M3850 RENESAS [Renesas Technology Corp], M3850 Datasheet - Page 58

• Manufacturer Part Number: M3850
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
• Manufacturer: RENESAS [Renesas Technology Corp]

3850 Group (Spec.A)
Fig. 58 Timing for clear status register
This command writes the specified page (256 bytes) in the flash
memory sequentially one byte at a time. Execute the page pro-
gram command as explained here following.
(1) Transfer the “41
(2) Transfer addresses A
Rev.2.10
REJ03B0093-0210
This command clears the bits (SR4, SR5) which are set when the
status register operation ends in error. When the “50
code is sent with the 1st byte, the aforementioned bits are
cleared. When the clear status register operation ends, the S
(BUSY) signal changes from “H” to “L” level.
Fig. 59 Timing for page program
Page Program Command
Clear Status Register Command
2nd and 3rd bytes respectively.
2005.11.14
16
S
” command code with the 1st byte.
RDY1
8
to A
page 58 of 86
(BUSY)
S
15
CLK1
RxD
TxD
and A
16
to A
S
RDY1
23
41
(“00
(BUSY)
16
16
S
16
” command
CLK1
RxD
TxD
”) with the
A
A
8
15
RDY1
to
A
A
16
23
to
50
(3) From the 4th byte onward, as write data (D
When reception setup for the next 256 bytes ends, the S
(BUSY) signal changes from “H” to “L” level. The result of the
page program can be known by reading the status register. For
more information, see the section on the status register.
16
page (256 bytes) specified with addresses A
sequentially from the smallest address first, that page is auto-
matically written.
data0
data255
0
8
to A
to D
23
7
) for the
is input
RDY1