SH7261 Datasheet, PDF (239/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 9 Bus State Controller (BSC)
9.2 Input/Output Pins
Table 9.1 shows the pin configuration of the BSC.
Table 9.1 Pin Configuration
Name
A27 to A0
D31 to D0
CS6 to CS0
RD
WR3
WR2
WR1
I/O
Output
I/O
Output
Output
Output
Output
Output
WR0
BC3
BC2
BC1
Output
Output
Output
Output
BC0
Output
SDCS1, SDCS0
SDRAS
SDCAS
SDWE
Output
Output
Output
Output
Function
Address bus
Data bus
Chip select
Read pulse signal (read data output enable signal)
When accessing the 32-bit bus area, indicates that D31 to D24 are
being written to in byte-write mode.
When accessing the 32-bit bus area, indicates that D23 to D16 are
being written to in byte-write mode.
When accessing the 32-bit bus area, indicates that D15 to D8 are
being written to in byte-write mode.
When accessing the 16-bit bus area, indicates that D15 to D8 are
being written to in byte-write mode.
When accessing the 8-bit bus area, indicates that D7 to D0 are
being written to in byte-write mode.
When accessing the 32-bit bus area, indicates that D31 to D24 are
being accessed in byte-access mode.
When accessing the 32-bit bus area, indicates that D23 to D16 are
being written to in byte-write mode.
When accessing the 32-bit bus area, indicates that D15 to D8 are
being accessed in byte-access mode.
When accessing the 16-bit bus area, indicates that D15 to D8 are
being accessed in byte-access mode.
When accessing the 8-bit bus area, indicates that D7 to D0 are
being accessed in byte-access mode.
Connects to CS pin when SDRAM is connected.
Connects to RAS pin when SDRAM is connected.
Connects to CAS pin when SDRAM is connected.
Connects to WE pin when SDRAM is connected.
Rev. 2.00 Sep. 07, 2007 Page 207 of 1312
REJ09B0320-0200