SH7055S Datasheet, PDF(855/1002 Page) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

SH7055S Datasheet, PDF (855/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

◁

ï£§ Bit rate (two bytes): New bit rate

One hundredth of the value (e.g. when the value is 19200 bps, the bit rate is 192, which is

H'00C0)

ï£§ Input frequency (two bytes): Frequency of the clock input to the boot program

This value is valid to the hundredths place and represents the value in MHz multiplied by

100. (e.g. when the value is 28.882 MHz, it will be multiplied by 100 to be 2888 which is

H'0B48.

ï£§ Number of multiplication ratios (one byte): Number of multiplication ratios to which the

device can be set.

ï£§ Multiplication ratio 1 (one byte): Value of the multiplication or division ratio for the main

operating frequency

Multiplication ratio: Value of the multiplication ratio (e.g. when the clock frequency is

multiplied by four, the multiplication ratio will be H'04.)

Division ratio: Value of the division ratio, inverted to be a negative number (e.g. when the

clock is divided by two, the value of division ratio will be H'FE. H'FE = â2)

ï£§ Multiplication ratio 2 (one byte): Value of the multiplication or division ratio for the

peripheral operating frequency

Multiplication ratio: Value of the multiplication ratio (e.g. when the clock frequency is

multiplied by four, the multiplication ratio will be H'04.)

Division ratio: Value of the division ratio, inverted to be a negative number (e.g. when the

clock is divided by two, the value of division ratio will be H'FE. H'FE = â2)

ï£§ SUM (one byte): Checksum

Response H'06

ï£§ Response: H'06 (one 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

ï£§ Error response: H'BF (one byte): Error response to selection of new bit rate

ï£§ ERROR: (one byte): Error code

H'11: Sum check error

H'24: Bit-rate selection error

This bit rate is not available.

H'25: Input frequency error

This input frequency is not within the range set by the minimum and maximum

values.

H'26: Multiplication ratio error

This ratio does not match an available ratio.

H'27: Operating frequency error

This operating frequency is not within the range set by the minimum and

maximum values.

The methods for checking of received data are listed below.

Rev.2.0, 07/03, page 817 of 960

▷