参数资料
| 型号： | XR16L784CV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 15/51页 |
| 文件大小： | 0K |
| 描述： | IC UART 8B 3.3V QUAD 64LQFP |
| 标准包装： | 160 |
| 特点： | * |
| 通道数： | 4，QUART |
| FIFO's： | 64 字节 |
| 规程： | RS485 |
| 电源电压： | 2.97 V ~ 5.5 V |
| 带自动流量控制功能： | 是 |
| 带IrDA 编码器/解码器： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 托盘 |
| 其它名称： | 1016-1281 |
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XR16L784
22
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
REV. 1.2.3
3.1.2
General Purpose 16-bit Timer/Counter. [TIMERMSB, TIMELSB, TIMER, TIMECNTL] (DEFAULT
0XXX-XX-00-00)
A 16-bit down-count timer for general purpose timer or counter. Its clock source may be selected from internal
crystal oscillator or externally on pin TMRCK. The timer can be set to be a single-shot for a one-time event or
re-triggerable for a periodic event. An interrupt may be generated in the INT Register when the timer times out.
It is controlled through 4 configuration registers [TIMERCNTL, TIMER, TIMELSB, TIMERMSB]. These
registers provide start/stop and re-triggerable or one-shot operation. The time-out output of the Timer can be
set to generate an interrupt for system or event alarm.
TABLE 9: UART CHANNEL [3:0] INTERRUPT SOURCE ENCODING AND CLEARING
PRIORITY
BIT2 BIT1 BIT0
INTERRUPT SOURCE(S) AND CLEARING
x
0
None
1
0
1
RXRDY & RX Line Status (logic OR of LSR[4:1]). RXRDY INT clears by reading data in the
RX FIFO until it falls below the trigger level; RX Line Status INT cleared after reading LSR
register.
2
0
1
0
RXRDY Time-out: Cleared when the FIFO becomes empty.
3
0
1
TXRDY, THR or TSR (auto RS485 mode) empty, clears after reading ISR register.
4
1
0
MSR, RTS/CTS or DTR/DSR delta or Xoff/Xon or special character detected. The first two
clear after reading MSR register; Xoff/Xon or special char. detect INT clears after reading
ISR register.
5
1
0
1
Reserved.
6
1
0
Reserved.
7
1
TIMER Time-out, shows up as a channel 0 INT. It clears after reading the TIMERCNTL regis-
ter. Reserved in other channels.
FIGURE 15. TIMER/COUNTER CIRCUIT.
TABLE 10: TIMER CONTROL REGISTER
TIMERCNTL [0]
Logic 0 (default) disables Timer-Counter interrupt and logic one enables the interrupt, reading the
TIMERCNTL clears the interrupt.
TIMERCNLT [1]
Logic 0 (default) stops/pauses the timer and logic one starts/re-starts the timer/counter.
TIMERCNTL [2]
Logic0 (default) selects re-trigger timer function and logic one selects one-shot (timer function.
TIMERCNTL [3]
Logic 0 (default) selects internal and logic one selects external clock to the timer/counter.
TIMERCNTL [7:4]
Reserved (defaults to zero).
TMRCK
OSC. CLOCK
TIMERCNTL [3]
16-Bit
Timer/Counter
TIMERCNTL [2]
Re-trigger
Single-shot
TIMERCNTL [1]
Start/Stop
TIMERCNTL [0]
Timer Interrupt, Ch-0 INT=7
Time-out
Timer Interrupt Enable
Single/Re-triggerable
TIMERMSB and TIMERLSB
(16-bit Value)
0
1
0
1
0
1
No Interrupt
Clock
Select
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| XR16L784CVTR-F | 功能描述:UART 接口集成电路 3.3V QUAD 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 |
| XR16L784IV | 制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART |
| XR16L784IV-F | 功能描述:UART 接口集成电路 2.97V-5.5V 64B FIFO temp -45 to 85C 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 |
| XR16L784IVTR-F | 功能描述:UART 接口集成电路 PCI BUS QUAD 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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