- 您现在的位置：买卖IC网 > PDF目录11820 > SCC68681E1N40,112 (NXP Semiconductors)IC DUART 40DIP PDF资料下载
参数资料
| 型号： | SCC68681E1N40,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 11/29页 |
| 文件大小： | 0K |
| 描述： | IC DUART 40DIP |
| 标准包装： | 9 |
| 特点： | 故障启动位检测 |
| 通道数： | 2，DUART |
| FIFO's： | 3 位 |
| 电源电压： | 5V |
| 带自动流量控制功能： | 是 |
| 带故障启动位检测功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 通孔 |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 40-DIP |
| 包装： | 管件 |
| 其它名称： | 935274495112 SCC68681E1N40 SCC68681E1N40-ND |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
Philips Semiconductors
Product data
SCC68681
Dual asynchronous receiver/transmitter (DUART)
2004 Apr 06
19
Transmitter Disable Note
The sequence of instructions enable transmitter — load transmit
holding register — disable transmitter will result in nothing being
sent if the time between the end of loading the transmit holding
register and the disable command is less that 3/16 bit time in the
16
× mode or one bit time in the 1× mode. Also, if the transmitter,
while in the enabled state and underrun condition, is immediately
disabled after a single character is loaded to the transmit holding
register, that character will not be sent.
In general, when it is desired to disable the transmitter before the
last character is sent AND the TxEMT bit is set in the status register
(TxEMT is always set if the transmitter has underrun or has just
been enabled), be sure the TxRDY bit is active immediately before
issuing the transmitter disable instruction. TxRDY sets at the end of
the ‘start bit’ time. It is during the start bit that the data in the transmit
holding register is transferred to the transmit shift register.
Non-standard baud rates are available as shown in Table 6 below,
via the BRG Test function.
Table 6.
Baud Rates Extended
Normal BRG
BRG Test
CSR[7:4]
ACR[7] = 0
ACR[7] = 1
ACR[7] = 0
ACR[7] = 1
0000
50
75
4,800
7,200
0001
110
880
0010
134.5
1,076
0011
200
150
19.2 k
14.4 k
0100
300
28.8 k
0101
600
57.6 k
0110
1,200
115.2 k
0111
1,050
2,000
1,050
2,000
1000
2,400
57.6 k
1001
4,800
1010
7,200
1,800
57.6 k
14.4 k
1011
9,600
1100
38.4 k
19.2 k
38.4 k
19.2 k
1101
Timer
1110
I/O2 – 16
×
I/O2 – 16
×
I/O2 – 16
×
I/O2 – 16
×
1111
I/O2 – 1
×
I/O2 – 1
×
I/O2 – 1
×
I/O2 – 1
×
NOTE:
Each read on address H‘2’ will toggle the baud rate test mode. When in the BRG test mode, the baud rates change as shown to the left. This
change affects all receivers and transmitters on the DUART. See
“Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692,
SCC68681 and SCC2698B” in application notes elsewhere in this publication.
The test mode at address H‘A’ changes all transmitters and receivers to the 1
× mode and connects the output ports to some internal nodes.
Receiver Reset in the Normal Mode (Receiver Enabled)
Reset can be accomplished easily by issuing a receiver software or hardware reset followed by a receiver enable. All receiver data,
status and programming will be preserved and available before reset. The reset will NOT affect the programming.
Receiver Reset in the Wake-Up Mode (MR1[4:3] = 11)
Reset can also be accomplished easily by first exiting the wake-up mode (MR1[4:3] = 00 or 01 or 10), then issuing a receiver software or
hardware reset followed by a wake-up re-entry (MR1[4:3] = 11). All receiver data, status and programming will be preserved and
available before reset. The reset will NOT affect other programming.
The reason for this is the receiver is partially enabled when the parity bits are at ‘11’. Thus the receiver disable and reset is bypassed by
the partial enabling of the receiver.
SD00097
相关PDF资料 |
PDF描述 |
|---|---|
| MS3114E12-10S | CONN RCPT 10POS JAM NUT W/SCKT |
| SCC2681AE1N40,112 | IC DUART 40-DIP |
| D38999/24WC8PA | CONN RCPT 8POS JAM NUT W/PINS |
| FT4232HL-TRAY | IC USB HS QUAD UART/SYNC 64-LQFP |
| MS27484T12B98PA | CONN PLUG 10POS STRAIGHT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SCC68692 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Dual asynchronous receiver/transmitter DUART |
| SCC68692C1A44 | 功能描述:UART 接口集成电路 2CH. 5V IND. UART MOT INTERF. RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SCC68692C1A44,512 | 功能描述:UART 接口集成电路 2CH. 5V IND. UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SCC68692C1A44,518 | 功能描述:UART 接口集成电路 5V IND. UART 2 CH. MOT INTERF. RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SCC68692C1A44,529 | 功能描述:UART 接口集成电路 5V IND. UART 2 CH. RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。