TXC-03303-ARPQ Transwitch Corporation, TXC-03303-ARPQ Datasheet - Page 12

• Manufacturer Part Number: TXC-03303-ARPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-03303-ARPQ

• Lead Free Status / RoHS Status: Compliant

DS3 INTERFACE
MICROPROCESSOR INTERFACE
A/D (7-0)
Symbol
Symbol
DS3CR
DS3DR
RD/WR
DS3CT
DS3DT
D(7-0)
A(7-4)
A(3-0)
SEL
RD
Pin No.
Pin No.
60-57
48-45
76-83
125
68
69
93
74
71
I/O/P
I/O/P
I/O
O
O
I
I
I
I
I
TTL8mA
TTL8mA
TTL8mA
CMOS
CMOS
TTLp
Type
Type
TTL
TTL
- 12 -
DS3 Receive Clock: A 44.736 MHz clock that is used to
clock DS3 data into the M13E. This clock is used as the
time base for demultiplexing the DS3 data. When the
loop timing feature is active (a one written into bit 3
(LPTIME) in 02H), or when the DS3 external transmit
clock (XCK) fails, this clock becomes the transmit clock.
DS3 Receive Data: Receive 44.736 Mbit/s data is
clocked into the M13E on positive transitions of the
receive clock (DS3CR).
DS3 Transmit Clock: A 44.736 MHz clock which is
derived from the external transmit clock input signal
(XCK). It is used to clock DS3 data from the M13E.
DS3 Transmit Data: Transmit C-bit parity or M13 format-
ted DS3 data is clocked out of the M13E on positive tran-
sitions of the transmit clock (DS3CT).
Address Bus (Intel/Motorola): These are active high
address line inputs that are used by the microprocessor
for accessing the M13E registers for a read/write cycle.
A7 is the most significant bit. These leads are disabled
when the multiplexed interface is selected.
Address/Data Bus (Multiplexed), Data Bus (Intel/
Motorola): For a multiplexed interface, these bidirec-
tional leads constitute address/data buses for accessing
the M13E registers. For either the Intel or Motorola inter-
face, these bidirectional leads are used for transferring
data. The most significant bit is A/D7 or D7.
Select: A low enables data transfers between the micro-
processor and the M13E registers during a read/write
bus cycle.
Read (Intel/Multiplexed) or Read/Write (Motorola):
Intel/Multiplexed - An active low signal generated by the
microprocessor for reading the M13E register locations.
Motorola - An active high signal generated by the micro-
processor for reading the M13E register locations. An
active low signal is used to write to the M13E register
locations.
Name/Function
Name/Function
Ed. 4, August 1998
TXC-03303
TXC-03303-MB
M13E