Line Status Register (Sclsr2) - Hitachi SH7750 Hardware Manual

16.2.12 Line Status Register (SCLSR2)

Bit:
Initial value:
R/W:
Bit:
Initial value:
R/W:
Note: * Only 0 can be written, to clear the flag.
Bits 15 to 1—Reserved: These bits are always read as 0, and should only be written with 0.
Bit 0—Overrun Error (ORER): Indicates that an overrun error occurred during reception,
causing abnormal termination.
Bit 0: ORER
0
1
Notes: *1 The ORER flag is not affected and retains its previous state when the RE bit in
SCSCR2 is cleared to 0.
*2 The receive data prior to the overrun error is retained in SCFRDR2, and the data
received subsequently is lost. Serial reception cannot be continued while the ORER flag
is set to 1.
Rev. 6.0, 07/02, page 684 of 986
15 14 13
— — —
0 0
R R
7 6
— — —
0 0
R R
Description
Reception in progress, or reception has ended normally *
[Clearing conditions]
•
Power-on reset or manual reset
•
When 0 is written to ORER after reading ORER = 1
An overrun error occurred during reception *
[Setting condition]
When the next serial reception is completed while the receive FIFO is full
12 11
— —
0 0 0
R R R
5 4 3
— —
0 0 0
R R R
10 9
— —
0 0
R R
2 1
— —
0 0
R R
1
(Initial value)
2
8
—
0
R
0
ORER
0
(R/W)*