MK50H27PLCC datasheet(29/56 Pages) STMICROELECTRONICS

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4.2.3 Protocol Parameters

PARM

DESCRIPTION

PROTOCOL OPTIONS. Defines the SS7 protocol options to be used.

BIT

NAME

DEFINITION

DBUSY

DBUSY = 1: Disables busy mechanisms on both transmit and receive.

Missed MSU interrupts (CSR0<06>, MISS) are not affected by this bit.

XYEL

XYEL= 0: Transmitted SINs and SIEs conform to CCITT

Red/Blue Book definitions (SF = 1 and 2 respectively). XYEL= 1:

Transmitted SINs and SIEs conform to CCITT Yellow Book defini-

tions (SF = 9 & 10 respectively).

RYEL

RYEL= 0: Only CCITT Red/Blue Book definitions for received SINs

and SIEs are accepted.

RYEL= 1: Either CCITT Yellow or Red/Blue Book definitions for re-

ceived SINs and SIEs are accepted.

RMODE Defines the retransmission method to be used.

RMODE = 0: specifies Basic Error Recovery (BEC).

RMODE = 1: specifies Preventive Cyclic Redundancy(PCR).

BECDOUBLE Provides double transmission of all MSUs in BEC. All MSU’s

including those sent during negative acknowledgement are transmit-

ted twice. If RMODE= 0 then the following definitions apply:

BECDOUBLE = 0: specifies normal BEC.

BECDOUBLE = 1: specifies BEC with doubletransmission.

NOTE: BECDOUBLE must be 0 if RMODE = 1.

ERMEN Enables the AERM and SUERM error rate monitors.

ERMEN = 0: disables the AERM and SUERM.

ERMEN = 1: enables the AERM and SUERM.

OCTEN Enables octet counting.

OCTEN = 0: disables octet counting.

OCTEN = 1: enables octet counting.

2/3EN

Enables 2/3 errored FIB/BSN error monitoring.

2/3EN = 0: disables 2/3 error monitoring.

2/3EN = 1: enables 2/3 error monitoring.

ANSIT6/T7 Selects ANSI or ITU compliance for SS7 T6 & T7 timers

ANSIT6/T7 =0: T6 & T7 timer operation complies with ITU Q.703

ANSIT6/T7 =1: T6 & T7 timer operation complies with ANSI T1.111.3

15-09

RESERVED Must be programmed with all zeroes.

IADR + 26

IADR + 28

IADR + 30

IADR + 32

IADR + 34

Tin

Tie

MK50H27

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