m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 426
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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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Fig. 19.3.3 Example of handing control pins when control signals do not affect user system circuit
19.3.2. Example of handling control pins in flash memory serial I/O mode
Each of pins P2
memory serial I/O mode. Examples of handling these pins and pin RESET on the board are described
below.
(1) With control signals not affecting user system circuit
When control signals in the flash memory serial I/O mode are not used in the user system circuit, or
when these signals do not affect that circuit, the connections shown in Figure 19.3.3 are available.
When pins P4OUT
and 19.3.5.
Connected to
serial progra-
mmer.
4
: The flash memory version of the 7905 Group
to P2
CUT
6
, MD0, and MD1 serves as an input/output pin for a control signal in the flash
and P6OUT
Note: When there is a possibility that the user reset signal becomes “L” level in the flash memory serial I/O mode,
be sure to cut the current flow between the user reset pin and pin RESET by using a jumper switch, etc.
7905 Group User’s Manual Rev.1.0
CUT
, however, are used in the user system circuit, see Figures 19.3.4
User reset signal (Note)
FLASH MEMORY VERSION
User system board
19.3 Flash memory serial I/O mode
Not used, or Connected to the user system circuit
SCLK(P 2
MD1
R ESET
SDA(P2
BUSY(P 2
5
)
4
6
)
)
X
M37905F
IN
P4OUT
X
OUT
CUT
, P6OUT
MD0
V
V
CUT
SS
CC
19-23
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