PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 42
PEF2091
Manufacturer Part Number
PEF2091
Description
ICs for Communications(ISDN Echocancellation Circuit)
Manufacturer
Siemens Semiconductor Group
Datasheet
1.PEF2091.pdf
(298 pages)
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Semiconductor Group
Pin No.
P-LCC-44
39
38
25
2.2.2.3
19
3
17
µP Control Pins
Pin No.
T-QFP64
M-QFP64
62
61
44
36
10
32
Symbol
not used I/O
D5
AD5
not used I/O
D6
AD6
not used I/O
D7
AD7
INT
CS
not used I
WR
R/W
Input (I)
Output (O)
I/O
I
42
Function
(Serial mode) tie to GND.
Data bus pin (demultiplexed modes)
Address/Data bus pin (Multiplexed
mode)
(Serial mode) tie to GND.
Data bus pin (demultiplexed modes)
Address/Data bus pin (Multiplexed
mode)
(Serial mode) tie to GND.
Data bus pin (demultiplexed modes)
Address/Data bus pin (Multiplexed
mode)
Interrupt line (Multiplexed,
demultiplexed and serial modes): Low
active.
Chip select (Multiplexed,
demultiplexed and serial modes): Low
active.
(Serial mode) tie to GND.
Write (Siemens/Intel multiplexed and
demultiplexed modes): indicates a
write operation, active low.
Read/Write (Motorola demultiplexed
mode): indicates a read (high) or write
(low) operation.
Pin Descriptions
Data Sheet 01.99
PEB 2091
PEF 2091
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