參數(shù)資料
型號： EVAL-ADAU1781Z
廠商： Analog Devices Inc
文件頁數(shù)： 83/92頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADAU1781
標準包裝： 1
系列： SigmaDSP®
主要目的： 音頻編解碼器
嵌入式： 是，DSP
已用 IC / 零件： ADAU1781
主要屬性： 立體聲，24 位，8 ~ 96 kHz 采樣率，GUI 工具
次要屬性： *
已供物品： *
ADAU1781
Rev. B | Page 84 of 92
Register 16582 to Register 16586 (0x40C6 to 0x40CA),
GPIO Pin Control
Bits[3:0], GPIO Pin Function
The GPIO pin control register sets the functionality of each GPIO
pin as depicted in Table 74. GPIO0 to GPIO3 use the same pins
as the serial port and must be enabled in Register 16628 (0x40F4),
serial data/GPIO pin configuration. Pin 7 is a dedicated GPIO.
The GPIO pin can be set directly by the SigmaDSP core and
therefore should be set as 1011 or 1100 (outputs set by the
SigmaDSP core). In order for GPIO0 through GPIO3 to be used,
they should be configured as 1001 or 1010 (outputs set by the
I2C/SPI port).
There are five GPIO pin value registers that allow the input/output
data value of the GPIO pin to be written to or read directly from
the control port. The corresponding addresses are listed in Table 75.
Each value register contains four bytes and can store only one of
two values: logic high or logic low. Logic high is stored as 0x00,
0x80, 0x00, 0x00. Logic low is stored as 0x00, 0x00, 0x00, 0x00.
Table 73. GPIO Pin Control Registers
Address
Decimal
Hex
Register
Bits
Description
Default
16582
0x40C6
GPIO pin control
[7:4]
Reserved
[3:0]
Dedicated GPIO (Pin 7) function (see Table 74)
1100
16583
0x40C7
GPIO0 control
[7:4]
Reserved
[3:0]
GPIO0 pin function (see Table 74)
1100
16584
0x40C8
GPIO1 control
[7:4]
Reserved
[3:0]
GPIO1 pin function (see Table 74)
1100
16585
0x40C9
GPIO2 control
[7:4]
Reserved
[3:0]
GPIO2 pin function (see Table 74)
1100
16586
0x40CA
GPIO3 control
[7:4]
Reserved
[3:0]
GPIO3 pin function (see Table 74)
1100
Table 74. GPIO Pin Functions
GPIO Bits[3:0]
GPIO Pin Function
0000
Input without debounce
0001
Input with debounce (0.3 ms)
0010
Input with debounce (0.6 ms)
0011
Input with debounce (0.9 ms)
0100
Input with debounce (5 ms)
0101
Input with debounce (10 ms)
0110
Input with debounce (20 ms)
0111
Input with debounce (40 ms)
1000
Input controlled by I2C/SPI port
1001
Output set by I2C/SPI port with pull-up
1010
Output set by I2C/SPI port without pull-up
1011
Output set by SigmaDSP core with pull-up
1100
Output set by SigmaDSP core without pull-up
1101
Reserved
1110
Output CRC error (sticky)
1111
Output watchdog error (sticky)
Register 1000 to Register 1004 (0x03E8 to 0x03EC), GPIO Pin Value
Table 75. Addresses of GPIO Pin Value Registers
Address
Register
Decimal
Hex
1000
0x03E8
GPIO pin value, GPIO
1001
0x03E9
GPIO pin value, GPIO0
1002
0x03EA
GPIO pin value, GPIO1
1003
0x03EB
GPIO pin value, GPIO2
1004
0x03EC
GPIO pin value, GPIO3
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