SH7750_08 Datasheet, PDF (442/1162 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 13 Bus State Controller (BSC)
⎯ 8-CAS byte control for power-down operation
⎯ DRAM control signal timing can be controlled by register settings
⎯ Consecutive accesses to the same row address
Connectable areas: 2, 3
Settable bus widths: 64, 32, 16
• Synchronous DRAM interface
⎯ Row address/column address multiplexing according to synchronous DRAM capacity
⎯ Burst operation
⎯ Auto-refresh and self-refresh
⎯ Synchronous DRAM control signal timing can be controlled by register settings
⎯ Consecutive accesses to the same row address
Connectable areas: 2, 3
Settable bus widths: 64, 32
• Burst ROM interface
⎯ Wait state insertion can be controlled by program
⎯ Burst operation, executing the number of transfers set in a register
Connectable areas: 0, 5, 6
Settable bus widths: 64*, 32, 16, 8
• MPX interface
⎯ Address/data multiplexing
Connectable areas: 0 to 6
Settable bus widths: 64, 32
• Byte control SRAM interface
⎯ SRAM interface with byte control
Connectable areas: 1, 4
Settable bus widths: 64, 32, 16
• PCMCIA interface
⎯ Wait state insertion can be controlled by program
⎯ Bus sizing function for I/O bus width
• Fine refreshing control
⎯ Supports refresh operation immediately after self-refresh operation in low-power DRAM
by means of refresh counter overflow interrupt function
• Refresh counter can be used as interval timer
⎯ Interrupt request generated by compare-match
⎯ Interrupt request generated by refresh counter overflow
Rev.7.00 Oct. 10, 2008 Page 358 of 1074
REJ09B0366-0700