PEB20256E-V21 Infineon Technologies, PEB20256E-V21 Datasheet - Page 75

• Manufacturer Part Number: PEB20256E-V21
• Description: IC CONTROLLER INTERFACE 388-BGA
• Manufacturer: Infineon Technologies

Specifications of PEB20256E-V21

• Function: Multichannel Network Interface Controller (MUNICH)
• Interface: HDLC, PPP, Serial, TMA
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 200mA
• Power (watts): 3W
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 388-BBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Circuits: -
• Other names: PEB20256E-V21; PEB20256E-V21IN

channels limit access to system memory for a particular channel. A programmable
transmit buffer size and two programmable threshold are configurable by the host CPU
for each channel.
Note: The sum of both thresholds must be smaller than the transmit buffer size of a
•
Figure 4-9
The threshold values have the following effect:
• Data belonging to one channel stored in the internal transmit buffer will only be
Data Sheet
transferred to the protocol machine when the transmit forward threshold is reached or
if a complete frame is stored inside the transmit buffer. This mechanism avoids data
underrun conditions.
particular channel.
programmable number of
b u f f e r l o c a t i o n s p e r
channel
Transmit Buffer Thresholds
data management unit
transmit forward threshold
transmit refill threshold
protocol machine
transmit buffer
frame
75
request new data as long
a s n u m b e r o f e m p t y
l o c a t i o n s i s a b o v e
transmit refill threshold
w a i t w i t h d a t a t r a n s -
mission until buffer level
reaches transmit forward
threshold
Functional Description
PEB 20256 E
PEF 20256 E
04.2001