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PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE
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comparison with the copy previously written into the internal RAM by the external
microprocessor. Alarms are raised to indicate reception of unstable and
mismatched messages. In the transmit direction, the TTB sources the trail trace
message from the internal RAM for insertion into the TR byte by the E3-TRAN.
The TTB also extracts the Payload Type label carried in the MA byte of the G.832
E3 stream. The label is used to ensure that the adaptation function at the trail
termination sink is compatible with the adaptation function at the trail termination
source. The Payload Type label is check for consistency between consecutive
multiframes. A Payload Type label received unchanged for five frames is
accepted for comparison with the copy previously written into the TTB by the
external microprocessor. Alarms are raised to indicate reception of unstable and
mismatched Payload Type label bits.
9.22 JTAG Test Access Port
The JTAG Test Access Port block provides JTAG support for boundary scan. The
standard JTAG EXTEST, SAMPLE, BYPASS, IDCODE and STCTEST
instructions are supported. The S/UNI-QJET identification code is 073460CD
hexadecimal.
9.23 Microprocessor Interface
The microprocessor interface block provides normal and test mode registers, and
the logic required to connect to the microprocessor interface. The normal mode
registers are required for normal operation, and test mode registers are used to
enhance the testability of the S/UNI-QJET. The register set is accessed as
follows:
Table 2
- Register Memory Map
Address
Register
000H
100H
200H
300H
S/UNI-QJET Configuration 1
001H
101H
201H
301H
S/UNI-QJET Configuration 2
002H
102H
202H
302H
S/UNI-QJET Transmit Configuration
003H
103H
203H
303H
S/UNI-QJET Receive Configuration
004H
104H
204H
304H
S/UNI-QJET Data Link and FERF/RAI
Control
005H
105H
205H
305H
S/UNI-QJET Interrupt Status