R-IN32M4-CL3 User's Manual: Board design edition
9. External MCU/Memory Interface Pins
R18UZ0074EJ0100
Page 36 of 61
Dec 24, 2019
9.1.3
Synchronous-Burst-Transfer Supporting MCU Connection Mode
The following figure shows a general connection example in synchronous-burst-transfer supporting MCU connection
mode, when this LSI chip is connected as a slave device to an external MCU.
9.1.3.1
Address/Data Multiplexed Mode (ADMUXMODE = H)
R-IN32M4-CL3
External MCU
D0-D31
CSZ
HBCYSTZ
HD0-HD31
BCYSTZ / ADV
RDZ
HCSZ
HRDZ
WAITZ
HWAITZ
WRSTBZ
HWRSTBZ
Interrupt, port pin
HERROUTZ
Note2
HBUSCLK
HWRZ0 / HBENZ0
BENZ0
BENZ1
BENZ2
BENZ3
HWRZ1 / HBENZ1
HWRZ2 / HBENZ2
HWRZ3 / HBENZ3
BUSCLK
HWRZSEL
Note1
ADMUXMODE
HPGCSZ
PGCSZ
VDD33 (3.3V)
Figure 9.5 Connection Example of 32-Bit External MCU Interface
R-IN32M4-CL3
External MCU
D0-D15
CSZ
HBCYSTZ
HD0-HD15
BCYSTZ / ADV
RDZ
HCSZ
HRDZ
WAITZ
HWAITZ
WRSTBZ
HWRSTBZ
Interrupt, port pin
HERROUTZ
Note2
HWRZ0 / HBENZ0
BENZ0
BENZ1
HWRZ1 / HBENZ1
HBUSCLK
BUSCLK
A17-A20
Note4
HA17-HA20
Note3
HWRZSEL
Note1
ADMUXMODE
HPGCSZ
PGCSZ
VDD33 (3.3V)
Figure 9.6 Connection Example of 16-Bit External MCU Interface