ADAU1781 Analog Devices, ADAU1781 Datasheet - Page 75

• Manufacturer Part Number: ADAU1781
• Description: SigmaDSP Low-noise Stereo Audio Codec for Portable Applications
• Manufacturer: Analog Devices

Specifications of ADAU1781

• Instructions/cycles: 1024
• Digital I/o Channels: 8/8
• Analog I/o Channels: 2/2
• Product Description: SigmaDSP low-noise stereo audio codec for portable applications

PAD CONFIGURATION
Figure 73 shows a block diagram of the pad design for the GPIO/serial port and communications port pins.
(CONTROLS NUMBER OF PARALLEL TRANSISTOR PAIRS)
DATA IN
IOVDD = 1.8V; LOW = 0.75mA, HIGH = 1.5mA
IOVDD = 3.3V; LOW = 2.0mA, HIGH = 4.0mA
DEBOUNCE
DEBOUNCE
ENABLE
WEAK PULL-DOWN ENABLE
OUTPUT PULL-UP ENABLE
WEAK PULL-UP ENABLE
(CONTROLS PMOS)
DRIVE STRENGTH
OUTPUT ENABLE
DATA OUT
ENABLE
INPUT
Figure 73. Pad Configuration, Internal Design
DIGITAL
SUPPLY
SHIFTER
SHIFTER
SHIFTER
LEVEL
LEVEL
LEVEL
SUPPLY
Rev. B| Page 75 of 92
I/O
PULL-DOWN
PULL-UP
ENABLE
WEAK PULL-UP/PULL-DOWN
ENABLE
190kΩ WORST CASE
240kΩ NOMINAL
INPUT
ESD
CONTROL
OUTPUT
LOGIC
6×
12×
ADAU1781
PAD