EMC2302 datasheet(42/70 Pages) MICROCHIP

42 / 70 page

EMC2301/2/3/5

DS20006532A-page 42

 2021 Microchip Technology Inc.

6.18

Maximum Step Size Register

This register determines the maximum step size for the

ramp rate control (see Section 4.3.3.3 “Fan Drive

Max Step” and Section 4.10 “Ramp Rate Control”).

The contents of the register represent the weighting of

each bit in determining the final maximum step size for

the ramp rate control.

6.19

Fan Minimum Drive Register

The Fan Minimum Drive Register (see Section 4.3.3.4

“Minimum Drive Setting”) stores the minimum drive

setting for each RPM-based Fan Speed Control

algorithm. The contents of the register represent the

weighting of each bit in determining the final minimum

fan driver setting.

MAX STEP - MAXIMUM STEP SIZE REGISTER

(ADDRESSES 37H, 47H, 57H, 67H, 77H)

U-0

RW-0

—

FxMS[5:0]

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-6

Unimplemented bits, read as ‘0’.

bit 5-0

FxMS[5:0]: Fan Drive Max Step size, where “x” represents 1 through 5 based on device features.

MIN DRIVE - FAN SETTING DRIVE MINIMUM VALUE REGISTER

(ADDRESSES 38H, 48H, 58H, 68H, 78H)

RW-0

FxMS[7:0]

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-0

FxMS[7:0]: Fan Drive Min Step size, where “x” represents 1 through 5 based on device features.

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