HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 114
HD6412240
Manufacturer Part Number
HD6412240
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412240.pdf
(818 pages)
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Section 3 MCU Operating Modes
The external expansion modes allow switching between 8-bit and 16-bit bus modes. After program
execution starts, an 8-bit or 16-bit address space can be set for each area, depending on the bus
controller setting. If 16-bit access is selected for any one area, 16-bit bus mode is set; if 8-bit
access is selected for all areas, 8-bit bus mode is set.
Note that the functions of each pin depend on the operating mode.
The H8S/2245 Group can be used only in modes 1 to 7. This means that the mode pins must be set
to select one of these modes. Do not change the inputs at the mode pins during operation.
3.1.2
The H8S/2245 Group has a mode control register (MDCR) that indicates the inputs at the mode
pins (MD
H8S/2245 Group. Table 3.2 summarizes these registers.
Table 3.2
Name
Mode control register
System control register
Note:
Rev.3.00 Mar. 26, 2007 Page 72 of 772
REJ09B0355-0300
* Lower 16 bits of the address.
2
Register Configuration
to MD
Register Configuration
0
), and a system control register (SYSCR) that controls the operation of the
Abbreviation
MDCR
SYSCR
R/W
R/W
R
Initial Value
Undetermined
H'01
Address*
H'FF3B
H'FF39
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