PEB20320H-V34 Infineon Technologies, PEB20320H-V34 Datasheet - Page 186
PEB20320H-V34
Manufacturer Part Number
PEB20320H-V34
Description
IC CONTROLR 32-CH HDLC 160-MQFP
Manufacturer
Infineon Technologies
Datasheet
1.PEB20320H-V34.pdf
(252 pages)
Specifications of PEB20320H-V34
Function
Multichannel Network Interface Controller (MUNICH)
Interface
HDLC, V.110, X.30
Voltage - Supply
5V
Current - Supply
100mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
160-BSQFP
Includes
Automatic Flag Detection, CRC Generation and Checking, Error Detection, Interframe-Time-Fill Change Detection
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power (watts)
-
Number Of Circuits
-
Other names
PEB20320H-V34
PEB20320H-V34IN
PEB20320H-V34IN
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PEB20320H-V34
Manufacturer:
Infineon Technologies
Quantity:
10 000
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User’s Manual
Bus Arbitration
Since three devices are using the bus it is necessary to implement a bus arbitration.
Each bus master requests bus mastership and awaits bus control given to it by the
arbiter. The bus arbitration protocol is also Motorola specific. The intel specific signals of
the LAN controller (i82596) are translated into Motorola specific signals. The bus
arbitration is realized in two devices GAL16V8 (15 ns), both containing a Finite State
Machine. Arbiter 1 gives bus mastership to the CPU whenever no other bus master
requests bus mastership. If either the MUNICH32 or the LAN controller requests bus
mastership the arbiter 2 gives a bus request to the arbiter 1. Arbiter 1 forces the CPU to
release the bus and gives bus mastership to arbiter 2. Arbiter 2 then responds to
MUNICH32 or LAN controller. In this solution the priority of the MUNICH32 is higher than
that of the LAN controller. Consequently if both alternate bus masters request bus
mastership at the same time, bus mastership will be given to the MUNICH32. The LAN
controller has to wait until MUNICH32 has finished his accesses and arbiter 1 returns the
bus to the CPU. It might happen, that some Ethernet frames get lost, because the
LAN controller can not get access to the bus in time, but the loss of incoming data from
the ISDN (where fees have to be paid) is minimized.
Figure 89
Bus Arbitration
MUNICH32
Arbiter 1
Arbiter 2
CPU
186
Application Notes
i82596
ITS08287
PEB 20320
01.2000
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