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參數(shù)資料
| 型號： | ST16C454CJ68TR-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 4/29頁 |
| 文件大小： | 0K |
| 描述： | IC UART QUAD 68PLCC |
| 標準包裝： | 250 |
| 特點： | * |
| 通道數(shù)： | 4，QUART |
| FIFO's： | 1 字節(jié) |
| 電源電壓： | 2.97 V ~ 5.5 V |
| 帶故障啟動位檢測功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 帶CMOS： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 68-LCC（J 形引線） |
| 供應商設備封裝： | 68-PLCC |
| 包裝： | 帶卷 (TR) |
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ST16C454
12
Rev. 3.31
Loop-back 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. MCR register bits 0-3 are used for
controlling loop-back diagnostic testing. In the loop-
back mode OP1 and OP2 in the MCR register (bits 3/
2) 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 12). The -CTS, -DSR, -CD, and -RI are discon-
nected from their normal modem control inputs pins,
and instead are connected internally 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 con-
verts 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 con-
trolled by the IER.
C1
22pF
C2
33pF
X1
1.8432 MHz
XTA
L
1
XTA
L
2
Figure 8, Crystal oscillator connection
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST16C454IJ68 | 制造商:EXAR 制造商全稱:EXAR 功能描述:QUAD UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART) |
| ST16C454IJ68-F | 功能描述:UART 接口集成電路 QUAD UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| ST16C454IJ68TR-F | 功能描述:UART 接口集成電路 QUAD UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| ST16C550 | 制造商:EXAR 制造商全稱:EXAR 功能描述:UART WITH 16-BYTE FIFO’s |
| ST16C550_05 | 制造商:EXAR 制造商全稱:EXAR 功能描述:UART WITH 16-BYTE FIFO’s |
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