STLC5460 datasheet(23/54 Pages) STMICROELECTRONICS

23 / 54 page

BYTE

New byte.

Byte = 1 A new byte is available in the Source Register

EOM

End of Message

EOM = 1 : there is no significant byte in the Source Register. The previous byte which

had been received was the last.

R/W = 0

Write auxiliary memory.

Writing initiates the RX Monitor Channel.

CR0/CR5

not used

SOURCE REGISTER (SRC)

When the bit CM of command register is at one, this register contains the data to be written in the control

memory at the address indicated by the destination Register. It rappresents the address of the data

memory, or of one of the insert register, corresponding to the input data to be switched to the output indi-

cated by the destination register.

Following you will find a detailed explanation case by case of the meaning of all the bits of this register.

First case CM = 1 (Bit of Command Register)

Command Memory is selected.

PCM

SR6

SR5

SR4

SR3

SR2

SR1

SR0

After Reset 00 (H)

PCM = 1

The source is PCM Input.

PCM = 0

The source is not PCM. The Source is either Multiplex Inputs (GCI) or Insert Registers.

PCM = 1

PCM

SR6

SR5

SR4

SR3

SR2

SR1

SR0

TS4

TS3

TS2

TS1

TS0

After Reset 00 (H)

If PCM is at 2 Mb/s

N0/1

PCM Number : 0 to 3

TS0/4

Time Slot Number : 0 to 31

If PCM is at 4 Mb/s

PCM at 4 Mb/s : 0 or 1

TS0/4 and N0

Time slot Number : 0 to 63

N0 = TS5

If PCM is at 8 Mb/s

TS0/4 and N0/1

Time Slot Number : 0 to 127.

N0 = TS5, N1 = TS6.

PCM = 0

The Source is Multiplex Input or Insertion Register.

N1 = 0

Multiplexes are selected (GCI or not) then

N0 = 0

Multiplex number : 0

STLC5460

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