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参数资料
| 型号： | XR16V598IQ-0A-EVB |
| 厂商： | Exar Corporation |
| 文件页数： | 20/58页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR XR16V598-A 100QFP |
| 标准包装： | 1 |
| 系列： | * |
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XR16V598
27
REV. 1.0.3
2.25V TO 3.6V HIGH PERFORMANCE OCTAL UART WITH 16-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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| XR16M698IQ-0B-EVB | EVAL BOARD FOR M698-B 100QFP |
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相关代理商/技术参数 |
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|---|---|
| XR16V598IQ-0B-EVB | 功能描述:界面开发工具 Supports V598 100 LD QFP, PCI Interface RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| XR16V598IQ100 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.25V TO 3.6V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO |
| XR16V598IQ100-F | 功能描述:UART 接口集成电路 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 |
| XR16V654 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.25V TO 3.6V QUAD UART WITH 64-BYTE FIFO |
| XR16V654_0709 | 制造商:EXAR 制造商全称:EXAR 功能描述:2.25V TO 3.6V QUAD UART WITH 64-BYTE FIFO |
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