參數(shù)資料
型號(hào)： ADAU1461WBCPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 43/88頁(yè)
文件大?。?/td> 0K
描述： IC SIGMADSP 24BIT 96KHZ PLL 32
標(biāo)準(zhǔn)包裝： 1
系列： SigmaDSP®
類型： 音頻處理器
應(yīng)用： 車載音頻
安裝類型： 表面貼裝
封裝/外殼： 32-VFQFN 裸露焊盤(pán)，CSP
供應(yīng)商設(shè)備封裝： 32-LFCSP-VQ
包裝： 托盤(pán)
ADAU1461
Rev. 0 | Page 48 of 88
GENERAL-PURPOSE INPUT/OUTPUT
The serial data input/output pins (Pin 26 to Pin 29) are shared
with the general-purpose input/output function. Each of these
four pins can be set to only one of these functions. The function
of these pins is set in the serial data/GPIO pin configuration
register (Register R60, Address 0x40F4).
The GPIOx pins can be used as inputs or outputs. These pins
are readable and can be set through the control port or directly
by the SigmaDSP core. When configured as inputs, the GPIOx
pins can be used with push-button switches or rotary encoders
to control DSP program settings. These pins can also be used
with digital outputs to drive LEDs or external logic to indicate
the status of internal signals and control other devices. Examples
of this use include indicating signal overload, signal present,
and button press confirmation.
When configured as an output, each GPIO pin can typically
drive 2 mA, which is enough current to directly drive some
high efficiency LEDs. Standard LEDs require about 20 mA of
current and can be driven from a GPIO output with an external
transistor or buffer. Because of problems that can arise from
simultaneously driving or sinking a large amount of current on
many pins, avoid connecting high efficiency LEDs directly to
many or all of the GPIO pins when designing the application.
If many LEDs are required, use an external driver. When the
GPIO pins are configured as open-collector outputs, they
should be pulled up to a maximum voltage equal to the voltage
set on IOVDD.
The configuration of the GPIO functions is set up in the
GPIO pin control registers (Register R48 to Register R51,
Address 0x40C6 to Address 0x40C9).
GPIO PINS SET FROM THE CONTROL PORT
The GPIO pins can also be configured to be directly controlled
from the I2C/SPI control port. When the pins are set to this
mode, four memory locations are enabled for the GPIO pin
settings. The physical settings on the GPIO pins mirror the
settings of the LSB of these 4-byte-wide memory locations.
Table 31. GPIOx Pin Memory Settings (Set from Control Port)
Memory Location
Decimal
Hex
Bits[31:1]
Bit 0
1568
0x0620
Reserved
GPIO0SET
1569
0x0621
Reserved
GPIO1SET
1570
0x0622
Reserved
GPIO2SET
1571
0x0623
Reserved
GPIO3SET
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