參數(shù)資料
型號: SCC68692
廠商: NXP Semiconductors N.V.
英文描述: Dual asynchronous receiver/transmitter DUART
中文描述: 雙異步接收器/發(fā)送器杜阿爾特
文件頁數(shù): 23/30頁
文件大?。?/td> 193K
代理商: SCC68692
Philips Semiconductors
Product specification
SCC68692
Dual asynchronous receiver/transmitter (DUART)
1998 Sep 04
23
X1/CLK
CTCLK
RxC
TxC
t
CLK
t
CTC
t
Rx
t
Tx
t
CLK
t
CTC
t
Rx
t
Tx
+5V
1K
X1
X2
C1 = C2 = 24pF FOR C
L
= 20PF
X1
X2
3.6864MHz
3pF
4pF
50 TO
150 K
TO INTERNAL CLOCK DRIVERS
SCC2698B
NOTE:
C1 AND C2 SHOULD BE BASED ON MANUFACTURER’S SPECIFICATION. PARASITIC CAPACITANCE SHOULD
BE INCLUDED WITH C1 AND C2. R1 IS ONLY REQUIRED IF U1 WILL NOT DRIVE TO X1 INPUT LEVELS
TYPICAL CRYSTAL SPECIFICATION
2 – 4MHZ
12 – 32pF
PARALLEL RESONANT, FUNDAMENTAL MODE
FREQUENCY:
LOAD CAPACITANCE (C
L
):
TYPE OF OPERATION:
NC
R1
U1
SD00137
RESISTOR REQUIRED
WHEN U1 IS A TTL DEVICE
Figure 9. Clock Timing
t
TXD
t
TCS
1 BIT TIME
(1 OR 16 CLOCKS)
TxD
TxC
(INPUT)
TxC
(1X OUTPUT)
SD00146
Figure 10. Transit Timing
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