SH7670 Datasheet, PDF (202/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 7 Bus State Controller (BSC)
7.4 Register Descriptions
The BSC has the following registers.
Do not access spaces other than area 0 until settings of the connected memory interface are
completed.
Table 7.4 Register Configuration
Register Name
Abbreviation R/W Initial Value Address
Access Size
Common control register
CS0 space bus control register
CS3 space bus control register
CS4 space bus control register
CS5 space bus control register
CS6 space bus control register
CMNCR
CS0BCR
CS3BCR
CS4BCR
CS5BCR
CS6BCR
R/W H'00001010 H'FFFC0000 32
R/W H'36DB0200*³ H'FFFC0004 32
R/W H'36DB0200*³ H'FFFC0010 32
R/W H'36DB0200*³ H'FFFC0014 32
R/W H'36DB0200*³ H'FFFC0018 32
R/W H'36DB0200*³ H'FFFC001C 32
CS0 space wait control register
CS0WCR
R/W H'00000500 H'FFFC0028 32
CS3 space wait control register
CS3WCR
R/W H'00000500 H'FFFC0034 32
CS4 space wait control register
CS4WCR
R/W H'00000500 H'FFFC0038 32
CS5 space wait control register
CS5WCR
R/W H'00000500 H'FFFC003C 32
CS6 space wait control register
CS6WCR
R/W H'00000500 H'FFFC0040 32
SDRAM control register
SDCR
R/W H'00000000 H'FFFC004C 32
Refresh timer control/status register RTCSR
R/W H'00000000 H'FFFC0050 32
Refresh timer counter
RTCNT
R/W H'00000000 H'FFFC0054 32
Refresh time constant register
AC characteristics switching
register
RTCOR
ACSWR
R/W H'00000000
R/W*¹ H'00000000
H'FFFC0058 32
H'FFFC180C 32
Internal bus master bus priority
register
IBMPR
R/W H'12300000 H'FFFC1818 32
AC characteristics switching key
register
ACKYER
W*² 
H'FFFC1BFC 8
Notes: 1. To write to this register, a special sequence using key registers for switching the AC
characteristics is required.
2. Write-only register. The write value is arbitrary.
3. This is an initial value when this LSI is started by the external pin (MD_BW) with the bus
width set to 8 bits. The initial value will be H'36DB0400 when the bus width is set to 16
bits.
Rev. 1.00 Nov. 14, 2007 Page 176 of 1262
REJ09B0437-0100