HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 218

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Notes: 1. Samples the value of the external pin (MD5) designating endian at power-on reset.
8.4.2
The bus control register 2 (BCR2) is a 16-bit read/write register that selects the bus-size width and
8-bit port of each area. It is initialized to H'3FF0 by a power-on reset, but is not initialized by a
manual reset or by standby mode. Do not access external memory outside area 0 until BCR2
register initialization is complete.
Rev. 4.00, 03/04, page 172 of 660
Bit
1
0
Bit
15, 14
13
12
2. When selecting this mode, set the same bus width for areas 2 and 3.
3. Do not access to the SRAM when the clock ratio is I
Bit Name
A5PCM
A6PCM
Bit Name
—
A6SZ1
A6SZ0
Bus Control Register 2 (BCR2)
Initial Value R/W
0
0
Initial Value R/W
All 0
1
1
R/W
R/W
R
R/W
R/W
Designates whether to access physical space area 5
as PCMCIA space.
0: Access physical space area 5 as ordinary memory
1: Access physical space area 5 as PCMCIA space
Designates whether to access physical space area 6
as PCMCIA space.
0: Access physical space area 6 as ordinary memory
1: Access physical space area 6 as PCMCIA space
Reserved
These bits are always read as 0. The write value
should always be 0.
Area 6 Bus Size Specification
Specify the bus sizes of physical space area 6.
00: Reserved (Setting prohibited)
01: Byte (8-bit) size
10: Word (16-bit) size
11: Longword (32-bit) size
00: Reserved (Setting prohibited)
01: Byte (8-bit) size
10: Word (16-bit) size
11: Reserved (Setting prohibited)
Description
Area 5 Bus Type
Area 6 Bus Type
Description
When port A/B is unused.
When port A/B is used.
: B
= 1:1.