3
Table 1.1
SH7709S Features (cont)
Item
Features
Cache memory
•
16-kbyte cache, mixed instruction/data
•
256 entries, 4-way set associative, 16-byte block length
•
Write-back, write-through, LRU replacement algorithm
•
1-stage write-back buffer
•
Maximum 2 ways of the cache can be locked
Interrupt
controller (INTC)
•
23 external interrupt pins (NMI, IRQ5–IRQ0, PINT15 to PINT0)
•
On-chip peripheral interrupts: set priority levels for each module
User break
controller (UBC)
•
2 break channels
•
Addresses, data values, type of access, and data size can all be set as break
conditions
•
Supports a sequential break function
Bus state
controller (BSC)
•
Physical address space divided into six areas (area 0, areas 2 to 6), each a
maximum of 64 Mbytes, with the following features settable for each area:
Bus size (8, 16, or 32 bits)
Number of wait cycles (also supports a hardware wait function)
Setting the type of space enables direct connection to SRAM,
Synchronous DRAM, and burst ROM
Supports PCMCIA interface (2 channels)
Outputs chip select signal (CS0, CS2–CS6) for corresponding area
•
Synchronous DRAM refresh function
Programmable refresh interval
Support self-refresh mode
•
Synchronous DRAM burst access function
•
Usable as either big or little endian machine
Hitachi user-
debugging
Interface (H-UDI)
•
E10A emulator support
•
JTAG-standard pin assignment
•
Realtime branch address trace
•
1-kB on-chip RAM for fast emulation program execution
Timer (TMU)
•
3-channel auto-reload-type 32-bit timer
•
Input capture function
•
6 types of counter input clocks can be selected
•
Maximum resolution: 2 MHz
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
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