Operation; System Configuration - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
17.5

Operation

17.5.1

System Configuration

With this module, one or two serial flash memories can be directly connected per channel (data size of 1, 2, and 4 bits).
The number of connected memories can be selected using the BSZ[1:0] bits in CMNCR.
Examples of system configuration with one serial flash memory connected and two serial flash memories connected are
shown in Figure 17.2 and Figure 17.3, respectively.
This LSI
SPBMO0/SPBIO00
SPBMI0/SPBIO10
Figure 17.2 System Configuration Example with 4-Bit Data Size and One Serial Flash Memory Connected
(BSZ[1:0] Bits in CMNCR = 00)
This LSI
SPBMO0/SPBIO00
SPBMI0/SPBIO10
SPBMO1/SPBIO01
SPBMI1/SPBIO11
Figure 17.3 System Configuration Example with 4-Bit Data Size and Two Serial Flash Memories Connected
(BSZ[1:0] Bits in CMNCR = 01)
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
SPBSSL
SPBCLK
SPBIO20
SPBIO30
SPBSSL
SPBCLK
SPBIO20
SPBIO30
SPBIO21
SPBIO31
17. SPI Multi I/O Bus Controller
Serial flash memory
CS#
SCK
SI/IO0
SO/IO1
W#/IO2
HOLD#/IO3
Serial flash memory
CS#
SCK
SI/IO0
SO/IO1
W#/IO2
HOLD#/IO3
Serial flash memory
CS#
SCK
SI/IO0
SO/IO1
W#/IO2
HOLD#/IO3
17-31