MT9072 Zarlink Semiconductor, Inc., MT9072 Datasheet - Page 210

• Manufacturer Part Number: MT9072
• Description: Octal T1-E1-J1 Framer
• Manufacturer: Zarlink Semiconductor, Inc.

MT9072
16.2.11
Table 192 describes the bit functions of each (5 registers in total, one register for each bit position) of the
Transmit 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). In addition, a simultaneous write to all
8 framers is possible by setting the MSB address to Y=8 (1000). 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 YB0 to YB4. Address YB0 corresponds to bit position 4
(TN0=Sa4) and address YC4 corresponding to bit position 8 (TN4=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.
210
15-8
Bit
7
6
5
4
3
2
1
0
Transmit National Bit RN Data Registers (YB0- YB4) Bit Functions
TNnF11
TNnF13
TNnF15
TNnF1
TNnF3
TNnF5
TNnF7
TNnF9
Name
(####
####)
(0000
0000)
Table 193 - Transmit National Bits (Sa4 - Sa8) TNn (n = 0 to 4) Data Register
not used.
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
(R/W Address YB0 to YB4) (E1)
Functional Description
Advance Information