M16C6K9 Datasheet, PDF (283/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Standard Serial I/O Mode
Version information output function
The version information of the control program stored in boot ROM area can be output by the function.
Execute the command as follows:
(1) Transfer the command code “FB16” in the 1^st byte.
(2) From the 2^nd byte onward, the version information will be output. The information is composed of 8 ASCII
character code.
CLK10
RxD10
(M16C reception data)
FB16
TxD10
(M16C transmit data)
'V'
'E'
'R'
'X'
RTS10(BUSY)
Fig.EE-8 Timing of version information output function
Boot ROM area output function
The control program stored in boot ROM area can be read out in page (256 bytes) unit by the function.
Execute the command as follows:
(1) Transfer the command code “FC16” in the 1^st byte.
(2) Transfer addresses A15–A8 and A23–A16 in the 2^nd and 3^rd bytes respectively.
From the 4^th byte onward, the data (D7–D0) specified in page (256 bytes) address A23–A8 will be output
sequentially from the smallest address in sync with the rising edge of the clock.
CLK10
RxD10
(M16C reception data)
TxD10
(M16C transmit data)
RTS10(BUSY)
FC16
A8 to A16 to
A15 A23
Data0
Fig.EE-9 Timing og boot ROM area output function
Data255
Rev.1.00 Jun 06, 2003 page 283 of 290