参数资料
| 型号： | XR16M598IQ100-F |
| 厂商： | Exar Corporation |
| 文件页数： | 10/58页 |
| 文件大小： | 0K |
| 描述： | IC UART FIFO 16B OCTAL 100QFP |
| 标准包装： | 66 |
| 特点： | * |
| 通道数： | 8 |
| FIFO's： | 16 字节 |
| 规程： | RS485 |
| 电源电压： | 1.62 V ~ 3.63 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： | 100-BQFP |
| 供应商设备封装： | 100-QFP（14x20） |
| 包装： | 托盘 |
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XR16M598
18
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO
REV. 1.0.0
(Xon1, Xon2, Xoff1, Xoff2) and controls TX transmissions accordingly. Under the above described flow control
mechanisms, flow control characters are not placed (stacked) in the user accessible RX data buffer or FIFO.
In the event that the receive buffer is overfilling and flow control needs to be executed, the 598 automatically
sends an Xoff message (when enabled) via the serial TX output to the remote modem. The 598 sends the Xoff-
1,2 characters two character times (= time taken to send two characters at the programmed baud rate) after
the receive FIFO crosses the programmed trigger level. To clear this condition, the 598 will transmit the
programmed Xon-1,2 characters as soon as receive FIFO is less than one trigger level below the programmed
trigger level. Table 7 below explains this.
TABLE 7: AUTO XON/XOFF (SOFTWARE) FLOW CONTROL
RX TRIGGER LEVEL
INT PIN ACTIVATION
XOFF CHARACTER(S) SENT
(CHARACTERS IN RX FIFO)
XON CHARACTER(S) SENT
(CHARACTERS IN RX FIFO)
1
1*
0
4
4*
1
8
8*
4
14
14*
8
* After the trigger level is reached, an xoff character is sent after a short span of time (= time required to send 2 characters);
for example, after 2.083ms has elapsed for 9600 baud and 10-bit word length setting.
2.12
Special Character Detect
A special character detect feature is provided to detect an 8-bit character when bit-5 is set in the Enhanced
Feature Register (EFR). When this character (Xoff2) is detected, it will be placed in the FIFO along with normal
incoming RX data. The 598 compares each incoming receive character with Xoff-2 data. If a match exists, the
received data will be transferred to FIFO and ISR bit-4 will be set to indicate detection of special character.
Although the Internal Register Table shows Xon, Xoff Registers with 8 bits of character information, the actual
number of bits is dependent on the programmed word length. Line Control Register (LCR) bits 0-1 defines the
number of character bits, i.e., either 5 bits, 6 bits, 7 bits, or 8 bits. The word length selected by LCR bits 0-1
also determines the number of bits that will be used for the special character comparison. Bit-0 in the Xon, Xoff
Registers corresponds to the LSB bit for the receive character.
相关PDF资料 |
PDF描述 |
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| XR16M654IQ100-F | IC UART FIFO 64B QUAD 100QFP |
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| XR16M680IM48-F | IC UART FIFO 32B 48TQFP |
| XR16M681IL32-F | IC UART FIFO 64B 32QFN |
| XR16M698IQ100-F | IC UART FIFO 32B OCTAL 100QFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XR16M654 | 制造商:EXAR 制造商全称:EXAR 功能描述:1.62V TO 3.63V QUAD UART WITH 64-BYTE FIFO |
| XR16M654D | 制造商:EXAR 制造商全称:EXAR 功能描述:1.62V TO 3.63V QUAD UART WITH 64-BYTE FIFO |
| XR16M654DIV-0A-EVB | 功能描述:界面开发工具 Eval Board for XR16M654DIV-0A 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 |
| XR16M654DIV-0B-EVB | 功能描述:界面开发工具 Eval Board for XR16M654DIV-0B 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 |
| XR16M654DIV64 | 制造商:EXAR 制造商全称:EXAR 功能描述:1.62V TO 3.63V QUAD UART WITH 64-BYTE FIFO |
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