SH7672 datasheet(202/1292 Pages) RENESAS

202 / 1292 page

Section 7

Bus State Controller (BSC)

Rev. 1.00 Nov. 14, 2007 Page 176 of 1262

REJ09B0437-0100

7.4

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

Abbreviation

R/W

Initial Value

Address

Access Size

Common control register

CMNCR

R/W

H'00001010

H'FFFC0000

CS0 space bus control register

CS0BCR

R/W

H'36DB0200*

H'FFFC0004

CS3 space bus control register

CS3BCR

R/W

H'36DB0200*

H'FFFC0010

CS4 space bus control register

CS4BCR

R/W

H'36DB0200*

H'FFFC0014

CS5 space bus control register

CS5BCR

R/W

H'36DB0200*

H'FFFC0018

CS6 space bus control register

CS6BCR

R/W

H'36DB0200*

H'FFFC001C

CS0 space wait control register

CS0WCR

R/W

H'00000500

H'FFFC0028

CS3 space wait control register

CS3WCR

R/W

H'00000500

H'FFFC0034

CS4 space wait control register

CS4WCR

R/W

H'00000500

H'FFFC0038

CS5 space wait control register

CS5WCR

R/W

H'00000500

H'FFFC003C

CS6 space wait control register

CS6WCR

R/W

H'00000500

H'FFFC0040

SDRAM control register

SDCR

R/W

H'00000000

H'FFFC004C

Refresh timer control/status register RTCSR

R/W

H'00000000

H'FFFC0050

Refresh timer counter

RTCNT

R/W

H'00000000

H'FFFC0054

Refresh time constant register

RTCOR

R/W

H'00000000

H'FFFC0058

AC characteristics switching

ACSWR

R/W*

H'00000000

H'FFFC180C

Internal bus master bus priority

IBMPR

R/W

H'12300000

H'FFFC1818

AC characteristics switching key

ACKYER



H'FFFC1BFC

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.

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