參數(shù)資料
型號(hào)： COM20019ILJP
廠商： STANDARD MICROSYSTEMS CORP
元件分類： 微控制器/微處理器
中文描述： 1 CHANNEL(S), 312.5K bps, LOCAL AREA NETWORK CONTROLLER, PQCC28
封裝： PLASTIC, LCC-28
文件頁數(shù)： 44/65頁
文件大小： 386K
代理商： COM20019ILJP
Cost Competitive ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
SMSC COM20019I
Page 49
Rev. 09-25-07
DATASHEET
Figure 8.2 - MULTIPLEXED BUS, 80XX-LIKE CONTROL SIGNALS; READ CYCLE
AD0-AD2,
VALID
nCS
t1
t3
t8
ALE
VALID DATA
t2,
t6
t5
t4
t7
D3-D7
nRD
t9
t10
nWR
t13
t11
t12
Note 3
Note 2
MUST BE: RBUSTMG bit = 0
Parameter
min
max
units
t1
t2
t3
t4
t5
t6
t7
Address Setup to ALE Low
Address Hold from ALE Low
nCS Setup to ALE Low
nCS Hold from ALE Low
ALE Low to nRD Low
nRD Low to Valid Data
nRD High to Data High Impedance
Cycle Time (nRD Low to Next Time Low)
20
10
15
0
4TARB
*
40
20
nS
20
60
20
ALE High Width
ALE Low Width
nRD Low Width
nRD High Width
nWR
to nRD Low
t8
t9
t10
t11
t12
t13
nS
The Microcontroller typically accesses the COM20019 on every other cycle.
Therefore, the cycle time specified in the microcontroller's datasheet
should be doubled when considering back-to-back COM20019 cycles.
Note 1:
TARB is the Arbitration Clock Period
TARB is identical to Topr if SLOW ARB = 0
*
TARB is twice Topr if SLOW ARB = 1
Topr is the period of operation clock. Same as the XTAL1 period.
Note 2:
Read cycle for Address Pointer Low/High Registers occurring after a read from
Data Register requires a minimum of 5TARB from the trailing edge of nRD to the
leading edge of the next nRD.
Note 3:
Read cycle for Address Pointer Low/High Registers occurring after a write to
Data Register requires a minimum of 5TARB from the trailing edge of nWR to the
leading edge of nRD.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
COM20019I-LJP 制造商:SMSC 制造商全稱:SMSC 功能描述:Low Cost ARCNET(ANSI 878.1) Controller with 2k X 8 On-Board RAM
COM20019ILJP3V 功能描述:網(wǎng)絡(luò)控制器與處理器 IC ARCNET Contrllr RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
COM20019ILJPTR 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Arcnet (ANSI 878.1) Controllr 2k x 8 Ram RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
COM20019IP 制造商:Rochester Electronics LLC 功能描述:- Bulk
COM20020 制造商:SMSC 制造商全稱:SMSC 功能描述:COM20020 3.3V ULANC Universal Local Area Network Controller with 2K x 8 On-Board RAM
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