MT9072AB datasheet(213/275 Pages) ZARLINK

213 / 275 page

MT9072

Data Sheet

213

Zarlink Semiconductor Inc.

A (0), (1) or (#) in the “Name” column of these tables indicates the state of the data bits after a reset (RESET, RSTC

or RST). The (#) indicates that a (0) or (1) is possible.

17.2.12

Receive National Bit RN Data Registers (YC0- YC4) Bit Functions

Table 193 describes the bit functions of each (5 registers in total, one register for each bit position) of the Receive

National Bits Data Registers in the MT9072. Each register is repeated for each of the 8 framers. Framer 0 is

addressed with Y=0, Framer 1 with Y=1, Framer 2 with Y=2 and so on up to Framer 7 with Y=7 (where Y represents

the 4 most significant address bits (MSB) A11-A8). Each register contains one byte (8-bits) of data corresponding to

eight frames of a particular bit position in timeslot 0. There are 5 registers in total containing 5 bytes of data,

occupying addresses YC0 to YC4 Address YC0 corresponds to bit position 4 (RN0=Sa4) and address YC4

corresponding to bit position 8 (RN4=Sa8).

A (0), (1) or (#) in the “Name” column of these tables indicates the state of the data bits after a reset (RESET, RSTC

or RST). The (#) indicates that a (0) or (1) is possible.

Bit

Name

Functional Description

15-8

(####

####)

not used.

TNnF1

TNnF3

TNnF5

TNnF7

TNnF9

TNnF11

TNnF13

TNnF15

(0000

0000)

Transmit National Bit TNnFm (n = 0 to 4, m = 1, 3, 5 etc. to 15). This bit is transmitted on

the PCM30 link, in bit position n+4 of Timeslot 0 during Frame m (non-frame alignment

signal (NFAS) frames) when CRC-4 multiframe alignment is used, or of consecutive odd

frames when CRC-4 multiframe alignment is not used.

Bit TNnFm is sourced from register address YFn as follows.

TN0Fm = Address YF8 corresponds to transmit national bits Sa4Fm

TN1Fm = Address YF9 corresponds to transmit national bits Sa5Fm

TN2Fm = Address YFA corresponds to transmit national bits Sa6Fm

TN3Fm = Address YFB corresponds to transmit national bits Sa7Fm

TN4Fm = Address YFC corresponds to transmit national bits Sa8Fm

Table 188 - Transmit National Bits (Sa4 - Sa8) TNn (n = 0 to 4) Data Register

(R/W Address YB0 to YB4) (E1)

Bit

Name

Functional Description

15-8

(####

####)

not used.

RNnF1

RNnF3

RNnF5

RNnF7

RNnF9

RNnF11

RNnF13

RNnF15

(0000

0000)

Receive National Bit RNnFm (n = 0 to 4, m = 1, 3, 5 etc. to 15). This bit is received from

the PCM30 link, in bit position n+4 of Timeslot 0 during Frame m (non-frame alignment

signal (NFAS) frames) when CRC-4 multiframe alignment is used, or of consecutive odd

frames when CRC-4 multiframe alignment is not used.

Bit RNnFm is sourced to register address YCn as follows.

RN0Fm = Address YC0 corresponds to receive national bit Sa4Fm

RN1Fm = Address YC1 corresponds to receive national bit Sa5Fm

RN2Fm = Address YC2 corresponds to receive national bit Sa6Fm

RN3Fm = Address YC3 corresponds to receive national bit Sa7Fm

RN4Fm = Address YC4 corresponds to receive national bit Sa8Fm

Table 189 - Receive National Bits (Sa4 - Sa8) RNn

(n = 0 to 4) Data Register (R/W Address YC0 to YC4) (E1)

MT9072AB Datasheet(PDF) 213 Page - Zarlink Semiconductor Inc

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