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參數資料
| 型號： | SCC2681T |
| 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： | 8/15頁 |
| 文件大小： | 108K |
| 代理商： | SCC2681T |
Philips Semiconductors
Product data
SCC2681T
Dual asynchronous receiver/transmitter (DUART)
2004 Apr 06
8
AC ELECTRICAL CHARACTERISTICS
1, 2, 3, 4
SYMBOL
PARAMETER
LIMITS
UNIT
Min
Typ
Max
Reset timing (see Figure 3)
t
RES
Bus timing (see Figure 4) (Note 5)
Reset pulse width
1.0
–
–
μ
s
t
AVEL
t
ELAX
t
RLRH
t
EHEL
t
RLDA
t
RLDV
t
RHDI
t
RHDF
t
WLWH
t
DVWH
t
WHDI
Port timing (see Figure 5)
A0–A3 set-up to RDN and CEN, or WRN and CEN LOW
RDN and CEN, or WRN and CEN LOW to A0–A3 invalid
RDN and CEN LOW to RDN or CEN HIGH
CEN HIGH to CEN LOW
6, 7
CEN and RDN LOW to data outputs active
CEN and RDN LOW to data valid
CEN or RDN HIGH to data invalid
CEN or RDN HIGH to data outputs floating
WRN and CEN LOW to WRN or CEN HIGH
Data input valid to WRN or CEN HIGH
WRN or CEN HIGH to data invalid
0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
100
120
110
15
–
10
–
75
35
15
100
–
65
–
–
–
t
PS
t
PH
t
PD
Interrupt timing (see Figure 6)
INTRN (or OP3–OP7 when used as interrupts) negated from:
Read RHR (RxRDY/FFULL interrupt)
Write THR (TxRDY interrupt)
t
IR
Reset command (delta break interrupt)
Stop C/T command (counter interrupt)
Read IPCR (input port change interrupt)
Write IMR (clear of interrupt mask bit)
Clock timing (see Figure 7)
Port input set-up time before RDN LOW
Port input hold time after RDN HIGH
Port output valid after WRN HIGH
0
0
–
–
–
–
–
–
ns
ns
ns
200
–
–
–
–
–
–
–
–
–
–
–
–
200
200
200
200
200
200
ns
ns
ns
ns
ns
ns
t
CLK
f
CLK
t
CTC
f
CTC
t
RX
X1/CLK HIGH or LOW time
90
ns
X1/CLK frequency
2
4
MHz
CTCLK (IP2) HIGH or LOW time
CTCLK (IP2) frequency
8
55
ns
0
8
MHz
RxC HIGH or LOW time
55
ns
f
RX
RxC frequency
(16
×
)
8
(1
×
)
8
0
3.6864
8
MHz
0
1
MHz
t
TX
f
TX
TxC HIGH or LOW time
110
ns
TxC frequency
(16
×
)
8
(1
×
)
8
0
4
MHz
0
1
MHz
Transmit timing (see Figure 8)
t
TXD
t
TCS
Receive timing (see Figure )
TxD output delay from TxC external clock input on IP pin
–
–
300
ns
Output delay from TxC LOW at OP pin to TxD data output
0
–
100
ns
t
RXS
t
RXH
NOTES:
1. Parameters are valid over specified temperature range. See Ordering information table for applicable operating temperature range and V
CC
supply range.
2. All voltage measurements are referenced to ground (GND). For testing, all inputs except X1/CLK swing between 0.4 V and 2.4 V with a
transition time of 20 ns maximum. For X1/CLK this swing is between 0.4 V and 4.0 V. All time measurements are referenced at input
voltages of 0.8 V and 2.0 V and output voltages of 0.8 V and 2.0 V as appropriate.
3. Typical values are at +25
°
C, typical supply voltages, and typical processing parameters.
RxD data set-up time before RxC HIGH at external clock input on IP pin
200
–
–
ns
RxD data hold time after RxC HIGH at external clock input on IP pin
25
–
–
ns
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| SCC2681TC1A44 | 功能描述:UART 接口集成電路 RPLCMNT FOR SCN2681T RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SCC2681TC1A44,512 | 功能描述:UART 接口集成電路 RPLCMNT FOR SCN2681T RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SCC2681TC1A44,518 | 功能描述:UART 接口集成電路 RPLCMNT FOR SCN2681T RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SCC2681TC1A44,529 | 功能描述:UART 接口集成電路 RPLCMNT FOR SCN2681T RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SCC2681TC1A44-T | 功能描述:UART 接口集成電路 RPLCMNT FOR SCN2681T RoHS:否 制造商:Texas Instruments 通道數量:2 數據速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
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