m37753ffchp Mitsumi Electronics, Corp., m37753ffchp Datasheet - Page 26

• Manufacturer Part Number: m37753ffchp
• Description: Single Chip 16 Bit Cmos Microcomputer Flash Memory Version
• Manufacturer: Mitsumi Electronics, Corp.

Functional outline (Serial I/O mode)
In the serial I/O mode, data is transferred synchronously with the
clock using serial input/output. The input data is read from the SDA
pin into the internal circuit synchronously with the rising edge of the
serial clock pulse; the output data is output from the SDA pin syn-
chronously with the falling edge of the serial clock pulse. Data is
Table 4. Software command (Serial I/O mode)
Fig. 15 Timings during bank select
26
Bank select command
This is the command which specifies the bank of the flash memory,
which is to be read/programmed, before executing the read com-
mand or the program command (and the program verify command).
There are the bank 0 select command (command code “E0
which selects bank 0 (addresses 00000
1 select command (command code “E1
(addresses 10000
When any bank select command is input once, specified bank is
Command
Bank 0 select
Bank 1 select
Read
Program
Program verify
Auto erase
Error check
Number of transfers
BUSY
SCLK
SDA
OE
16
to 1FFFF
Bank 0 select command
First command
16
code input
).
Command code input (E0
“H”
“L”
E0
C0
E1
00
40
30
80
0 0 0 0 0 1 1 1
16
16
16
16
16
16
16
16
16
to 0FFFF
”), which selects bank 1
Read address L (Input)
Program address L (Input)
Verify data (Output)
30
Error code (Output)
16
SHINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION
16
(Input)
), and the bank
t
16
CH
)
—————
—————
Second
16
”),
transferred in units of eight bits.
In the first transfer, the user inputs the command code. This is fol-
lowed by address input and data input/output according to the con-
tents of the command. Table 4 shows the software commands used
in the serial I/O mode. The following explains each software com-
mand.
valid until the next bank select command is input. Accordingly, when
the read command or the program command (and the program verify
command) is executed to plural bytes in the same bank, if any bank
select command is input first, it is unnecessary to input the bank se-
lect command again for the following bytes. When selecting the se-
rial I/O mode (before bank command input), bank 0 is selected.
Note: Bank select command does not affect the auto erase com-
Read address H (Input)
Program address H (Input)
BUSY
SCLK
mand, that is to say, when executing the auto erase com-
mand, all flash memory is erased collectively regardless of
specified bank.
And in the same way, the bank select command does not af-
fect the error check command.
SDA
OE
—————
—————
—————
—————
—————
Bank 1 select command
Third
MITSUBISHI MICROCOMPUTERS
Command code input (E1
“H”
“L”
1 0 0 0 0 1 1 1
M37753FFCHP
Read data (Output)
Program data (Input)
M37753FFCFP
t
16
CH
—————
—————
—————
—————
—————
)
Fourth