Renesas R5S72623 Manual Do Utilizador

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Section 4   Boot Mode 
 
R01UH0134EJ0400  Rev. 4.00  
 
Page 109 of 2108 
Sep 24, 2014 
 
 
 
SH7262 Group, SH7264 Group 
Section 4   Boot Mode 
This LSI can be booted from the memory connected to the CS0 space, the NAND flash memory, 
and the serial flash memory. 
4.1
 
Features 
  Four boot modes 
Boot mode 0: Boots the LSI from the memory connected to the CS0 space 
Boot mode 1: Boots the LSI from the serial flash memory (high-speed communication) 
Boot mode 2: Boots the LSI from the NAND flash memory 
Boot mode 3: Boots the LSI from the serial flash memory (low-speed communication) 
 
4.2
 
Boot Mode and Pin Function Setting 
This LSI can determine the boot mode using external pins when 
RES is low. The external pin 
settings for selecting the boot mode are shown in table 4.1. 
Table 4.1 
External Pin (MD_BOOT1 and MD_BOOT0) Settings and Corresponding Boot 
Modes 
MD_BOOT1 MD_BOOT0 Boot 
Mode 
Boots the LSI from the memory connected to the CS0 
space (boot mode 0). 
Boots the LSI, through high-speed communication, from the 
serial flash memory connected to channel 0 of the Renesas 
serial peripheral interface (boot mode 1). 
Boots the LSI from the NAND flash memory connected to 
the NAND flash memory controller (boot mode 2). 
Boots the LSI, through low-speed communication, from the 
serial flash memory connected to channel 0 of the Renesas 
serial peripheral interface (boot mode 3).