Datasheet

Section 22 Flash Memory
R01UH0309EJ0500 Rev. 5.00 Page 1185 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
• SUM (1 byte): Checksum
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 Response H'BF ERROR
• Error response, H'BF, (1 byte): Error response to selection of new bit rate
• ERROR: (1 byte): Error code
H'11: Sum check error
H'24: Bit-rate selection disable error
The rate is not available.
H'25: Input frequency error
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.
(5) 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
a multiplication or division ratio for 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
The 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