Datasheet

ADAU1701 Data Sheet
Rev. C | Page 42 of 52
2080 TO 2081 (0x0820 TO 0x0821)—
MULTIPURPOSE PIN CONFIGURATION REGISTERS
Each multipurpose pin can be set to different functions from
these registers (2080 to 2081). The two 3-byte registers are
broken up into 12 4-bit (nibble) sections that each control a
different MP pin. Table 53 lists the function of each nibble
setting within the MP pin configuration registers. The MSB of
each pin’s 4-bit configuration inverts the input to or output
from the pin. The internal pull-up resistor (approximately
10 kΩ) of each MP pin is enabled when it is set as a digital input
(either a GPIO input or a serial data port input).
Table 51. Register 2080 Bit Map
D23 D22 D21 D20 D19 D18 D17 D16
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
MP53 MP52 MP51 MP50 MP43 MP42 MP41 MP40 0x00
MP33 MP32 MP31 MP30 MP23 MP22 MP21 MP20 MP13 MP12 MP11 MP10 MP03 MP02 MP01 MP00 0x0000
Table 52. Register 2081 Bit Map
D23 D22 D21 D20 D19 D18 D17 D16
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
MP113 MP112 MP111 MP110 MP103 MP102 MP101 MP100 0x00
MP93 MP92 MP91 MP90 MP83 MP82 MP81 MP80 MP73 MP72 MP71 MP70 MP63 MP62 MP61 MP60 0x0000
Table 53.
Bit Name Description
MPx[3:0] Set the function of each multipurpose pin.
MPx[3:0] Setting
1111 Auxiliary ADC input (see Table 62)
1110
Reserved
1101 Reserved
1100 Serial data port—inverted (see Table 64)
1011 Open-collector output—inverted
1010 GPIO output—inverted
1001 GPIO input, no debounce—inverted
1000 GPIO input, debounced—inverted
0111 N/A
0110 Reserved
0101 Reserved
0100 Serial data port (see Table 64)
0011 Open-collector output
0010 GPIO output
0001 GPIO input, no debounce
0000 GPIO input, debounced