EMC2101-R-ACZL-TR datasheet(23/56 Pages) MICROCHIP

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DS20006703A-page 23

EMC2101

5.1

Data Read Interlock

When the External Diode High Byte Register is read,

the External Diode Low byte is copied into an internal

‘shadow’ register. The user is free to read the low byte

at any time and be guaranteed that it will correspond to

the previously read high byte. Regardless if the low

byte is read or not, reading from an External Diode

High Byte Register will automatically refresh this stored

low byte data.

When the TACH Reading Low Byte Register is read,

the TACH Reading high byte is copied into an internal

‘shadow’ register. The user is free to read the high byte

at any time and be guaranteed that it will correspond to

the previously read low byte. Regardless if the high

byte is read or not, reading from the TACH Reading

Low Byte Register will automatically refresh this stored

high byte data.

5.2

The registers are described in detail below. A bit entry

of a ‘—’ indicates that the bit is not used and will always

read ‘0’.

BFh

R/W

Averaging Filter

Selects averaging function for external

diode

00h

FDh

Product ID

16h or 28h

FEh

Manufacturer ID

MCHP

5Dh

FFh

Revision Register

REV

01h

TABLE 5-1:

Address

R/W

Function

Default

Value

Note 1: The Look Up Table Registers are made Read Only if the PWM Program bit (bit 5) in PWM Configuration

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