EMERSON VE4001S2T2B5离散输入卡
Quad UART提供四个异步串行端口，这些端口被路由到P2连接器。来自每个端口的RX、TX、CTS和RTS的TTL电平信号通过板载RS-232驱动器和接收器路由到P2连接器，在P2连接器中，信号可以由转换模块拾取。QUART的参考时钟频率为1.8432MHz。所有UART端口都能够以高达115 Kbaud的速率发送信号。有关更多详细信息和/或编程信息，请参阅ST16C554D数据表。4.8.4控制和定时器PLD MVME7100控制和定时器的PLD位于本地总线上。控制和定时器PLD在板上提供以下功能： 本地总线地址锁存器 闪存库、MRAM和Quad UART的芯片选择 系统控制和状态寄存器 四个32位计时计时器 看门狗计时器 RTC 1MHz参考时钟
The Quad UART provides four asynchronous serial ports which are routed to the P2 connector. The TTL-level signals of RX, TX, CTS, and RTS from each port are routed through on-board RS-232 drivers and receivers to the P2 connector where the signals can be picked up by a transition module. The reference clock frequency for the QUART is 1.8432MHz. All UART ports are capable of signaling at up to 115 Kbaud. Refer to the ST16C554D data sheet for additional details and/or programming information. 4.8.4 Control and Timers PLD The MVME7100 Control and Timers PLD resides on the local bus. The Control and Timers PLD provides the following functions on the board: Local bus address latch Chip selects for flash banks, MRAM, and Quad UART System control and status registers Four 32-bit tick timers Watch Dog Timer RTC 1MHz reference clock
