Panasonic MN103S

Chapter 12
Serial interface 0 and 1
XII - 8 Control Registers
12.2.4 Serial Status Registers
The serial status register indicates operation status for serial interface.
Table: 12.2.2 shows generation cause and flag update timing for SCAnFE, SCAnPE, an SCAnOE flags.
Table:12.2.2 Generation Cause and Update Timing of Flags Related with Error
■ Serial 0 Status Register (SC0STR: 0x0000A109) [8,16-bit Access Register]
Error Generation cause Flag update timing
Framing error When “0” is received at stop bit recep-
tion
At stop bit reception
Parity error When “1” is received at parity bit fixed to
0, when “0” is received at parity bit fixed
to 1, when “odd number” is received at
even parity and when “even number” is
received at odd parity.
At parity bit reception
Overrun error When reception of the next data is com-
pleted before reception data is read by
SCnRB register
At reception of the last bit data
bp 76543210
Flag SCA0
TBSY
SCA0
RBSY
-
SCA0
RXA
-
SCA0
FE
SCA0
PE
SCA0
OE
At reset 00000000
Access RRRRRRRR
bp Flag Description Setting condition
7SCA0TBSY
Transmission status flag 0: Can transmit
1: On transmitting
6SCA0RBSY
Reception status flag 0: Can receive
1: On receiving
5-- -
4SCA0RXA
Reception data flag 0: No available
1: Available
3-- -
2SCA0FE
Framing error 0: No error detected
1: Error detected
1SCA0PE
Parity error 0: No error detected
1: Error detected
0SCA0OE
Overrun error 0: No error detected
1: Error detected