Section 9 L Memory
Rev.1.00 Dec. 13, 2005 Page 227 of 1286
REJ09B0158-0100
Section 9 L Memory
This LSI includes on-chip L-memory which stores instructions or data.
9.1 Features
•
Capacity
•
Total L memory capacity is 16 Kbytes.
The L memory is divided into two pages (pages 0 and 1).
•
Memory map
The L memory is allocated in the addresses shown in table 9.1 in both the virtual address space
and the physical address space.
Table 9.1
L Memory Addresses
Memory Size (Two Pages Total)
Page 16
Kbytes
Page 0 of L memory
H'E500E000 to H'E500FFFF
Page 1 of L memory
H'E5010000 to H'E5011FFF
•
Ports
Each page has three independent read/write ports and is connected to each bus. The instruction
bus is used when L memory is accessed through instruction fetch. The operand bus is used
when L memory is accessed through operand access. The SuperHyway bus is used for L
memory access from the SuperHyway bus master module.
•
Priority
In the event of simultaneous accesses to the same page from different buses, the access
requests are processed according to priority. The priority order is: SuperHyway bus > operand
bus > instruction bus.
Содержание SH7780 Series
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