SH7261 datasheet(954/1348 Pages) RENESAS

954 / 1348 page

Section 20 IEBus

TM Controller (IEB) [R5S72612] [R5S72613]

Rev. 2.00 Sep. 07, 2007 Page 922 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

RXEPE

R/(W)*

Parity Error

Indicates that a parity error has occurred during data

field reception. If a parity error occurs before data field

reception, the IEB immediately enters the wait state

and the RXEPE flag is not set.

If a parity error occurs when the maximum number of

receive bytes in one frame have not been received, the

RXEPE flag is not set yet. When a parity error occurs,

the IEB returns a NAK to the communications

destination unit via the acknowledge bit. In this case,

the communications destination unit continues

retransfer up to the maximum number of receive bytes

in one frame and if the reception has been completed

normally by clearing the parity error, the RXEPE flag is

not set. If the parity error is not cleared when the

reception is terminated before receiving data for the

number of bytes specified by the message length, the

RXEPE flag is set.

In broadcast reception, if a parity error occurs during

data field reception, the IEB enters the wait state

immediately after setting the RXEPE flag. This flag is

enabled only after the receive start flag (RXS) is set. If

this error occurs before the receive start flag is set, the

IEB stops communication and enters the wait state.

This bit is not set in this case.

[Setting condition]

• When the parity bit of the last data of the data field

is not correct after the maximum number of receive

bytes have been received

[Clearing condition]

• When 1 is written

Note:

only 1 can be written to clear the flag.

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