ADT7470ARQZ-REEL Analog Devices Inc, ADT7470ARQZ-REEL Datasheet - Page 8

• Manufacturer Part Number: ADT7470ARQZ-REEL
• Description: IC,Motor Controller,SSOP,16PIN
• Manufacturer: Analog Devices Inc

Specifications of ADT7470ARQZ-REEL

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Control, Register Bank
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Type: I²C™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADT7470EBZ - BOARD EVALUATION FOR ADT7470
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7470
GENERAL-PURPOSE I/O PINS (OPEN DRAIN)
The ADT7470 has four pins that can be configured as either general-purpose logic pins or as PWM outputs. Each GPIO pin has a
corresponding enable, direction, polarity and status bit.
Pin
GPIO1
GPIO2
GPIO3
GPIO4
To enable the PWM output on the ADT7470 as GPIOs, the enable bits in Register 0x7F must be set to 1.
Setting a direction bit to 1 in the GPIO configuration register makes the corresponding GPIO pin an output. Clearing the direction bit to
0 makes it an input.
Setting a polarity bit to 1 makes the corresponding GPIO pin active high. Clearing the polarity bit to 0 makes it active low.
When a GPIO pin is configured as an input, the corresponding bit in the GPIO status register is read-only and is set when the input is
asserted. When a GPIO pin is configured as an output, the corresponding bit in one of the GPIO status registers becomes read/write.
Setting this bit asserts the GPIO output. Note that whether a GPIO pin is configured as an input or as an output, asserted can be high or
low, depending on the setting of the polarity bit.
Function
Enable
Direction
Polarity
Status
Enable
Direction
Polarity
Status
Enable
Direction
Polarity
Status
Enable
Direction
Polarity
Status
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Register Address and Bit
0x7F [3]
0x80 [7]
0x80 [6]
0x81 [4]
0x7F [2]
0x80 [5]
0x80 [4]
0x81 [5]
0x7F [1]
0x80 [3]
0x80 [2]
0x81 [6]
0x7F [0]
0x80 [1]
0x80 [0]
0x81 [7]