HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 229

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

This LSI has on-chip 8 kbytes of X-memory and Y-memory that can be used to store instructions
or data.
6.1
• Page
• Memory map
Table 6.1
On the other hand, virtual addresses shown in table 6.1 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 6.1 are used.
• Ports
• Priority order
XYM0010A_000020030200
Page
Page 0 of X memory
Page 1 of X memory
Page 0 of Y memory
Page 1 of Y memory
There are four pages. The X memory is divided into two pages (pages 0 and 1) and the Y
memory is divided into two pages (pages 0 and 1).
The X/Y memory is located in the virtual address space, physical address space.
In the virtual address space, this memory is located in the addresses in P2/Uxy that are shown
in table 6.1. 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 three independent read/write ports and is connected to each bus. The X memory
is connected to the I bus, X bus, and L bus. The Y memory is connected to the I bus, Y bus,
and L bus. The L bus, X bus, and Y bus are 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 > X bus > L bus in the X
memory and I bus > Y bus > L bus in the Y memory.
Features
X/Y Memory Virtual Addresses
Section 6 X/Y Memory
Memory Size (16 kbytes in Total Four Pages)
H'A5007000 to H'A5007FFF
H'A5008000 to H'A5008FFF
H'A5017000 to H'A5017FFF
H'A5018000 to H'A5018FFF
Rev. 1.00, 02/04, page 191 of 804