Toshiba TMPR4925, Manual

Page: 379 / 590

Chapter 11 Serial I/O Port
11-17
11.4.3 DMA/Interrupt Status Register 0 (SIDISR0) 0xF308 (Ch. 0)
DMA/Interrupt Status Register 1 (SIDISR1) 0xF408 (Ch. 1)
These registers indicate the DMA or interrupt status information.
31 16
0
: Type
: Initial value
15 14 13 12 11 10 9 8 7 6 5 4 0
UBRK
UVALID
UFER UPER UOER ERI TOUT TDIS RDIS STIS 0 RFDN
R R R R R
R/W0C R/W0C R/W0C R/W0C R/W0C
R : Type
0 1 0 0 0 0 0 1 0 0 00000 : Initial value
Bits Mnemonic Field Name Description
31:16
⎯
Reserved
⎯
15 UBRK Receive Break UART Break (Initial value: 0, R)
This field indicates the break reception status of the next data in the Receive FIFO to
be read. Reading the Receive FIFO Register (SIRFIFO) updates the status.
0: No breaks
1: Detect breaks
14 UVALID Receive FIFO
Available Status UART Available Data (Initial value: 1, R)
This field indicates whether or not data exists in the Receive FIFO (SIRFIFO).
0: Data exists in the Receive FIFO.
1: No data exists in the Receive FIFO.
13 UFER Frame Error UART Frame Error (Initial value: 0, R)
This field indicates the frame error status of the next data in the Receive FIFO to be
read. Reading the Receive FIFO Register (SIRFIFO) updates the status.
0: There are no frame errors.
1: There are frame errors.
12 UPER Parity Error UART Parity Error (Initial value: 0, R)
This field indicates the parity error status of the next data in the Receive FIFO to be
read. Reading the Receive FIFO Register (SIRFIFO) updates the status.
0: There are no parity errors.
1: There are parity errors.
11 UOER Overrun Error UART Overrun Error (Initial value: 0, R)
This register indicates the overrun status of the next data in the Receive FIFO to be
read. Reading the Receive FIFO Register (SIRFIFO) updates the status.
0: There are no overrun errors.
1: There are overrun errors.
10 ERI Reception Error
Interrupt Receive Data Error Interrupt (Initial value: 0, R/W0C)
This bit is immediately set to “1” when a reception error (Frame Error, Parity Error, or
Overrun Error) is detected.
9 TOUT Reception Time
Out Time Out (Initial value: 0, R/W0C)
This bit is set to “1” when a reception time out occurs.
8 TDIS Transmission
Data Empty Transmit DMA/Interrupt Status (Initial value: 1, R/W0C)
This bit is set when available space of the amount set by the Transmit FIFO Request
Trigger Level (TDIL) of the FIFO Control Register (SIFCR) exists in the Transmit
FIFO.
7 RDIS Reception Data
Full Receive DMA/Interrupt Status (Initial value: 0, R/W0C)
This bit is set when valid data of the amount set by the Receive FIFO Request
Trigger Level (RDIL) of the FIFO Control register (SIFCR) is stored in the Receive
FIFO.
Figure 11.4.3 DMA/Interrupt Status Register (1/2)