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SC28L91A1B数据手册恩XP中文资料规格书
SC28L91A1B规格书详情
描述 Description
The SC28L91 is a new member of the IMPACT family of Serial Communications Controllers. It is a single channel UART operating at 3.3 V and 5.0 V VCC, 8 or 16 byte FIFOs and is quite compatible with software of the SC28L92 and previous UARTs offered by Philips. It is a new part that is similar to our previous one channel part but is vastly improved. The improvements being: 16 character receiver, 16 character transmit FIFOs, watch dog timer for the receiver, mode register 0 is added, extended baud rate, over all faster bus and data speeds, programmable receiver and transmitter interrupts and versatile I/O structure. (The previous one channel part, SCC2691, is NOT being discontinued.)
Pin programming will allow the device to operate with either the Motorola or Intel bus interface. Bit 3 of the MR0 register allows the device to operate in an 8-byte FIFO mode if strict compliance with an 8-byte FIFO structure is required.
The Philips Semiconductors SC28L91 Universal Asynchronous Receiver/Transmitter (UART) is a single-chip CMOS-LSI communications device that provides a full-duplex asynchronous receiver/transmitter channel in a single package. It interfaces directly with microprocessors and may be used in a polled or interrupt driven system with modem and DMA interface.
The operating mode and data format of the channel can be programmed independently. Additionally, the receiver and transmitter can select its operating speed as one of 28 fixed baud rates; a 16X clock derived from a programmable counter/timer, or an external 1X or 16X clock. The baud rate generator and counter/timer can operate directly from a crystal or from external clock inputs. The ability to independently program the operating speed of the receiver and transmitter make the UART particularly attractive for dual-speed channel applications such as clustered terminal systems.
The receiver and transmitter is buffered by 8 or 16 character FIFOs to minimize the potential of receiver overrun, transmitter underrun and to reduce interrupt overhead in interrupt driven systems. In addition, a flow control capability is provided via RTS/CTS signaling to disable a remote transmitter when the receiver buffer is full.
DMA interface is and other general purpose signals are provided on the SC28L91 via a multipurpose 7-bit input port and a multipurpose 8-bit output port. These can be used as general-purpose ports or can be assigned specific functions (such as clock inputs or status/interrupt outputs, FIFO conditions) under program control.
The SC28L91 is available in two package versions: a 44-pin PLCC and 44-pin plastic quad flat pack (PQFP).
特性 Features
Member of IMPACT family: 3.3 to 5.0 volt , -40 Cel to +85 Cel and 68K for 80xxx bus interface for all devices.
A full-duplex independent asynchronous receiver/transmitter
16 character FIFOs for each receiver and transmitter
Pin programming selects 68K or 80xxx-bus interface
Programmable data format 5 to 8 data bits plus parity
Odd, even, no parity or force parity
- 1, 1.5 or 2 stop bits programmable in 1/16-bit increments
16-bit programmable Counter/Timer
Programmable baud rate for each receiver and transmitter selectable from: 28 fixed rates: 50 to 230.4 k baud
Other baud rates to 1 MHz at 16X
Programmable user-defined rates derived from a programmable counter/timer
External 1X or 16X clock
Parity, framing, and overrun error detection
False start bit detection
Line break detection and generation
Programmable channel mode Normal (full-duplex)
Automatic echo
Local loop back
Remote loop back
Multi-drop mode (also called 'wake-up' or '9-bit')
Multi-function 7-bit input port (includes IACKN) Can serve as clock or control inputs
Change of state detection on four inputs
Inputs have typically >100 kΩ pull-up resistors
Change of state detectors for modem control
Multi-function 8-bit output port Individual bit set/reset capability
Outputs can be programmed to be status/interrupt signals
FIFO status for DMA interface
Versatile interrupt system Single interrupt output with eight maskable interrupting conditions
Output port can be configured to provide a total of up to six separate interrupt outputs that may be wire ORed.
Each FIFO can be programmed for four different interrupt levels
Watchdog timer for the receiver
Maximum data transfer rates:
1X - 1 Mbit/s, 16X - 1 Mbit/s
Automatic wake-up mode for multi-drop applications
Start-end break interrupt/status with mid-character break detect.
On-chip crystal oscillator
Power-down mode
Receiver time-out mode
Single +3.3 V or +5 V power supply
技术参数
- 型号:
SC28L91A1B
- 功能描述:
UART 接口集成电路 UART SINGLE W/FIFO
- 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
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
恩XP |
24+ |
NA/ |
8735 |
原厂直销,现货供应,账期支持! |
询价 | ||
恩XP |
24+ |
标准封装 |
7996 |
全新原装正品/价格优惠/质量保障 |
询价 | ||
PHI |
04+ |
QFP |
2820 |
一级代理,专注军工、汽车、医疗、工业、新能源、电力 |
询价 | ||
PHI |
25+ |
QFP |
860000 |
明嘉莱只做原装正品现货 |
询价 | ||
PHI |
2138+ |
QFP |
8960 |
专营BGA,QFP原装现货,假一赔十 |
询价 | ||
PHI |
21+ |
QFP |
2890 |
只做原装正品,不止网上数量,欢迎电话微信查询! |
询价 | ||
恩XP |
25+ |
N/A |
6000 |
原装,请咨询 |
询价 | ||
恩XP |
24+ |
N/A |
6000 |
原装,正品 |
询价 | ||
恩XP |
24+ |
PQFP-44 |
30000 |
原装正品公司现货,假一赔十! |
询价 | ||
PHI |
03+ |
QFP-44 |
80 |
原装现货海量库存欢迎咨询 |
询价 |