DS2196 Datasheet, PDF (73/157 Pages) Dallas Semiconductor – T1 Dual Framer LIU

TIR1A/TIR2A/TIR3A: TRANSMIT IDLE REGISTERS FRAMER A
(Address = 3C to 3E Hex)
TIR1B/TIR2B/TIR3B: TRANSMIT IDLE REGISTERS FRAMER B
(Address = DC to DE Hex)
[Also used for Per–Channel Loopback]
DS2196
(MSB)
CH8
CH16
CH24
CH7
CH15
CH23
CH6
CH14
CH22
CH5
CH13
CH21
CH4
CH12
CH20
CH3
CH11
CH19
CH2
CH10
CH18
(LSB)
CH1
CH9
CH17
TIR1
TIR2
TIR3
SYMBOLS
CH1-24
POSITIONS
TIR1.0-3.7
NAME AND DESCRIPTION
Transmit Idle Code Insertion Control Bits.
0 = do not insert the Idle Code in the TIDR into this channel
1 = insert the Idle Code in the TIDR into this channel
NOTE:
If CCR4.0=1, then a 0 in the TIRs implies that channel data is to be sourced from TSER and a 1 implies
that channel data is to be sourced from the output of the receive side framer (i.e., Per–Channel Loopback;
see Figure 1–1).
TIDRA: TRANSMIT IDLE DEFINITION REGISTER FRAMER A
(Address = 3F Hex)
TIDRB: TRANSMIT IDLE DEFINITION REGISTER FRAMER B
(Address = DF Hex)
(MSB)
TIDR7
TIDR6
TIDR5
TIDR4
TIDR3
TIDR2
TIDR1
(LSB)
TIDR0
SYMBOL
TIDR7
TIDR0
POSITION
TIDR.7
TIDR.0
NAME AND DESCRIPTION
MSB of the Idle Code (this bit is transmitted first)
LSB of the Idle Code (this bit is transmitted last)
11.2 RECEIVE SIDE CODE GENERATION
The Receive Mark Registers (RMR1/2/3) are used to determine which of the 24 T1 channels should be
overwritten with either a 7Fh idle code or with a digital milliwatt pattern. The RCR2.7 bit will determine
which code is used. The digital milliwatt code is an eight-byte repeating pattern that represents a 1 kHz
sine wave (1E/0B/0B/1E/9E/8B/8B/9E). Each bit in the RMRs, represents a particular channel. If a bit is
set to a 1, then the receive data in that channel will be replaced with one of the two codes. If a bit is set to
0, no replacement occurs.
73 of 157