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SBAS387A – MAY 2009 – REVISED JUNE 2010
(continued)
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D5–D2
R/W
00 00
GPIO2 Control
0000: GPIO2 input/output disabled
0001: GPIO2 input is used for secondary BCLK, secondary WCLK, secondary DIN or secondary
ADC_WCLK input
0010: GPIO2 is general purpose input (GPI)
0011: GPIO2 is general purpose output
0100: GPIO2 output is CLKOUT
0101: GPIO2 output is INT1 (active high)
0110: GPIO2 output is inverted INT1 (active low)
0111: GPIO2 output is INT1 (open drain)
1000: GPIO2 output is INT2 (active high)
1001: GPIO2 output is inverted INT2 (active low)
1010: GPIO2 output is INT2 (open drain)
1011: GPIO2 output is ADC_WCLK for Audio Interface
1100: GPIO2 output is secondary bit-clock for Audio Interface
1101: GPIO2 output is secondary word-clock for Audio Interface
1110: GPIO2 output is clock for the digital microphone
1111: Reserved
D1
R
X
GPIO2 Input Pin state as a GPI
D0
R/W
0
GPIO2 as general purpose output control
0: GPIO2 pin is driven to '0' in general purpose output mode
1: GPIO2 pin is driven to '1' in general purpose output mode
6.2.114 Page 0 / Register 122:
GPIO3/DIGMIC_CLK Control Register
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D6
R
00
Reserved. Write only default values
D5–D2
R/W
00 00
GPIO3/DIGMIC_CLK Control
0000: GPIO3/DIGMIC_CLK input/output disabled
0001: GPIO3/DIGMIC_CLK input is used for secondary BCLK, secondary WCLK, secondary DIN
or secondary ADC_WCLK input
0010: GPIO3/DIGMIC_CLK is general purpose input (GPI)
0011: GPIO3/DIGMIC_CLK is general purpose output
0100: GPIO3/DIGMIC_CLK2 output is CLKOUT
0101: GPIO3/DIGMIC_CLK output is INT1 (active high)
0110: GPIO3/DIGMIC_CLK output is inverted INT1 (active low)
0111: GPIO3/DIGMIC_CLK output is INT1 (open drain)
1000: GPIO3/DIGMIC_CLK output is INT2 (active high)
1001: GPIO3/DIGMIC_CLK output is inverted INT2 (active low)
1010: GPIO3/DIGMIC_CLK output is INT2 (open drain)
1011: GPIO3/DIGMIC_CLK output is ADC_WCLK for Audio Interface
1100: GPIO3/DIGMIC_CLK output is secondary bit-clock for Audio Interface
1101: GPIO3/DIGMIC_CLK output is secondary word-clock for Audio Interface
1110: GPIO3/DIGMIC_CLK output is clock for the digital microphone
1111: GPIO3/DIGMIC_CLK output is clock for the digital microphon
D1
R
X
GPIO3/DIGMIC_CLK Input Pin state as a GPI
D0
R/W
0
GPIO3/DIGMIC_CLK as general purpose output control
0: GPIO3/DIGMIC_CLK pin is driven to '0' in general purpose output mode
1: GPIO3/DIGMIC_CLK pin is driven to '1' in general purpose output mode
6.2.115 Page 0 / Register 123:
GPIO4/DIGMIC_DATA Control Register
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D6
R
00
Reserved. Write only default values
Copyright 2009–2010, Texas Instruments Incorporated
REGISTER MAP
119