r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 69
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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2.3
Some control registers are mapped to the following memory areas. Each of the mapped registers
has two addresses.
H'1C00 0000 to H'1FFF FFFF
H'FC00 0000 to H'FFFF FFFF
These two areas are used as follows.
• H'1C00 0000 to H'1FFF FFFF
• H'FC00 0000 to H'FFFF FFFF
Note: Do not access addresses to which registers are not mapped in either area. The operation of
This area must be accessed using the address translation function of the MMU.
Setting the page number of this area to the corresponding field of the TLB enables access to a
memory-mapped register.
The operation of an access to this area without using the address translation function of the
MMU is not guaranteed.
Access to area H'FC00 0000 to H'FFFF FFFF in user mode will cause an address error.
Memory-mapped registers can be referenced in user mode by means of access that involves
address translation.
an access to an address with no register mapped is undefined. Also, memory-mapped
registers must be accessed using a fixed data size. The operation of an access using an
invalid data size is undefined.
Memory-Mapped Registers
Rev.1.00 Jan. 10, 2008 Page 39 of 1658
2. Programming Model
REJ09B0261-0100
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