M16C6K9 Datasheet, PDF (279/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Standard Serial I/O Mode
The following are the descriptions of S/W commands
Page read command
The command reads the specified page (256 bytes) of the flash memory sequentially one byte at a time.
Execute the page read command as following:
(1) Transfer the “FF16” command code in the 1^st byte.
(2) Transfer addresses A8– A15 and A16– A23 in the 2^nd and 3^rd byte respectively.
(3) From the 4^th byte onward, data (D7–D0) of the page specified by the address (A23–A8) will be output
sequentially from the smallest address sync with the falling edge of the clock.
CLK10
RxD10
(M16C reception data)
TxD10
(M16C transmit data)
RTS10(BUSY)
FF16
A8 to
A15
A16 to
A23
Data0
Data255
Fig.EE-2 Timing of page read
Read status register command
The command is for reading status information. When command code “7016” is sent in the 1^st byte, the
contents of status register (SRD) and status register 1 (SRD1) will be output in the 2^nd and 3^rd byte respectively
sync with the falling edge of the clock.
CLK10
RxD10
(M16C reception data)
TxD10
(M16C transmit data)
RTS10(BUSY)
Fig.EE-3 Timing of read status register
7016
SRD SRD1
output output
Rev.1.00 Jun 06, 2003 page 279 of 290