M38503MXH Datasheet, PDF (59/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Page Read Command
This command reads the specified page (256 bytes) in the flash
memory sequentially one byte at a time. Execute the page read com-
mand as explained here following.
(1) Transfer the “FF16” command code with the 1st byte.
(2) Transfer addresses A8 to A15 and A16 to A23 (“0016”) with the 2nd
and 3rd bytes respectively.
(3) From the 4th byte onward, data (D0–D7) for the page (256 bytes)
specified with addresses A8 to A23 will be output sequentially
from the smallest address first in sync with the fall of the clock.
SCLK
RxD
TxD
SRDY1(BUSY)
FF16
A8 to A16 to
A15
A23
data0
data255
Fig. 57 Timing for page read
Read Status Register Command
This command reads status information. When the “7016” command
code is sent with the 1st byte, the contents of the status register
(SRD) specified with the 2nd byte and the contents of status register
1 (SRD1) specified with the 3rd byte are read.
Clear Status Register Command
This command clears the bits (SR4–SR5) which are set when the
status register operation ends in error. When the “5016” command
code is sent with the 1st byte, the aforementioned bits are cleared.
__________
When the clear status register operation ends, the SRDY1 (BUSY)
signal changes from the “H” to the “L” level.
SCLK
RxD
TxD
SRDY1(BUSY)
7016
SRD SRD1
output output
SCLK
RxD
TxD
SRDY1(BUSY)
5016
Fig. 58 Timing for reading the status register
Fig. 59 Timing for clearing the status register
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