HD6417751 Datasheet, PDF (47/1105 Pages) Renesas Technology Corp – SuperH RISC engine

Table 1.1 SH7751 Series Features (cont)
Item
Interrupt controller
(INTC)
Features
• Five independent external interrupts (NMI, IRL3 to IRL0)
• 15-level signed external interrupts: IRL3 to IRL0
• On-chip peripheral module interrupts: Priority level can be set for each
module
User break
controller (UBC)
• Supports debugging by means of user break interrupts
• Two break channels
• Address, data value, access type, and data size can all be set as break
conditions
• Supports sequential break function
Bus state
controller (BSC)
• Supports external memory access
 32/16/8-bit external data bus
• External memory space divided into seven areas, each of up to 64
Mbytes, with the following parameters settable for each area:
 Bus size (8, 16, or 32 bits)
 Number of wait cycles (hardware wait function also supported)
 Direct connection of DRAM, synchronous DRAM, and burst ROM
possible by setting space type
 Supports fast page mode and DRAM EDO
 Supports PCMCIA interface
 Chip select signals ($ to $) output for relevant areas
• DRAM/synchronous DRAM refresh functions
 Programmable refresh interval
 Supports CAS-before-RAS refresh mode and self-refresh mode
• DRAM/synchronous DRAM burst access function
• Big endian or little endian mode can be set
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