TXC-03305AIPQ Transwitch Corporation, TXC-03305AIPQ Datasheet - Page 21

• Manufacturer Part Number: TXC-03305AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-03305AIPQ

• Lead Free Status / RoHS Status: Not Compliant

CONTROL LEADS
EXTERNAL CLOCK
Symbol
OUTDIS
HRESET
Symbol
XCK
DLEN
M13X
Lead No.
Lead No.
BGA
P12
BGA
B13
C3
B3
B2
Lead No.
PQFP
Lead No.
PQFP
90
164
204
207
3
I/O/P
I/O/P
I
I
I
I
I
CMOS External Transmit Clock: An external clock having a fre-
Type
TTLp Outputs Disable: A low causes all M13X outputs and bidi-
TTLp Data Link Enable: Normally left open. A high enables the
TTLp Asynchronous Device RESET: This active low lead should
TTLp Enable M13X Functions: When this input lead is high, the
Type
quency of 44.736 MHz and a stability of 20 ppm is required
to meet DSX-3 cross-connect requirements. The clock duty
cycle should be kept to (50 5)%. The transmit clock is also
used to operate the M13X microprocessor interface. The
M13X monitors this clock for transitions. When a clock failure
is detected, the M13X automatically switches to the receive
clock (DS3CR) for multiplexer and microprocessor operation.
Receive loop timing (a 1 written to bit 3, LPTIME, in 02H)
also causes the receive clock to become the transmit clock.
rectional signal leads to be set to a high impedance state for
test purposes except the TDO, CDCCR and CDCCT leads.
The CDCCR and CDCCT leads can be tri-stated by apply-
ing a low to the DLEN lead. This lead is provided with an
internal pull-up resistor.
transmit and receive data link indication signals, CDCCT
and CDCCR. The data link indication signals identify the
location of the three data link C-bits (C13, C14, and C15).
This lead is provided with an internal pull-up resistor.
be toggled low for a minimum of 25 ns and then high after
the power to the M13X has stabilized, to perform a global
reset of the M13X device. When a global reset occurs, the
memory map is initialized to all 0s except for the XT and
T2X1-T2X7 bits which are set to 1s, and internal circuitry is
reset. This lead is provided with an internal pull-up resistor.
M13X device has the same functionality as the M13E
device. Also, the TXFRM lead and ID bit can be used as
well. All M13X functions in registers 25H-3FH are disabled
and all counters are 8 bits long. When this lead is low, the
M13X functions in registers 25H-3FH are enabled (i.e., all
features of the device can be used), and all counters
become 16 bits long. This lead is provided with an internal
pull-up resistor. When the M13X lead is low, the NEW bit in
register 1DH does not become set to one again after it is
cleared when a continuous constant FEAC message is
received.
DATA SHEET
- 21 -
Name/Function
Name/Function
Ed. 4, September 2000
TXC-03305
TXC-03305-MB
M13X