SH7261 datasheet(313/1348 Pages) RENESAS

313 / 1348 page

Section 9 Bus State Controller (BSC)

Rev. 2.00 Sep. 07, 2007 Page 281 of 1312

REJ09B0320-0200

Table 9.17

Case for 8-Bit External Data Bus Width (BSIZE*

= (1, 0))

SDRAM

Type

Number

64 Mbits (

×8)

128 Mbits (

×8)

256 Mbits (

×8)

512 Mbits (

×8)

DSZ*

001 (8 Mbytes)

010 (16 Mbytes)

011 (32 Mbytes)

100 (64 Mbytes)

DDBW*

00 (8 bits)

This LSI

address

Row

Address

Column

Address

Row

Address

Column

Address

Row

Address

Column

Address

Row

Address

Column

Address

A16 (/BA1)*

addr22*

addr23*

addr24*

addr25*

A15 (/BA0)*

addr21*

addr22*

addr23*

addr24*

A14 (/MA12)*

addr22*

addr23*

A13 (/MA11)*

addr20*

addr21*

addr22*

addr10*

A12 (/MA10)*

addr19*

addr20*

addr21*

A11 (/MA9)*

addr18*

addr19*

addr9*

addr19*

addr9*

addr20*

addr9*

A10 (/MA8)*

addr17*

addr8*

addr18*

addr8*

addr18*

addr8*

addr19*

addr8*

A9 (/MA7)*

addr16*

addr7*

addr17*

addr7*

addr17*

addr7*

addr18*

addr7*

A8 (/MA6)*

addr15*

addr6*

addr16*

addr6*

add16*

addr6*

addr17*

addr6*

A7 (/MA5)*

addr14*

addr5*

addr15*

addr5*

addr15*

addr5*

addr16*

addr5*

A6 (/MA4)*

addr13*

addr4*

addr14*

addr4*

addr14*

addr4*

addr15*

addr4*

A5 (/MA3)*

addr12*

addr3*

addr13*

addr3*

addr13*

addr3*

addr14*

addr3*

A4 (/MA2)*

addr11*

addr2*

addr12*

addr2*

addr12*

addr2*

addr13*

addr2*

A3 (/MA1)*

addr10*

addr1*

addr11*

addr1*

addr11*

addr1*

addr12*

addr1*

A2 (/MA0)*

addr9*

addr0*

addr10*

addr0*

addr10*

addr0*

addr11*

addr0*

Notes: 1. The legend BSIZE represents the BSIZE bit in the SDRAMCm control register.

2. The legend DSZ represents the DSZ bit in the SDRAMm address register.

3. The legend DDBW represents the DDBW bit in the SDRAMm address register.

4. The legends BA1, BA0, and MA12 to MA0 represent the SDRAM bank address and

SDRAM address respectively.

5. Addresses addr25 to addr0 are the logical addresses used by the CPU and DMAC in

access to the SDRAM.

6. When the RD, WR or PRA command is issued, this carries the pre-charge option

signal.

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