参数资料
| 型号： | ST16C450CJ44TR-F |
| 厂商： | Exar Corporation |
| 文件页数： | 2/28页 |
| 文件大小： | 0K |
| 描述： | IC UART SINGLE 44PLCC |
| 标准包装： | 500 |
| 特点： | * |
| 通道数： | 1，UART |
| FIFO's： | 1 字节 |
| 电源电压： | 2.97 V ~ 5.5 V |
| 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： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC（16.59x16.59） |
| 包装： | 带卷 (TR) |
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ST16C450
10
Rev. 4.20
Figure 3, EXTERNAL CRYSTAL OSCILLATOR
CONNECTION
Loopback Mode
The internal loop-back capability allows onboard diag-
nostics. In the loop-back mode the normal modem
interface pins are disconnected and reconfigured for
loop-back internally. In this mode MSR bits 4-7 are
also disconnected. However, MCR register bits 0-3
can be used for controlling loop-back diagnostic test-
ing. In the loop-back mode -OP1 and -OP2 in the MCR
register (bits 0-1) control the modem -RI and -CD
inputs respectively. MCR signals -DTR and -RTS (bits
0-1) are used to control the modem -CTS and -DSR
inputs respectively. The transmitter output (TX) and
the receiver input (RX) are disconnected from their
associated interface pins, and instead are connected
together internally (See Figure 4). The -CTS, -DSR, -CD,
and -RI are disconnected from their normal modem
control inputs pins, and instead are connected inter-
nally to -DTR, -RTS, -OP1 and -OP2. Loop-back test
data is entered into the transmit holding register via the
user data bus interface, D0-D7. The transmit UART
serializes the data and passes the serial data to the
receive UART via the internal loop-back connection. The
receive UART converts the serial data back into parallel
data that is then made available at the user data
interface, D0-D7. The user optionally compares the
received data to the initial transmitted data for verifying
error free operation of the UART TX/RX circuits.
In this mode , the receiver and transmitter interrupts are
fully operational. The Modem Control Interrupts are also
operational. However, the interrupts can only be read
using lower four bits of the Modem Control Register
(MCR bits 0-3) instead of the four Modem Status
Register bits 4-7. The interrupts are still controlled by
the IER.
C1
22pF
C2
33pF
X1
1.8432 MHz
R1
50-120
R2
1M
X
T
AL1
X
T
AL2
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相关代理商/技术参数 |
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|---|---|
| ST16C450CP40 | 功能描述:UART 接口集成电路 SINGLE 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 |
| ST16C450CP40 | 制造商:STARTECH 功能描述:IC CMOS UART 16C450 DIP40 |
| ST16C450CP40-F | 功能描述:UART 接口集成电路 SINGLE 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 |
| ST16C450CQ48 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| ST16C450CQ48-F | 功能描述:UART 接口集成电路 SINGLE 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 |
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