
22
x r
PRELIMINARY
E3 UNI FOR ATM
XRT7234
REV. P1.0.0
28
39
A7
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
40
NC
****
Not Bonded Out
29
41
A6
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
30
42
A5
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
31
43
A4
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
32
44
A3
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
33
45
A2
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
34
46
A1
I
Address Bus Input (Microprocessor Interface):
(Please see description
for A8)
47
RxGFCMSB
O
Received GFC Nibble Field—MSB Indicator:
This output pin functions
as a part of the “Receive GFC-Nibble Field” Serial Output port; which
also consists of the RxGFC and RxGFCClk pins. This pin pulses “high”
the instant that the MSB (Most Significant Bit) of a GFC Nibble is being
output on the RxGFC pin.
Notes:
1. The “Receive GFC Nibble Field” serial output port is only available for
the 160 pin packaged devices.
2. The “Receive GFC Nibble-field” serial output port will only output the
GFC Nibble-field values for valid cells. Therefore, this output pin will only
pulse “high” while the Receive Cell Processor is processing a valid cell.
35
48
A0
I
Address Bus Input (Microprocessor Interface)—LSB (Least Significant Bit):
(Please see description for A8)
49
RxGFClk
O
Received GFC Nibble Serial Output Port Clock Signal:
This output
pin functions as a part of the “Receive GFC Nibble-Field” Serial Output
Port; also consisting of the RxGFC and RxGFCMSB pins. This pin pro-
vides a clock pulse which allows external circuitry to latch in the GFC Nib-
ble-Data via the RxGFC output pin.
36
50
RxClk
I
Receive Utopia Interface Clock Input:
The byte (or word) data, on the
Receive Utopia Data bus is updated on the rising edge of this signal. The
Receive Utopia Interface block can be clocked at 25 MHz, 33 MHz, or 50
MHz.
51
RxCellRxed
O
Receive Cell Processor—Cell Received Indicator:
This output pin
pulses “high” each time the Receive Cell Processor receives a new cell
from the Receive E3 Framer.
PIN DESCRIPTION (CONTINUED)
Pin
No.
100 Pin Package
Pin No. 160
PinPackage
Symbol
Type
Description