m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 405
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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the former includes the flash memory. Note that, however, part of the SFR area of the flash memory version
differs from that of the mask ROM version. (Refer to section “19.1.1 Memory assignment.”) Also, the stop
mode terminate operation of the flash memory version differs from that of the mask ROM version. (Refer
to section “19.1.2 Single-chip mode.”)
modes: flash memory CPU reprogramming mode, flash memory serial I/O mode, and flash memory parallel
I/O mode.
19.1.1, see Table 1.1.1.)
FLASH MEMORY VERSION
19.1 Overview
19.1 Overview
The flash memory version is provided with the same function as that of the mask ROM version except that
In the flash memory version, its internal flash memory can be handled in the following three reprogramming
Table 19.1.1 lists the performance overview of the flash memory version. (For the items not listed in Table
19-2
Table 19.1.1 Performance overview of flash memory version
For the flash memory version, in addition to the same single-chip mode as that of the mask ROM version,
any of the operating modes listed in Table 19.1.2 can further be selected by the voltage levels applied to
pins MD1 and MD0. Table 19.1.3 also lists the overview of flash memory reprogramming modes.
Note: Do not switch the voltages applied to pins MD0 and MD1 while the microcomputer is active.
Power source voltage
Programming/Erase voltage
Flash memory reprogramming modes
Programming
Erase method
Maximum number of reprograms (programming
and erasure)
CPU reprogramming mode,
Flash memory serial I/O mode
Flash memory Parallel I/O mode
Item
7905 Group User’s Manual Rev.1.0
5 V ± 0.5 V
5 V ± 0.5 V
Flash memory CPU reprogramming mode,
Flash memory serial I/O mode,
Flash memory parallel I/O mode
Programmed in a unit of word
Programmed in a unit of byte
Block erase or Total erase
100
Table 19.1.2 Operating mode selection according to
Notes 1: Do not select.
V
V
V
V
SS
SS
CC
CC
MD1
2: Refer to section “19.1.3 Boot mode.”
3: Refer to section “19.4 Flash memory parallel
I/O mode.”
V
V
V
V
SS
CC
SS
CC
MD0
voltages applied to pins MD0 and MD1
Performance
Single-chip mode
– (Note 1)
Boot mode (Note 2)
Flash memory parallel I/O mode
(Note 3)
Operating modes
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