11. Local Bus State Controller (LBSC)
Rev.1.00 Jan. 10, 2008 Page 367 of 1658
REJ09B0261-0100
11.4.2 Bus Control Register (BCR) BCR is a 32-bit readable/writable register that specifies the function, bus cycle state, etc for each area. BCR is initialized to H'0000 0000 in big endian mode and to H'8000 0000 in little endian mode by a power-on reset, however, not initialized by a manual reset.
161718192021222324252627282931 30
00000000000000x*x*
DMA
BST
BREQ
EN
DACKBST[3:0]OPUPDPUP
END
IAN MAS
TER
R/WR/WRRR/WR/WR/WR/WR/WRR/WRRRRR
BIt:
Initial value:
R/W:
01234567891011121315 14
0000000000000000
ASYNC[6:0]HIZ
CNT
R/WR/WR/WR/WR/WR/WR/WRRRRRRRR R/W
BIt:
Initial value:
R/W:
Note: * The initial values of bits 31 and 30 depend on the states of the external pins MODE8 and MODE9, respectively.
Bit Bit Name
Initial
Value R/W Description
31 ENDIAN x R Endian Flag
The value on the external pin (MODE8) that sets the
endian mode is sampled and reflected in this bit at a
power-on reset by the PRESET pin. This bit determines
the endian for all spaces.
0: Indicates that a low level is on the MODE8 pin at a
power-on reset and the LSI has been configured for
big endian.
1: Indicates that a high level is on the MODE8 pin at a
power-on reset and the LSI has been configured for
little endian.
30 MASTER x R Master/Slave Flag
The value on the external pin (MODE9) that sets
master/slave is sampled and reflected in this bit at a
power-on reset by the PRESET pin. This bit specifies
master/slave for all spaces.
0: Indicates that a high level is on the MODE9 and the
LSI has been configured as master.
1: Indicates that a high level is on the MODE9 and the
LSI has been configured as slave.
29 to 27 All 0 R Reserved
These bits are always read as 0. The write value should
always be 0.