HD6417705 Datasheet, PDF (49/739 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Item
Features
Bus state
controller (BSC)
• Physical address space is divided into eight areas: area 0, areas 2 to 4;
each a maximum of 64 Mbytes, and areas 5A, 5B, 6A, 6B; each a maximum
of 32 Mbytes
• The following features are settable for each area
Bus size (8, 16, or 32 bits). The supported bus size differs for each area.
Number of access wait cycles (Numbers of wait-state cycles during reading
and writing are independently selectable for some areas.)
Setting of idle wait cycles (for the same area or different area)
Specifying the memory type to be connected to each area enables direct
connection to SRAM, byte selection SRAM, SDRAM, and burst ROM. Some
areas support address/data multiplex I/O (MPX).
Outputs chip select signal (CS0, CS2 to CS4, CS5A/B, CS6A/B) for
corresponding area (Programs are used to select the CS assert/negate
timing.)
• SDRAM refresh function
Supports auto-refresh and self-refresh modes
• SDRAM burst access function
Different SDRAM can be connected to area 2 or area 3 (size/latency)
• Usable as either big or little endian machine
Direct memory • Four channels. Two of these channels support external requests.
access controller
(DMAC)
•
Burst mode and cycle steal mode
• Outputs transfer end signal in channel with DREQ (one channel)
• Supports intermittent mode (supports 16 or 64 cycles)
Clock pulse
• Clock mode: Input clock can be selected from external input (EXTAL or
generator (CPG)
CKIO) or crystal resonator
• Three types of clocks generated
CPU clock: max. 133.34 MHz/100 MHz
Bus clock: max. 66.67 MHz
Peripheral clock: max. 33.34 MHz
• Seven types of clock mode (selection of multiplication ratio of PLL1 and
PLL2, and selection external clock or crystal resonator)
Watchdog timer • One-channel watchdog timer
(WDT)
Power-down
mode
• Supports power-down mode
Sleep mode
Software standby mode and hardware standby mode
Module standby mode
Rev. 2.00, 09/03, page 3 of 690