PXB4220E Infineon Technologies AG, PXB4220E Datasheet - Page 27

• Manufacturer Part Number: PXB4220E
• Description: Interworking Element for 8 E1/T1 Lines
• Manufacturer: Infineon Technologies AG

Table 2
Pin No.
U7
W4, Y2,
W3, Y1,
W2
2.2.3
Table 3
Pin No.
Y10
L20
Y5, W5,
M1
Data Sheet
IMA Interface
Symbol
ATBTC
UNCHEC
PN[2:0]
Symbol
TXENB
TXADR[4:0]
UTOPIA Interface (36 pins) (cont’d)
IMA Interface
Input (I)
Output (O)
O
Tri
O
Tri
O
Tri
Input (I)
Output (O)
Slave: I
Master: O
PUA
I
PUA
27
Function
ATM Transmit Buffer Threshold
Crossing
Indicates if the difference between the write
and read pointer of the mapping buffer
became smaller than a SW selectable
threshold
Uncorrectable HEC Error
Indicates if a cell has been discarded due to
an uncorrectable HEC error
Port Number
Indicates the port number where the cell
causing ATBT or UNCHEC being asserted
came from
Function
UTOPIA Transmit Enable
Slave:
ATM layer during cycles when
TXDAT[0:7]
Master:
the PHY layer during cycles when
TXDAT[0:7]
UTOPIA Transmit Address Bus
Five bit wide true data driven from the ATM
to MPHY layer to poll and select the
appropriate MPHY device. TXADR4 is the
MSB.
PXB 4219E, PXB 4220E, PXB 4221E
Active low signal asserted by the
Active low signal asserted by
contains valid cell
contains valid cell
Pin Descriptions
IWE8, V3.4
data.
data.
2003-01-20