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參數(shù)資料
| 型號： | XR16V698IQ100-F |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 20/58頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC UART FIFO 32B OCTAL 100QFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 特點： | * |
| 通道數(shù)： | 8 |
| FIFO's： | 32 字節(jié) |
| 規(guī)程： | RS485 |
| 電源電壓： | 2.25 V ~ 3.6 V |
| 帶自動流量控制功能： | 是 |
| 帶IrDA 編碼器/解碼器： | 是 |
| 帶故障啟動位檢測功能： | 是 |
| 帶調(diào)制解調(diào)器控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 100-BQFP |
| 供應(yīng)商設(shè)備封裝： | 100-QFP（14x20） |
| 包裝： | 托盤 |
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XR16V698
27
REV. 1.0.3
2.25V TO 3.6V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
TIMER OPERATION
The following paragraphs describe the operation of the 16-bit Timer/Counter. The following conventions will be
used in this discussion:
■ ’N’ is the 16-bit value programmed in the TIMER MSB, LSB registers
■ ‘N’ can take any value from 0x0002 to 0xFFFF.
Timer Interrupt
In the one-shot mode, the Timer will issue an interrupt ’N’ clocks after the Timer is started. This is the time
when the Timer times-out in the one-shot mode. In the re-triggerable mode, the Timer will keep issuing an
interrupt every ’N’ clocks. This is shown in Figure 15, where the time between successive time-outs (in re-
triggereble mode) is ’N’ clocks. The Timer interrupt can be cleared by reading the TIMERCNTL register. The
TIMERCNTL will read a value of 0x01 when there is an interrupt and a 0x00 at all other times.
TABLE 10: TIMER CONTROL COMMANDS
TIMERCNTL [7:4]
Reserved
TIMERCNTL [3:0]
These bits are used to invoke a series of commands that control the function of the Timer/Counter.
The commands 1011 to 1111 are reserved.
0001: Enable Timer Interrupt
0010: Disable Timer Interrupt (default)
0011: Select One-shot mode
0100: Select Re-triggerable mode (default)
0101: Select Internal Crystal Oscillator output as clock source for the Timer (default)
0110: Select External Clock source (through TMRCK pin) for the Timer
0111: Reserved
1000: Reserved
1001: Start Timer
1010: Stop Timer (default)
1011: Reset Timer
Upon power-up or reset, the default states are Timer interrupt disabled, Re-triggerable mode, Crystal
Oscillator as Timer clock source, and Timer stopped.
FIGURE 14. TIMER/COUNTER CIRCUIT
Timer Interrupt
TMRCK
OSC. CLOCK
TIMERCNTL
COMMANDS
16-Bit
Timer/Counter
Start/Stop
Timer Interrupt Enable/ Disable
Single shot/Re-triggerable
TIMERMSB and TIMERLSB
(16-bit Value)
0
1
Clock Select
0
1
Timer Interrupt
No Interrupt
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR16V698IQ100TR-F | 制造商:Exar Corporation 功能描述:UART 8-CH 32Byte FIFO 2.5V/3.3V 100-Pin PQFP T/R 制造商:Exar Corporation 功能描述:XR16V698IQ100TR-F |
| XR16V794 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL |
| XR16V794_08 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL |
| XR16V794IV | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE 2.25V TO 3.6V QUAD UART WITH FRACTIONAL |
| XR16V794IV-0A-EVB | 功能描述:UART 接口集成電路 Supports V794 64 ld TQFP,ISA Interface 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 |
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