UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 246
UPD78F0988AGC-8BS
Manufacturer Part Number
UPD78F0988AGC-8BS
Description
Manufacturer
Renesas Electronics America
Datasheet
1.UPD78F0988AGC-8BS.pdf
(431 pages)
Specifications of UPD78F0988AGC-8BS
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(b) Parity types and operation
The parity bit is used to detect a bit error in the communication data. Normally, the same kind of parity
bit is used on the transmitting side and the receiving side. With even parity and odd parity, a one-bit (odd
number) error can be detected. With 0 parity and no parity, an error cannot be detected.
(i) Even parity
(ii) Odd parity
(iii) 0 Parity
(iv) No parity
• Transmission
• Reception
• Transmission
• Reception
When transmitting, the parity bit is set to 0 irrespective of the transmit data.
At reception, a parity bit check is not performed. Therefore, a parity error is not generated, irrespective
of whether the parity bit is set to 0 or 1.
A parity bit is not added to the transmit data. At reception, data is received assuming that there is
no parity bit. Since there is no parity bit, a parity error is not generated.
The number of bits with a value of “1”, including the parity bit, in the transmit data is controlled to
be even. The value of the parity bit is as follows:
Number of bits with a value of “1” in transmit data is odd: 1
Number of bits with a value of “1” in transmit data is even: 0
The number of bits with a value of “1”, including the parity bit, in the receive data is counted. If
it is odd, a parity error occurs.
Conversely to the situation with even parity, the number of bits with a value of “1”, including the
parity bit, in the transmit data is controlled to be odd. The value of the parity bit is as follows:
Number of bits with a value of “1” in transmit data is odd: 0
Number of bits with a value of “1” in transmit data is even: 1
The number of bits with a value of “1”, including the parity bit, in the receive data is counted. If
it is even, a parity error occurs.
CHAPTER 12 SERIAL INTERFACES UART00 AND UART01
User’s Manual U13029EJ7V1UD
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