Renesas Hitachi H8S/2194 Series Hardware Manual page 476

Bit 3: Stop Bit Length (STOP)
Selects 1 or 2 bits as the stop bit length in asynchronous mode. The STOP bit setting is only
valid in asynchronous mode. If synchronous mode is set the STOP bit setting is invalid since
stop bits are not added.
Bit 3
STOP Description
0 1 stop bit
1 2 stop bits
Notes: 1. In transmission, a single 1 bit (stop bit) is added to the end of a transmit character
before it is sent.
2. In transmission, two 1 bits (stop bits) are added to the end of a transmit character
before it is sent.
In reception, only the first stop bit is checked, regardless of the STOP bit setting. If the second
stop bit is 1, it is treated as a stop bit; if it is 0, it is treated as the start bit of the next transmit
character.
Bit 2: Multiprocessor Mode (MP)
Selects multiprocessor format. When multiprocessor format is selected, the PE bit and O/
parity settings are invalid. The MP bit setting is only valid in asynchronous mode; it is invalid
in synchronous mode.
For details of the multiprocessor communication function, see section 23.3.3, Multiprocessor
Communication Function.
Bit 2
MP Description
0 Multiprocessor function disabled
1 Multiprocessor format selected
*1
*2
(Initial value)
(Initial value)
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