adau1442 Analog Devices, Inc., adau1442 Datasheet - Page 68

• Manufacturer Part Number: adau1442
• Description: Sigmadsp Digital Audio Processor With Flexible Audio Routing Matrix
• Manufacturer: Analog Devices, Inc.

MULTIPURPOSE PINS
The ADAU144x includes 12 multipurpose pins that can be used
either as digital general-purpose inputs/outputs (GPIOs) or as
inputs to the 4-channel auxiliary ADC.
Each of the 12 multipurpose pins is controlled by a 4-bit mode.
Pins can be configured as digital inputs, digital outputs, or, when
applicable, as an analog input to the auxiliary ADC. A debounce
circuit is included for use with digital inputs, and it has a range
of selectable time constants between 0.3 μs and 40 μs.
When the inputs or outputs are driven by the control port, the
value can be directly read or controlled by reading or writing
the addresses listed in Table 63.
Each of these registers is four bytes long and is in 5.23 format.
To write a Logic 1, the bytes written should be 0x00, 0x80, 0x00,
and 0x00. To write a Logic 0, the bytes written should be 0x00,
0x00, 0x00, and 0x00.
When the outputs are driven by the core, they are represented
as MP outputs in the SigmaStudio programming tool and are
driven directly from the DSP program in 5.23 format.
Rev. PrA | Page 68 of 92
MULTIPURPOSE PINS MODES AND SETTINGS
Multipurpose Pin Control Registers (Address 0xE204 to
Address 0xE20F)
Table 63. Addresses of Multipurpose Pin Control Registers
Decimal
57860
57861
57862
57863
57864
57865
57866
57867
57868
57869
57870
57871
Table 64. Bit Settings of Multipurpose Pin Control Registers
Bit
Position
[15:4]
[3:0]
Address
Description
Reserved
MP pin mode
0000 = input without a debounce
0001 = input with a debounce of 0.3 ms
0010 = input with a debounce of 0.6 ms
0011 = input with a debounce of 0.9 ms
0100 = input with a debounce of 5 ms
0101 = input with a debounce of 10 ms
0110 = input with a debounce of 20 ms
0111 = input with a debounce of 40 ms
1000 = input driven by control port
1001 = output driven by control port
with pull-up
1010 = output driven by control port
without pull-up
1011 = output driven by core with pull-up
1100 = output driven by core without
pull-up
1101 = input auxiliary ADC
(MP0 to MP3 only)
1110 = output CRC error sticky
1111 = output watchdog error sticky
Hex
E204
E205
E206
E207
E208
E209
E20A
E20B
E20C
E20D
E20E
E20F
Register
Multipurpose Pin Control, MP0
Multipurpose Pin Control, MP1
Multipurpose Pin Control, MP2
Multipurpose Pin Control, MP3
Multipurpose Pin Control, MP4
Multipurpose Pin Control, MP5
Multipurpose Pin Control, MP6
Multipurpose Pin Control, MP7
Multipurpose Pin Control, MP8
Multipurpose Pin Control, MP9
Multipurpose Pin Control, MP10
Multipurpose Pin Control, MP11
Default
0000