參數(shù)資料
型號: PSB21911
廠商: SIEMENS A G
元件分類: 數(shù)字傳輸電路
英文描述: ISDN Echocancellation Circuit for Terminal Applications IEC-Q TE
中文描述: DATACOM, ISDN ECHO CANCELLER
文件頁數(shù): 19/164頁
文件大?。?/td> 1401K
代理商: PSB21911
PSB 21911
PSF 21911
Pin Definitions and Functions
Semiconductor Group
19
11.97
ALE
I
Address Latch Enable
(Demultiplexed mode): ALE tied to
GND selects the Siemens/Intel type.
ALE tied to VDD selects the Motorola
type.
Controller Data Clock
(Serial mode): Shifts data from (1) and
to (0) the device.
Clock Signal
A 7.68MHz clock, synchronous to the
U-interface, is provided on this pin.
Processor Interface Enable
Setting PMODE to “1“ enables the
Processor Interface
.
Tie to GND or do
not connect to select stand-alone
mode. Internal pull down.
Monitor Procedure Time-Out
Disables the internal 6 ms Monitor
time-out when set to (1). Internal pull-
down resistor.
Read
(Siemens/Intel multiplexed and
demultiplexed modes): indicates a
read operation, active low.
Data Strobe
(Motorola demultiplexed mode):
indicates a data transfer, active low.
(Serial mode) tie to GND.
Leave open for future compatibility.
CCLK
I
32
54
CLS
CLS
O
12
24
PMOD
E
PMODE I
(PD)
34
57
MTO
I
(PD)
RD
I
DS
I
not used I
not used
6, 9, 11,
15, 20, 25,
27, 31, 33,
34, 40, 48,
49, 50, 51,
63, 64
not
used
Pin No.
P-LCC-44 T-QFP64
Symbol
Stand-
alone
I/O
Function
μP
mode
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