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Rev. 5.00, 09/03, page 239 of 760
Bit 0—Area 6 Bus Type (A6PCM): Designates whether to access physical space area 6 as
PCMCIA space.
Bit 0: A6PCM Description
0 Physical space area 6 accessed as ordinary memory (Initial value)
1 Physical space area 6 accessed as PCMCIA space
10.2.2 Bus Control Register 2 (BCR2)
Bus control register 2 (BCR2) is a 16-bit readable/writable register that selects the bus size of each
area and whether an 8-bit port is used or not. It is initialized to H'3FF0 by a power-on reset, but is
not initialized by a manual reset or in standby mode. Do not access external memory outside area
0 until BCR2 register initialization is complete.
Bit: 15 14 13 12 11 10 9 8
— — A6SZ1 A6SZ0 A5SZ1 A5SZ0 A4SZ1 A4SZ0
Initial value:00111111
R/W: R R R/W R/W R/W R/W R/W R/W
Bit:76543210
A3SZ1A3SZ0A2SZ1A2SZ0————
Initial value:11110000
R/W:R/WR/WR/WR/WRRRR
Bits 15, 14, 3, 2, 1, and 0—Reserved: These bits are always read as 0. The write value should
always be 0.
Bits 2n + 1, 2n—Area n (2–6) Bus Size Specification (AnSZ1, AnSZ0): Specify the bus size of
physical space area n (n = 2 to 6).