- 您现在的位置：买卖IC网 > PDF目录11815 > SC28C94A1N,112 (NXP Semiconductors)IC UART QUAD W/FIFO 48-DIP PDF资料下载
参数资料
| 型号： | SC28C94A1N,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 13/39页 |
| 文件大小： | 0K |
| 描述： | IC UART QUAD W/FIFO 48-DIP |
| 标准包装： | 7 |
| 特点： | 故障启动位检测 |
| 通道数： | 4，QUART |
| FIFO's： | 8 字节 |
| 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 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 通孔 |
| 封装/外壳： | 48-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 48-DIP |
| 包装： | 管件 |
| 其它名称： | 568-1115-5 935262535112 SC28C94A1N |
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页第11页第12页当前第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页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页
Philips Semiconductors
Product data sheet
SC28C94
Quad universal asynchronous receiver/transmitter (QUART)
2006 Aug 09
20
In the counter mode, the C/T counts down the number of pulses
loaded in CTUR and CTLR by the CPU. Counting begins upon
receipt of a start counter command. Upon reaching the terminal
count H‘0000’, the counter ready interrupt bit (ISR[3]) is set. The
counter rolls over to 65535 and continues counting until stopped by
the CPU. If I/O is programmed to be the output of the C/T, the output
remains High until the terminal count is reached, at which time it
goes Low. The output returns to the High state and ISR[3] is cleared
when the counter is stopped by a stop counter command. The CPU
may change the values of CTUR and CTLR at any time, but the new
count becomes effective only on the next start counter command. If
new values have not been loaded, the previous values are
preserved and used for the next count cycle.
In the counter mode, the current value of the upper and lower eight
bits of the counter (CTU, CTL) may be read by the CPU. It is
recommended that the counter be stopped when reading to prevent
potential problems which may occur if a carry from the lower eight
bits to the upper eight bits occurs between the times that both
halves of the counter is read. However, note that a subsequent start
counter command will cause the counter to begin a new count cycle
using the values in CTUR and CTLR.
I/O LOGIC
The QUART has four I/O pins for each channel. These pins may be
individually programmed as an input or output under control of the
I/OPCR (I/O Port Control Register). Functions which may use the
I/O pins as inputs (Rx or Tx external clock, for example) are always
sensitive to the signal on the I/O pin regardless of it being
programmed as an input or an output. For example if I/O1a was
programmed to output the RxC1X clock and the Counter/Timer was
programmed to use I/O pin as its clock input the result would be the
Counter/Timer being clocked by the RxC1X clock.
The 16 I/O ports are accessed and/or controlled by five (5) registers:
IPR, ACR, I/OPCR, IPCR, OPR. They are shown in Table 8 of this
document. Each UART has four pins. Two of these pins have
“Change of State Detectors” (COS). These detectors set
whenever the pin to which they are attached changes state. (1 to 0
or 0 to 1) The “Change of State Detectors” are enabled via the
ACR. When enabled the COS devices may generate interrupts via
the IMR and IPCR registers. Note that when the COS interrupt is
enabled that any one or more of the four COS bits in the IPCR will
enable the COS bidding. Each of the channel’s four I/O lines are
configured as inputs on reset.
The Change of State detectors sample the I/O pins at the rate of the
38.4KHz clock. A change on the pin will be required to be stable for
at least 26.04
s and as much as 52.08s for the COS detectors to
confirm a change. Note that changes in the X1/clock frequency will
effect this stability requirement.
COS detectors are reset by a read of the IPCR.
相关PDF资料 |
PDF描述 |
|---|---|
| V24C24H150B | CONVERTER MOD DC/DC 24V 150W |
| SC16C554DIA68,512 | IC UART QUAD W/FIFO 68-PLCC |
| AT32UC3L064-D3HR | MCU AVR32 64K FLASH 48TTLGA |
| ST16C550CP40 | IC UART FIFO 16BYTE 40PDIP |
| V24B24H150BG3 | CONVERTER MOD DC/DC 24V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC28L194 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Quad UART for 3.3V and 5V supply voltage |
| SC28L194A1A | 功能描述:UART 接口集成电路 3V-5V 4CH UART INTEL/MOT INTRF 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 |
| SC28L194A1A,512 | 功能描述:UART 接口集成电路 3V-5V 4CH 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 |
| SC28L194A1A,518 | 功能描述:UART 接口集成电路 3V-5V 4CH 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 |
| SC28L194A1A,529 | 功能描述:UART 接口集成电路 3V-5V 4CH 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 |
发布紧急采购，3分钟左右您将得到回复。