DS2196 datasheet(64/157 Pages) MAXIM

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DS2196

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IMR2B: INTERRUPT MASK REGISTER 2 FRAMER B (Address = EF Hex)

(MSB)

(LSB)

RMF

TMF

SEC

RFDL

TFDL

RMTCH

RAF

–

SYMBOL

POSITION

NAME AND DESCRIPTION

RMF

IMR2B.7

Receive Multiframe.

0 = interrupt masked

1 = interrupt enabled

TMF

IMR2B.6

Transmit Multiframe.

0 = interrupt masked

1 = interrupt enabled

SEC

IMR2B.5

One Second Timer.

0 = interrupt masked

1 = interrupt enabled

RFDL

IMR2B.4

Receive FDL Buffer Full.

0 = interrupt masked

1 = interrupt enabled

TFDL

IMR2B.3

Transmit FDL Buffer Empty.

0 = interrupt masked

1 = interrupt enabled

RMTCH

IMR2B.2

Receive FDL Match Occurrence.

0 = interrupt masked

1 = interrupt enabled

RAF

IMR2B.1

Receive FDL Abort.

0 = interrupt masked

1 = interrupt enabled

–IMR2B.0

Not Assigned. Should be set to 0 when written to.

8. ERROR COUNT REGISTERS

There is a set of three counters per framer that record bipolar violations, excessive zeros, errors in the

CRC6 code words, framing bit errors, and number of multiframes that the device is out of receive

synchronization. Each of these three counters can be automatically updated on either one second

boundaries (CCR3.2=0) or every 42 ms (CCR3.2=1) as determined by the timer in Status Register 2

(SR2.5) or manually (CCR6.6=1 and triggering with CCR6.5). When updated automatically, the user

can use the interrupt from the one-second timer to determine when to read these registers. The user has a

full second (or 42 ms) to read the counters before the data is lost. All three counters will saturate at their

respective maximum counts and they will not rollover (note: only the Line Code Violation Count Register

has the potential to over-flow but the bit error would have to exceed 10E-2 before this would occur).

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