MEC1322 datasheet(282/456 Pages) MICROCHIP

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MEC1322

DS00001719D-page 282

 2014 - 2015 Microchip Technology Inc.

10 TACH_READING_MODE_SELECT

1=Counter is incremented on the rising edge of the 100kHz_Clk input.

The counter is latched into the TACHX_COUNTER field and

reset when the programmed number of edges is detected.

0=Counter is incremented when Tach Input transitions from low-to-

high state (default)

R/W

VCC1_

RESET

9 Reserved

8 FILTER_ENABLE

This filter is used to remove high frequency glitches from Tach Input.

When this filter is enabled, Tach input pulses less than two 100kHz_-

Clk periods wide get filtered.

1= Filter enabled

0= Filter disabled (default)

It is recommended that the Tach input filter always be enabled.

R/W

VCC1_

RESET

7:2 Reserved

1 TACH_ENABLE

This bit gates the clocks into the block. When clocks are gated, the

TACHx pin is tristated. When re-enabled, the internal counters will

continue from the last known state and stale status events may still

be pending. Firmware should discard any status or reading values

until the reading value has been updated at least one time after the

enable bit is set.

1= TACH Monitoring enabled, clocks enabled.

0= TACH Idle, clocks gated

R/W

VCC1_

RESET

0 TACH_OUT_OF_LIMIT_ENABLE

This bit is used to enable the TACH_OUT_OF_LIMIT_STATUS bit in

the TACHx Status Register to generate an interrupt event.

1=Enable interrupt output from Tach block

0=Disable interrupt output from Tach block (default)

R/W

VCC1_

RESET

Offset

00h

Bits

Description

Type

Default

Reset

Event

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