ADM1029ARQZ-R7 datasheet(28/50 Pages) ONSEMI

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Rev. 1 | Page 28 of 50 | www.onsemi.com

BIT 0 = 1

RUN FAN 1 AT ALARM OR HOT-PLUG SPEED IF GPIO PIN IS ASSERTED

BIT 1 = 1

RUN FAN 2 AT ALARM OR HOT-PLUG SPEED IF GPIO PIN IS ASSERTED

BITS 2 – 7

RESERVED – READ BACK ZERO

BIT 0 = 1

PIN 19 CONFIGURED AS GPIO0

BIT 1 = 1

PIN 20 CONFIGURED AS GPIO1

BIT 2 = 1

PIN 11 CONFIGURED AS GPIO2

BIT 3 = 1

PIN 13 CONFIGURED AS GPIO3

BIT 4 = 1

PIN 14 CONFIGURED AS GPIO4

BIT 5 = 1

PIN 16 CONFIGURED AS GPIO5

BIT 6 = 1

PIN 17 CONFIGURED AS GPIO6

BIT 7

RESERVED

ENABLE PINS FOR GPIO

FUNCTION

(REGISTER 0x05)

CONFIGURE GPIO PINS

BEHAVIOR

GPIO0 (REG 0x28)

GPIO6 (REG 0x2E)

CONFIGURE GPIO EVENT

MASK

GPIO0 (REG 0x38)

GPIO6 (REG 0x3E)

FAN 1 RUNS AT HOT-PLUG

OR ALARM SPEED

GPIO PINS ENABLE (REG 0x05)

GPIO EVENT MASK (CONFIGURE REG 0x38 FOR GPIO0, REG 0x39 FOR

GPIO1.....REG 0x3E FOR GPIO6)

IS GPIO

PIN ASSERTED?

YES

BIT 0

SETS THE DIRECTION FOR GPIO PIN. A '0' CONFIGURES THE PIN AS AN OUTPUT, A '1' SETS

THE PIN UP AS AN INPUT

BIT 1

SETS THE POLARITY FOR GPIO PIN. A '0' MAKES THE PIN ACTIVE LOW, A '1' MAKES THE PIN

ACTIVE HIGH

BIT 2 = 1

IF GPIO PIN IS CONFIGURED AS AN INPUT, CFAULT IS ASSERTED WHEN GPIO IS ASSERTED.

IF GPIO PIN IS CONFIGURED AS AN OUTPUT, GPIO PIN WILL BE ASSERTED IF A HIGH

TEMPERATURE LIMIT IS EXCEEDED. THIS CAN BE USED TO SHUT DOWN THE SYSTEM IN AN

OVER-TEMPERATURE SITUATION.

BIT 3 = 1

IF GPIO PIN IS CONFIGURED AS AN INPUT, INT IS ASSERTED WHEN GPIO IS ASSERTED. IF GPIO

PIN IS AN OUTPUT, GPIO IS ASSERTED IF A TEMPERATURE LOW LIMIT IS EXCEEDED.

BIT 4 = 1

IF GPIO PIN IS CONFIGURED AS AN INPUT, FANS GO TO ALARM SPEED IF GPIO IS ASSERTED. IF

GPIO PIN IS AN OUTPUT, GPIO IS ASSERTED IF A FAN TACH LIMIT IS EXCEEDED.

BIT 5 = 1

IF GPIO PIN IS CONFIGURED AS AN INPUT, FANS GO TO HOT-PLUG SPEED IF GPIO IS ASSERTED.

IF GPIO PIN IS AN OUTPUT, GPIO IS ASSERTED IF A FAN FAULT IS DETECTED (FAULT PIN).

BIT 6 = 1

IF GPIO PIN IS AN INPUT, THIS BIT REFLECTS THE STATE OF GPIO PIN. IF GPIO PIN IS AN

OUTPUT, GPIO IS ASSERTED IF AN AIN HIGH LIMIT IS EXCEEDED.

BIT 7

IF GPIO PIN IS AN INPUT, THIS BIT LATCHES A GPIO ASSERTION EVENT. CLEARED BY

WRITING A '0.' IF GPIO PIN IS AN INPUT, GPIO IS ASSERTED IF AN AIN LOW LIMIT IS EXCEEDED.

GPIO PINS BEHAVIOR (REG 0x28 CONFIGURES GPIO0, REG 0x29 CONFIGURES GPIO1, ETC.)

IS GPIO

PIN ASSERTED?

YES

FAN 2 RUNS AT HOT-PLUG

OR ALARM SPEED

Figure 19. Configuring GPIO Pins

ADM1029

ADM1029ARQZ-R7 数据表(PDF) 28 Page - ON Semiconductor

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