M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 50
M37702E6BFS
Manufacturer Part Number
M37702E6BFS
Description
EPROM MCU/8BIT CMOS EMULATION CH
Manufacturer
Renesas Electronics America
Datasheet
1.M37702E6BFS.pdf
(524 pages)
Specifications of M37702E6BFS
Accessory Type
Emulator EPROM MCU
For Use With/related Products
7702
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
M37702E6BFS
Manufacturer:
MITSUBISHI/三菱
Quantity:
20 000
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CENTRAL PROCESSING UNIT (CPU)
2.5 Processor modes
2–22
2.5.1 Single-chip mode
Use this mode when not using external devices. In this mode, ports P0 to P8 function as programmable
I/O ports (when using an internal peripheral device, they function as its I/O pins).
In the single-chip mode, only the internal area (SFR, internal RAM, and internal ROM) can be accessed.
2.5.2 Memory expansion and microprocessor modes
Use these modes when connecting devices externally. In these modes, an external device can be connected
to any required location in the 16-Mbyte access space. For access to external devices, refer to “Chapter
12. CONNECTION WITH EXTERNAL DEVICES.”
The memory expansion and microprocessor modes have the same functions except for the following:
•In the microprocessor mode, access to the internal ROM area is disabled by force, and the internal ROM
•In the microprocessor mode, port P4
In the memory expansion and microprocessor modes, P0 to P3, P4
width is 16 bits function as the I/O pins for the signals required for accessing external devices. Consequently,
these pins cannot be used as programmable I/O ports.
If an external device is connected with an area with which the internal area overlaps, when this overlapping
area is read, data in the internal area is taken in the CPU, but data in the external area is not taken in.
If data is written to an overlapping area, the data is written to the internal area, and a signal is output
externally at the same timing as writing to the internal area.
Figure 2.5.2 shows a pin configuration in each processor mode. Table 2.5.1 lists the functions of P0 to P4
in each processor mode.
For the function of each pin, refer to section “1.3 Pin description,” “Chapter 3. INPUT/OUTPUT PINS,”
each descriptions of internal peripheral devices and “Chapter 12. CONNECTION WITH EXTERNAL DEVICES.”
area is handled as an external area.
2
7702/7703 Group User’s Manual
always functions as the clock
0
, and P4
1
output pin.
1
when the external data bus
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