Renesas R5S72621 Manual Do Utilizador

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Section 26   USB 2.0 Host/Function Module 
Page 1370 of 2108 
 
R01UH0134EJ0400  Rev. 4.00 
 
 Sep 
24, 
2014 
SH7262 Group, SH7264 Group
Bit Bit 
Name 
Initial 
Value R/W Description 
11, 10 
MBW[1:0] 
00 
R/W 
CFIFO Port Access Bit Width 
Specifies the bit width for accessing the CFIFO port. 
00: 8-bit width 
01: 16-bit width 
10: 32-bit width 
11: Setting prohibited 
Once reading data is started after setting these bits, 
these bits should not be modified until all the data has 
been read.  
When the selected pipe is in the receiving direction, 
these bits should be set in the following timing: 
  Set the CURPIPE and MBW bits simultaneously. 
  When the DCP is selected (CURPIPE = B'000), 
set the ISEL and MBW bits simultaneously. 
For details, see section 26.4.4, FIFO Buffer Memory. 
When the selected pipe is in the transmitting 
direction, the bit width cannot be changed from the 8-
bit width to the 16-/32-bit width or from the 16-bit 
width to the 32-bit width while data is being written to 
the buffer memory. 
 0 
Reserved 
This bit is always read as 0. The write value should 
always be 0. 
BIGEND 
R/W 
CFIFO Port Endian Control 
Specifies the byte endian for the CFIFO port. 
0: Little endian 
1: Big endian 
7, 6 
 All 
Reserved 
These bits are always read as 0. The write value 
should always be 0.