Renesas R5S72647 User Manual

 

 

 

 

 

Section 9   Bus State Controller 

 

R01UH0134EJ0400  Rev. 4.00  

 

Page 233 of 2108 

Sep 24, 2014 

 

 

 
SH7262 Group, SH7264 Group 

WE0/DQML Output 

Indicates 

that 

D7 to D0 are being written to. 

Connected to the byte select signal when a SRAM with byte 
selection is connected. 

Functions as the select signals for D7 to D0 when SDRAM 
is connected. 

RAS Output 

Connects 

to 

RAS pin when SDRAM is connected. 

CAS Output 

Connects 

to 

CAS pin when SDRAM is connected. 

CKE 

Output 

Connects to CKE pin when SDRAM is connected. 

WAIT 

Input 

External wait input 

BREQ 

Input 

Bus request input  

BACK 

Output 

Bus enable output  

IOIS16 

Input 

Indicates 16-bit I/O of PCMIA. 

Enabled only in little endian mode. The pin should be driven 
low in big endian mode.