SPI port, with pull-up
C/SPI port, no pull-up
Bit 5
2
C/SPI port
Description
GPIO 0 pin function (see Table 77)
GPIO 1 pin function (see Table 77)
GPIO 2 pin function (see Table 77)
GPIO 3 pin function (see Table 77)
Rev. 0 | Page 77 of 88
Bit 4
Bit 3
Bit 2
GPIO0[3:0]
GPIO1[3:0]
GPIO2[3:0]
GPIO3[3:0]
Bit 1
ADAU1461
Bit 0