HD6417751 Datasheet, PDF (359/1105 Pages) Renesas Technology Corp – SuperH RISC engine

Bit 31—Endian Flag (ENDIAN): Samples the value of the endian specification external pin
(MD5) in a power-on reset by means of the 5(6(7 pin. The endian mode of all spaces is
determined by this bit. ENDIAN is a read-only bit.
Bit 31: ENDIAN
0
1
Description
In a power-on reset, the endian setting external pin (MD5) is low,
designating big-endian mode for the SH7751 Series
In a power-on reset, the endian setting external pin (MD5) is high,
designating little-endian mode for the SH7751 Series
Bit 30—Master/Slave Flag (MASTER): Samples the value of the master/slave specification
external pin (MD7) in a power-on reset by means of the 5(6(7 pin. The master/slave status of all
spaces is determined by this bit. MASTER is a read-only bit.
Bit 30: MASTER
0
1
Description
In a power-on reset, the master/slave setting external pin (MD7) is high,
designating master mode for the SH7751 Series
In a power-on reset, the master/slave setting external pin (MD7) is low,
designating slave mode for the SH7751 Series
Bit 29—Area 0 Memory Type (A0MPX): Samples the value of the area 0 memory type
specification external pin (MD6) in a power-on reset by means of the 5(6(7 pin. The memory
type of area 0 is determined by this bit. A0MPX is a read-only bit.
Bit 29: A0MPX
0
1
Description
In a power-on reset, the external pin specifying the area 0 memory type
(MD6) is high, designating the area 0 as SRAM interface
In a power-on reset, the external pin specifying the area 0 memory type
(MD6) is low, designating the area 0 as MPX interface
Bits 28, 27, 23, 22, 18, and 1—Reserved: These bits are always read as 0, and the write value
should always be 0.
Bit 26—Data pin Pullup Resistor Control (DPUP): Controls the pullup resistance of the data
pins (D31 to D0). It is initialized at a power-on reset. The pins are not pulled up when access is
performed or when the bus is released, even if the ON setting is selected.
Bit 26: DPUP
0
1
Description
Sets pullup resistance of data pins (D31 to D0) ON
Sets pullup resistance of data pins (D31 to D0) OFF
(Initial value)
Rev. 3.0, 04/02, page 319 of 1064