H8SXSLASH1663M datasheet(1219/1504 Pages) RENESAS

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Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1187 of 1468

REJ09B0412-0200

Error Response

H'BF

ERROR

• Error response, H'BF, (one byte): Error response to selection of new bit rate

• ERROR: (one 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.

(4)

Receive Data Check

The methods for checking of receive 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

The calculated operating frequency should be checked to ensure that it is within the range of

minimum to maximum frequencies which are available with the clock modes of the specified

device. When it is out of this range, an operating frequency error is generated.

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