M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 45
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
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M37702E6BFS
Manufacturer:
MITSUBISHI/三菱
Quantity:
20 000
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CENTRAL PROCESSING UNIT (CPU)
2.3 Access space
2.3.1 Banks
The access space is divided in units of 64 Kbytes. This unit is called “bank.” The high-order 8 bits of
address (24 bits) indicate a bank, which is specified by the program bank register (PG) or data bank
register (DT). Each bank can be accessed efficiently by using an addressing mode that uses the data bank
register (DT).
If the program counter (PC) overflows at a bank boundary, the contents of the program bank register (PG)
is incremented by 1. If a borrow occurs in the program counter (PC) as a result of subtraction, the contents
of the program bank register (PG) is decremented by 1. Normally, accordingly, the user can program
without concern for bank boundaries.
SFR (Special Function Register), internal RAM, and internal ROM are assigned in bank 0
. For details,
16
refer to section “2.4 Memory assignment.”
2.3.2 Direct page
A 256-byte space specified by the direct page register (DPR) is called “direct page.” A direct page is
specified by setting the base address (the lowest address) of the area to be specified as a direct page into
the direct page register (DPR).
By using a direct page addressing mode, a direct page can be accessed with less instruction cycles than
otherwise.
Note: Refer also to section “2.1 Central processing unit.”
7702/7703 Group User’s Manual
2–17
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