参数资料
| 型号： | SCC2681AC1A44,512 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 3/29页 |
| 文件大小： | 0K |
| 描述： | IC UART 44-PLCC |
| 标准包装： | 26 |
| 特点： | 故障启动位检测 |
| 通道数： | 2，DUART |
| FIFO's： | 3 位 |
| 电源电压： | 5V |
| 带并行端口： | 是 |
| 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： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC |
| 包装： | 管件 |
| 其它名称： | 568-5786 935274521512 SCC2681AC1A44 SCC2681AC1A44,512-ND SCC2681AC1A44-ND |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第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
SCC2681
Dual asynchronous receiver/transmitter (DUART)
2004 Apr 06
11
PROGRAMMING
The operation of the DUART is programmed by writing control words
into the appropriate registers. Operational feedback is provided via
status registers which can be read by the CPU. The addressing of
the registers is described in Table 1.
The contents of certain control registers are initialized to zero on
RESET. Care should be exercised if the contents of a register are
changed during operation, since certain changes may cause
operational problems.
For example, changing the number of bits per character while the
transmitter is active may cause the transmission of an incorrect
character. In general, the contents of the MR, the CSR, and the
OPCR should only be changed while the receiver(s) and
transmitter(s) are not enabled, and certain changes to the ACR
should only be made while the C/T is stopped.
Mode registers 1 and 2 of each channel are accessed via
independent auxiliary pointers. The pointer is set to MR1x by
RESET or by issuing a ‘reset pointer’ command via the
corresponding command register. Any read or write of the mode
register while the pointer is at MR1x, switches the pointer to MR2x.
The pointer then remains at MR2x, so that subsequent accesses are
always to MR2x unless the pointer is reset to MR1x as described
above.
Mode, command, clock select, and status registers are duplicated
for each channel to provide total independent operation and control.
Refer to Table 2 for register bit descriptions.
Table 1.
SCC2681 Register Addressing
A3
A2
A1
A0
READ (RDN = 0)
WRITE (WRN = 0)
0
Mode Register A (MR1A, MR2A)
0
1
Status Register A (SRA)
Clock Select Register A (CSRA)
0
1
0
BRG Extend *
Command Register A (CRA)
0
1
Rx Holding Register A (RHRA)
Tx Holding Register A (THRA)
0
1
0
Input Port Change Register (IPCR)
Aux. Control Register (ACR)
0
1
0
1
Interrupt Status Register (ISR)
Interrupt Mask Register (IMR)
0
1
0
Counter/Timer Upper Value (CTU)
C/T Upper Preset Value (CRUR)
0
1
Counter/Timer Lower Value (CTL)
C/T Lower Preset Value (CTLR)
1
0
Mode Register B (MR1B, MR2B)
1
0
1
Status Register B (SRB)
Clock Select Register B (CSRB)
1
0
1
0
1
×/16× Test
Command Register B (CRB)
1
0
1
Rx Holding Register B (RHRB)
Tx Holding Register B (THRB)
1
0
Use for scratch pad
1
0
1
Input Ports IP0 to IP6
Output Port Conf. Register (OPCR)
1
0
Start Counter Command
Set Output Port Bits Command
1
Stop Counter Command
Reset Output Port Bits Command
* See Table 5 for BRG Extended frequencies in this data sheet, and
“Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692,
SCC68692 and SCC2698B” in application notes elsewhere in this publication.
相关PDF资料 |
PDF描述 |
|---|---|
| SCC2681AC1A44,518 | IC DUART 44-PLCC |
| SC16C652BIB48,151 | IC UART DUAL W/FIFO 48-LQFP |
| SC16C652BIB48,128 | IC ENCODER/DECODER IRDA 48LQFP |
| SCC2691AC1N24,602 | IC UART SINGLE 24-DIP |
| SCC2691AE1N24,129 | IC UART 24-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SCC2681AC1A44-S | 功能描述:UART 接口集成电路 RPLACMNT FOR SCN2681 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 |
| SCC2681AC1A44-T | 功能描述:UART 接口集成电路 RPLACMNT FOR SCN2681 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 |
| SCC2681AC1N28 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Dual asynchronous receiver/transmitter (DUART) |
| SCC2681AC1N28,112 | 功能描述:UART 接口集成电路 RPLACMNT FOR SCN2681 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 |
| SCC2681AC1N40 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Dual asynchronous receiver/transmitter (DUART) |
发布紧急采购，3分钟左右您将得到回复。