TXC-05802AIPQ Transwitch Corporation, TXC-05802AIPQ Datasheet - Page 19

• Manufacturer Part Number: TXC-05802AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-05802AIPQ

• Operating Supply Voltage (typ): 3.3/5V
• Operating Temperature Classification: Industrial
• Package Type: PQFP
• Mounting: Surface Mount
• Pin Count: 208
• Lead Free Status / Rohs Status: Not Compliant

Word Ordering for 16-Bit Cell Interface Mode
The word ordering for 16-Bit mode is shown in Figure 13.
TRAFFIC MANAGEMENT FUNCTIONS
Dynamic Generic Flow Control (GFC) Field Insertion
The CUBIT- Pro can insert the value of the first nibble of the ATM cell header in real time. The value of the GFC
nibble is supplied to the CUBIT- Pro via the input pins GFC(3-0). The insertion of the GFC value is enabled via
the control bit GFCENA.
If control bit GFCENA (Control Register Address 0CH, Bit 1) is set to one, then the state of the four Generic
Flow Control input pins GFC(3-0) will be accepted during the leading rising edge of the clock for the first byte of
the ATM cell header and inserted as an outgoing GFC on the following cell (see timing diagram in Figure 47 for
details). Therefore the GFC value is inserted into the next outgoing cell.
Transferred
Transferred
First Word
Last Word
CellBusBusRH MSB
TandemRH MSB
High Byte
GFC, VPI
Byte 42
Byte 44
Byte 46
Byte 0
Byte 2
HEC
VCI
29-Word Inlet
Figure 13. Word Ordering on Cell Inlet and Outlet in 16-Bit Mode
Figure 14. GFC Insertion on the Outlet Queue (GFCENA = 1)
CellBusBusRH LSB
TandemRH LSB
VCI, PT, CLP
Low Byte
Undefined
VPI, VCI
Byte 43
Byte 45
Byte 47
Byte 1
Byte 3
GFC Value
Cell Data
Output
CellBusBusRH MSB
High Byte
GFC, VPI
Byte 42
Byte 44
Byte 46
Byte 0
Byte 2
HEC
VCI
28-Word Inlet
4
8
CellBusBusRH LSB
Low Byte
VCI, PT, CLP
Undefined
VPI, VCI
- 19 -
Byte 43
Byte 45
Byte 47
Byte 1
Byte 3
CUBIT- Pro Cell Outlet Port
Calculation
HEC
TandemRH MSB
High Byte
GFC, VPI
Byte 42
Byte 44
Byte 46
Byte 0
Byte 2
HEC
VCI
28-Word Outlet
TandemRH LSB
VCI, PT, CLP
Low Byte
Undefined
VPI, VCI
Byte 43
Byte 45
Byte 47
Byte 1
Byte 3
GFCENA Bit
Outlet Queue
High Byte
GFC, VPI
Cell from
Byte 42
Byte 44
Byte 46
Byte 0
Byte 2
HEC
Ed. 3, November 1999
27-Word Outlet
VCI
TXC-05802
CUBIT- Pro
TXC-05802-MB
VCI, PT, CLP
Low Byte
Undefined
VPI, VCI
Byte 43
Byte 45
Byte 47
Byte 1
Byte 3