NEC UPD703116 User Manual page 463

(b) Odd parity
<1> During transmission
In contrast to even parity, the parity bit is controlled so that the number of bits with the value "1" within
the transmit data including the parity bit is odd. The parity bit value is as follows.
• If the number of bits with the value "1" within the transmit data is odd: 0
• If the number of bits with the value "1" within the transmit data is even: 1
<2> During reception
The number of bits with the value "1" within the receive data including the parity bit is counted, and a
parity error is generated if this number is even.
(c) 0 parity
During transmission, the parity bit is set to "0" regardless of the transmit data.
During reception, no parity bit check is performed. Therefore, no parity error is generated regardless of
whether the parity bit is "0" or "1".
(d) No parity
No parity bit is added to the transmit data.
During reception, the receive operation is performed as if there were no parity bit. Since there is no
parity bit, no parity error is generated.
CHAPTER 10 SERIAL INTERFACE FUNCTION
User's Manual U14492EJ5V0UD
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