DS2196 datasheet(60/157 Pages) DALLAS

60 / 157 page

DS2196

60 of 157

SR2A: STATUS REGISTER 2 FRAMER A (Address = 21 Hex)

(MSB)

(LSB)

RMF

TMF

SEC

RFDL

TFDL

RMTCH

RAF

–

SYMBOL

POSITION

NAME AND DESCRIPTION

RMF

SR2A.7

Receive Multiframe. Set on receive multiframe boundaries.

TMF

SR2A.6

Transmit Multiframe. Set on transmit multiframe boundaries.

SEC

SR2A.5

One Second Timer. Set on increments of one second based on

RCLK; will be set in increments of 999 ms, 999 ms, and 1002

ms every 3 seconds. Set on increments of 42 ms (333 frames) if

CCR3A.2 = 1.

RFDL

SR2A.4

Receive FDL Buffer Full. Set when the receive FDL buffer

(RFDL) fills to capacity (8 bits).

TFDL

SR2A.3

Transmit FDL Buffer Empty. Set when the transmit FDL

buffer (TFDL) empties.

RMTCH

SR2A.2

Receive FDL Match Occurrence. Set when the RFDL

matches either RMTCH1A or RMTCH2A.

RAF

SR2A.1

Receive FDL Abort. Set when eight consecutive 1’s’s are

received in the FDL.

–SR2A.0

Not Assigned. Could be any value when read.

SR2B: STATUS REGISTER 2 FRAMER B (Address = C1 Hex)

(MSB)

(LSB)

RMF

TMF

SEC

RFDL

TFDL

RMTCH

RAF

–

SYMBOL

POSITION

NAME AND DESCRIPTION

RMF

SR2B.7

Receive Multiframe. Set on receive multiframe boundaries.

TMF

SR2B.6

Transmit Multiframe. Set on transmit multiframe boundaries.

SEC

SR2B.5

One Second Timer. Set on increments of one second based on

RCLK; will be set in increments of 999 ms, 999 ms, and 1002

ms every 3 seconds. Set on increments of 42 ms (333 frames) if

CCR3B.2 = 1.

RFDL

SR2B.4

Receive FDL Buffer Full. Set when the receive FDL buffer

(RFDL) fills to capacity (8 bits).

TFDL

SR2B.3

Transmit FDL Buffer Empty. Set when the transmit FDL

buffer (TFDL) empties.

RMTCH

SR2B.2

Receive FDL Match Occurrence. Set when the RFDL

matches either RMTCH1B or RMTCH2B.

RAF

SR2B.1

Receive FDL Abort. Set when eight consecutive 1’s’s are

received in the FDL.

–SR2B.0

Not Assigned. Could be any value when read.

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