srts
Shadow Request to Send.
| Module Instance | Base Address | Register Address |
|---|---|---|
| i_uart_0_uart | 0xFFC02000 | 0xFFC0208C |
| i_uart_1_uart | 0xFFC02100 | 0xFFC0218C |
Offset: 0x8C
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
| Bit Fields | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
rsvd_srts_31to1 RO 0x0 |
|||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
rsvd_srts_31to1 RO 0x0 |
srts RW 0x0 |
||||||||||||||
srts Fields
| Bit | Name | Description | Access | Reset | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 31:1 | rsvd_srts_31to1 | Reserved bits [31:1] - Read Only |
RO | 0x0 | ||||||
| 0 | srts | Shadow Request to Send. This is a shadow register for the RTS bit (MCR[1]), this can be used to remove the burden of having to performing a read modify write on the MCR. This is used to directly control the Request to Send (rts_n) output. The Request To Send (rts_n) output is used to inform the modem or data set that the UART is ready to exchange data. When Auto RTS Flow Control is not enabled (MCR[5] set to zero), the rts_n signal is set low by programming MCR[1] (RTS) to a high. In Auto Flow Control, AFCE_MODE == Enabled and active (MCR[5] set to one) and FIFO's enable (FCR[0] set to one), the rts_n output is controlled in the same way, but is also gated with the receiver FIFO threshold trigger (rts_n is inactive high when above the threshold) only when RTC Flow Trigger is disabled; otherwise it is gated by the receiver FIFO almost-full trigger, where almost full refers to two available slots in the FIFO (rts_n is inactive high when above the threshold). Note that in Loopback mode (MCR[4] set to one), the rts_n output is held inactive high while the value of this location is internally looped back to an input.
|
RW | 0x0 |