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(yè)數(shù): 55/65頁(yè)
文件大?。?/td> 386K
代理商: COM20019ILJP
Cost Competitive ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
SMSC COM20019I
Page 59
Rev. 09-25-07
DATASHEET
t1
t3
Parameter
Input Clock High Time
Input Clock Period
min
20
50
max
units
nS
XTAL1
t1
t4
Input Clock Frequency*
100
t2
Input Clock Low Time
nS
t3
20
typ
10
t2
20
MHz
t5
Frequency Accuracy*
-200
200
ppm
Note*: t4 and t5 are applied to crystal oscillaton.
4.0V
1.0V
50% of VDD
Figure 8.12 - TTL INPUT TIMING ON XTAL1 PIN
t1
Parameter
nRESET Pulse Width***
min
max
units
nRESET
t1
t2
nINTR High to Next nINTR Low
typ
t2
nINTR
5TXTL*
EF = 0
EF = 1
TDR**/2
4TXTL*
Note*: TXTL is period of external XTAL oscillation frequency.
Note**: TDR is period of Data Rate (i.e. at 312.5 Kbps, TDR = 3200 nS)
Note***: When the power is turned on, t1 is measured from stable XTAL
oscillation after VDD was over 4.5V.
Figure 8.13 - RESET AND INTERRUPT TIMING
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