Renesas H8S/2319 series Hardware Manual page 773

Response H'06
• Response, H'06, (1 byte): Response to selection of a new bit rate
When it is possible to set the bit rate, the response will be ACK.
Error H'BF
Response
• Error response, H'BF, (1 byte): Error response to selection of new bit rate
• ERROR: (1 byte): Error code
H'11: Sum checking error
H'24: Bit-rate selection error
The rate is not available.
H'25: Error in input frequency
This input frequency is not within the specified range.
H'26: Multiplication-ratio error *
The ratio does not match an available ratio.
H'27: Operating frequency error *
The frequency is not within the specified range.
Note: * This error does not occur with this LSI.
Received Data Check
The methods for checking of received data are listed below.
(1) Input frequency
The received value of the input frequency is checked to ensure that it is within the range of
minimum to maximum frequencies which matches the clock modes of the specified device. When
the value is out of this range, an input-frequency error is generated.
(2) Multiplication ratio
The received value of the multiplication ratio or division ratio is checked to ensure that it matches
the clock modes of the specified device. When the value is out of this range, an input-frequency
error is generated.
(3) Operating frequency error
Operating frequency is calculated from the received value of the input frequency and the
multiplication or division ratio. The input frequency is input to the LSI and the LSI is operated at
the operating frequency. The expression is given below.
Operating frequency = Input frequency × Multiplication ratio , or
Operating frequency = Input frequency ÷ Division ratio
ERROR
Rev. 5.00, 12/03, page 743 of 1088