r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 687

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

The DDR-SDRAM space in this LSI and internal registers of this LSI can be accessed by a CPU
externally connected to the LSI (hereinafter, simply referred to as “external CPU”). Access by an
external CPU is implemented using the MPX protocol.
15.1
• Control of access from an external CPU
Figure 15.1 shows a block diagram of the EXCPU.
An external CPU is able to access the DDR-SDRAM space and internal registers of this LSI.
The MPX protocol is used for access from an external CPU.
The SH7750 Group and the SH7751 Group can be connected as the external CPU via the buses
of the SH7750 Group and the SH7751 Group.
Features
Section 15 External CPU Interface (EXCPU)
SuperHyway bus
Figure 15.1 EXCPU Block Diagram
External CPU interface (EXCPU)
controller
Registers
interface
External CPU
controller
interface
Section 15 External CPU Interface (EXCPU)
Rev. 1.00 Oct. 01, 2007 Page 621 of 1956
EX_CS0
EX_CS1
EX_RDWR
EX_FRAME
EX_AD31 to
EX_AD0
EX_SIZE2 to
EX_SIZE0
EX_RDY
EX_INT
REJ09B0256-0100