Abit TX5 User Manual download pdf (Page 16)

COMMERCIAL TEMPERATURE RANGE

IDT7290820 5V TIME SLOT INTERCHANGE

DIGITAL SWITCH 2,048 x 2,048

TABLE 13  CONNECTION MEMORY BITS

TABLE 14  CAB BIT PROGRAMMING FOR DIFFERENT DATA RATES

NOTE:

1. If bit 13 (PC) of the corresponding connection memory location is 1 (device in processor mode), then these entire 8 bits (SAB0, CAB6 - CAB0) are output on the output channel

and stream associated with this location.

Bit Name Description

15 LPBK When 1, the RX n channel m data comes from the TX n channel m. For proper per channel loopback

(Per Channel Loopback) operations, set the delay offset register bits OFn[2:0] to zero for the streams which are in the loopback mode.

14 V/C This bit is used to select between the variable (LOW) and constant delay (HIGH) mode on a

(Variable/Constant per-channel basis.

Throughput Delay)

13 PC When 1, the contents of the connection memory are output on the corresponding output channel and stream.

(Processor Channel) Only the lower byte (bit 7 – bit 0) will be output to the TX output pins. When 0, the contents of the connection

memory are the data memory address of the switched input channel and stream.

12 CCO This bit is output on the CCO pin one channel early. The CCO bit for stream 0 is output first.

(Control Channel Output)

11 OE This bit enables the TX output drivers on a per-channel basis. When 1, the output driver functions

(Output Enable) normally. When 0, the output driver is in a high-impedance state.

10-8,7

(1)

SAB3-0 The binary value is the number of the data stream for the source of the connection.

(Source Stream Address Bits)

6-0

(1)

CAB6-0 The binary value is the number of the channel for the source of the connection.

(Source Channel Address Bits)

1514131211109876543210

LPBK V/C PC CCO OE SAB3 SAB2 SAB1 SAB0 CAB6 CAB5 CAB4 CAB3 CAB2 CAB1 CAB0

Data Rate CAB Bits Used to Determine the Source Channel of the Connection

2.048 Mb/s CAB4 to CAB0 (32 channel/input stream)

4.096 Mb/s CAB5 to CAB0 (64 channel/input stream)

8.192 Mb/s CAB6 to CAB0 (128 channel/input stream)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 26 27

Comments to this Manuals

No comments

Abit TX5 User Manual Page 16

Comments to this Manuals

Related products and manuals for Motherboards Abit TX5