SH7763 Datasheet, PDF (403/2026 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 11 Local Bus State Controller (LBSC)
Initial
Bit
Bit Name Value
R/W
31
ENDIAN Undefined R
30 to 27 
All 0
R
26
DPUP
0
R/W
25

0
R
Description
Endian Flag
The value of the external pin (MD5) designating the
endian mode is sampled at a power-on reset by the
PRESET pin. This bit determines the endian mode of all
spaces.
0: Indicates that the external pin (MD5) designating the
endian mode is low at a power-on reset and big-
endian mode is specified for this LSI.
1: Indicates that the external pin (MD5) designating the
endian mode is high at a power-on reset and little-
endian mode is specified for this LSI.
Reserved
These bits are always read as 0. The write value should
always be 0.
Data Pin Pull-Up Resistor Control
Specifies the pull-up resistor state of the data pins (D31
to D0). This bit is initialized by a power-on reset. The
pins are not pulled up when access is performed or
when the bus is released, even if the pull-up resistor is
on. Also, in standby mode, pins D31 to D16 are not
pulled up regardless of the setting.
0: Cycles in which the pull-up resistors of the data pins
(D31 to D0) are turned on are inserted before and
after a memory access.*
1: Pull-up resistor is off for data pins (D31 to D0).
Note: * We recommend that a pull-up resistor be
externally connected to the data pins if it is
required.
Reserved
This bit is always read as 0. The write value should
always be 0.
Rev. 1.00 Oct. 01, 2007 Page 337 of 1956
REJ09B0256-0100