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7641

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

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MITSUBISHI MICROCOMPUTERS

7641 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

qVersion Information Output Command

This command outputs the version information of the control pro-

gram stored in the Boot ROM area. Execute the version

information output command as explained here following.

(1) Transfer the “FB16” command code with the 1st byte.

(2) The version information will be output from the 2nd byte on-

ward.

This data is composed of 8 ASCII code characters.

SCLK

SRXD

FB16

STXD

‘V’

‘E’

‘R’

‘X’

SRDY (BUSY)

Fig. 112 Timing for version information output

qBoot ROM Area Output Command

This command reads the control program stored in the Boot ROM

area in page (256 bytes) unit. Execute the Boot ROM area output

command as explained here following.

(1) Transfer the “FC16” command code with the 1st byte.

(2) Transfer addresses AB8 to AB15 and AB16 to AB23 with the 2nd

and 3rd bytes respectively.

(3) From the 4th byte onward, data (DB0 to DB7) for the page (256

bytes) specified with addresses AB8 to AB23 will be output se-

quentially from the smallest address first synchronized with the

fall of the clock.

SCLK

SRXD

STXD

FC16

AB8 to

AB15

AB16 to

AB23

data0

SRDY(BUSY)

Fig. 113 Timing for Boot ROM area output

data255

131

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