参数资料
型号: YTD423D-S
元件分类: 数字传输电路
英文描述: DATACOM, ISDN CONTROLLER, PQFP100
封装: SQFP-100
文件页数: 6/13页
文件大小: 219K
代理商: YTD423D-S
Supp
orts
ETSI
ETS
300
012
[April
1992]
and
ANSI
T1.605
op
erating
mo
des
Leased
line
capabilit
y
(JT-I430-a)
Bc
hannel
I/O
clo
c
k
selection
function
{
In
ternal
clo
c
kmo
de:
Inputs/outputs
the
B-c
hannel
data
with
64
k,
56
k
or
32
kHz
in
ternal
clo
c
k
{
External
clo
c
k
mo
de
(PCM
High
w
a
y
mo
de):
Inputs/outputs
the
B
c
hannel
data
with
a
128
kHz
to
2048
kHz
external
clo
c
k
Bc
hannel
selection
function
{
In
ternal
clo
c
kmo
de:
Selects/switc
hes
B
c
hannel
I/O
pins
{
External
clo
c
k
mo
de
(PCM
High
w
a
y
mo
de):
Selects/switc
hes
B
c
hannel
time
slots
Multiframing
capabilit
y
Abundan
tT
est
functions
(for
testing
and
main
tenance)
{
Three
kinds
of
lo
op-bac
k
mo
des
(Lo
op-bac
k1to
3)
{
INF
O
signals
output
for
testing
{
T
est
pulse
output
for
pulse
shap
e
ev
aluation
INF
O1
transmission
and
INF
O4
reception
monitor
pins
SLEEP
monitor
pin
I.430
transmission
frame
phase
adjustmen
t
function
2.
La
y
er
2
function
Conforms
to
ITU-T
Recommendation
Q.920
and
Q.921
[1992
edition]
and
TTC
Standard
JT-Q920
and
JT-Q921
[1993
edition]
(default)
{
HDLC
frame
con
trol
(Flag
con
trol,
F
CS
generation/c
hec
king,
automatic
zero
insertion/deletion,
ab
ort
pattern
transmission/detection,
etc.)
{
LAP-D
status
con
trol
(sequence
con
trol,
o
w
con
trol,
SAPI
con
trol)
{
Built-in
timer
for
time-out
c
hec
k
Supp
orts
ETSI
ETS
300
125
[Septem
b
er
1991],
National
ISDN-1/2,
A
T&T
5ESS
5E9
and
Nortel
DMS-
100
S208-6
op
erating
mo
des
Multi-link
capabilit
y
(circuit
switc
hing,
pac
k
et
switc
hing)
Automatic
assigned
TEI/non-automatic
assigned
TEI
(V
C/PV
C)
Leased
line
mo
de
(disable
la
y
er
2
function)
3.
La
y
er3in
terface
function
Connects
to
8-bit
or
16-bit
micropro
cessor
(8086
family
,
Z80
family
,
6800
family
and
68000
family)
Op
erates
in
one
of
t
w
o
data
transfer
mo
des
{
DMA
transfer
mo
de
(with
the
built-in
24-bit
address
DMA
con
troller)
{
I/O
transfer
mo
de
(with
the
built-in
FIF
O)
Primitiv
e
logical
in
terface
2
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