參數(shù)資料
型號: AM79C850KC
廠商: ADVANCED MICRO DEVICES INC
元件分類: 微控制器/微處理器
英文描述: SUPERNET-R 3
中文描述: 1 CHANNEL(S), 100M bps, FDDI CONTROLLER, PQFP208
封裝: PLASTIC, QFP-208
文件頁數(shù): 48/97頁
文件大?。?/td> 358K
代理商: AM79C850KC
AMD
P R E L I M I N A R Y
48
SUPERNET 3
RPX2
SWPX2
WPR2
RPXA1
SWPXA1
WPXA1
RPXA0
SWPXA0
WPXA0
RPXS
SWPXS
WPXS
RPR1
SWPR1
WPR1
SACL
SABC
EACB
EARV1
EAS
EAA0
EAA1
EARV2
SPECIAL FRAME AREA
RECEIVE QUEUE 1
SYNCHRONOUS QUEUE
(TRANSMIT)
ASYNCHRONOUS QUEUE 0
(TRANSMIT)
ASYNCHRONOUS QUEUE 1
(TRANSMIT)
RECEIVE QUEUE 2
19574A-18
Figure 17. Buffer Memory Queue Organization
Parity Generation and Checking
The SUPERNET 3 will have the following sequence of
parity generation and checking:
Transmit Path:
The parity, (even or odd) will be checked at the buffer
memory interface (BDP pins). Even parity will be
regenerated at the MAC—external PHY interface.
Receive Path:
Parity (even or odd) will be generated at the buffer
memory interface. Even parity will be checked at the
external PHY (R Bus) interface, if ENA_PAR_CHK
(bit 10) in PLC_CNTRL_A register is set.
Node Processor Synchronous Mode
Operation
The NPMODE pin (external pin) must be strapped
high to select SUPERNET 3 synchronous operation
and
strapped
low
to
asynchronous operation.
select
SUPERNET
3
There are two possible methods of synchronous
operation of the SUPERNET 3:
1. BMCLK frequency equals BCLK frequency. (i.e.
12.5 MHz), and both clocks must be in phase.
2. BMCLK operates at twice BCLK (i.e. BMCLK =
25 MHz), and both clocks must be in phase.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C850KCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:SUPERNET-R 3
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