HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 233

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

This LSI has on-chip 128-kbyte U memory which can be used to store instructions or data.
7.1
• Page
• Memory map
Table 7.1
On the other hand, virtual addresses shown in table 7.1 are located in a part of area 1 in the
physical address space. When this memory is accessed from the physical address space, addresses
in which the upper three bits are 0 in addresses shown in table 7.1 are used.
• Ports
• Priority order
RAMS300B_000020030200
Page
Page 0 of U memory
Page 1 of U memory
There are two pages (pages 0 and 1).
The U memory is located in both the virtual address space and physical address space.
In the virtual address space, this memory is located in the addresses in P2/Uxy that are shown
in table 7.1. These addresses are included in space P2 (when SR.MD = 1) or Uxy (when
SR.MD = 0 and SR.DSP = 1) according to the CPU operating mode.
Each page has two independent read/write ports and is connected to the I bus or L bus. The L
bus is used when this memory is accessed from the virtual address space. The I bus is used
when this memory is accessed from the physical address space.
In the event of simultaneous accesses to the same page from different buses, the accesses are
processed according to the priority order. The priority order is: I bus > L bus.
Features
U Memory Virtual Addresses
Memory Size (128 kbytes in Total Two Pages)
H'A55F0000 to H'A55FFFFF
H'A5600000 to H'A560FFF
Section 7 U Memory
Rev. 1.00, 02/04, page 195 of 804