SH7727 Datasheet, PDF (440/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 13 Li Bus State Controller (LBSC)
13.1.3 Bus Control Register 1 (BCR1)
Bus control register 1 (BCR1) is a 16-bit read/write register that sets the functions and bus cycle
state for each area. It is initialized to H'0000 by a power-on reset, but it is not initialized by a
manual reset or in standby mode. Do not access external memory except area 0 until BCR1
register initialization is complete.
Bit:
Initial value:
R/W:
15
PULA
0
R/W
14
PULD
0
R/W
13
12
11
10
9
8
HIZMEM HIZCNT ENDIAN A0BST1 A0BST0 A5BST1
0
0
0/1*
0
0
0
R/W
R/W
R
R/W
R/W
R/W
Bit: 7
6
5
4
3
2
1
0
A5BST0 A6BST1 A6BST0 DRAM DRAM DRAM A5PCM A6PCM
TP2
TP1
TP0
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Note: * Samples the value of the external pin (MD5) designating endian at power-on reset.
Bits 15 to 12—Not referenced
Bit 11—Endian Flag (ENDIAN): Samples a value at the external pin which designates endian
(MD5) at a power-on reset. Endian for all physical spaces is decided by this bit. This bit is read-
only.
Bit 11: ENDIAN
0
1
Description
At a reset, the endian setting external pin (MD5) is low, which indicates that
the SH7727 is set as big endian.
At a reset, the endian setting external pin (MD5) is high, which indicates that
the SH7727 is set as little endian.
Bits 10 to 5—Not referenced
Rev. 5.00 Dec 12, 2005 page 368 of 1034
REJ09B0254-0500