peb20525 Infineon Technologies Corporation, peb20525 Datasheet - Page 31
peb20525
Manufacturer Part Number
peb20525
Description
2 Channel Serial Optimized Communication Controller For Hdlc/ppp
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB20525.pdf
(252 pages)
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Table 1
Pin No.
P-
LFBGA-
80-2
G8
-
G7
H1
Data Sheet
P-TQFP-
100-3
53
33
55
20
Microprocessor Bus Interface
Symbol In (I)
WR
WIDTH
CLK
INT/INT O
Out (O)
I
I
I
o/d
Function
Write Strobe (Intel bus mode only)
This signal indicates a write operation. The
current bus master presents valid data on lines
D(7:0) / D(15:0) during an active WR signal.
In Motorola bus mode, a pull-up resistor to V
recommended on this pin.
Width Of Bus Interface
A low signal on this input selects the 8-bit bus
interface mode.
A high signal on this input selects the 16-bit bus
interface mode. In this case word transfer to/from
the internal registers is enabled. Byte transfers
are implemented by using BLE and BHE (Intel bus
mode) or LDS and UDS (Motorola bus mode)
In P-LFBGA-80-2 package this signal is not
available, since only 8 bit bus width is supported.
Clock
The system clock for SEROCCO-H is provided
through this pin.
Interrupt Request
The INT/INT goes active when one or more of the
bits in registers
to these registers clears the interrupt. The INT/
INT line is inactive when all interrupt status bits
are reset.
Interrupt sources can be unmasked in registers
IMR0..IMR2
’0’.
31
by setting the corresponding bits to
ISR0..ISR2
are set to ’1’. A read
Pin Descriptions
PEB 20525
PEF 20525
2000-09-14
DD3
is
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