Asynchronous-Sram Supporting Mcu Connection Mode; Figure 9.1 Connection Example Of 32-Bit External Mcu Interface; Figure 9.2 Connection Example Of 16-Bit External Mcu Interface - Renesas R-IN32M4-CL3 User Manual

R-IN32M4-CL3 User's Manual: Board design edition
9.1.1

Asynchronous-SRAM Supporting MCU Connection Mode

The following figure shows a general connection example in asynchronous-SRAM supporting MCU interface mode,
when this LSI chip is connected as a slave device to an external MCU.
Figure 9.1 Connection Example of 32-Bit External MCU Interface (in Asynchronous-SRAM Supporting MCU
Connection Mode)
R-IN32M4-CL3
Figure 9.2 Connection Example of 16-Bit External MCU Interface (in Asynchronous-SRAM Supporting MCU
Connection Mode)
HWRZ0-HWRZ3 and HBENZ0-HBENZ3 are multiplexed on the same pins, and the pin functions are
Notes 1.
selected by the level on the HWRZSEL pin.
Connecting the HERROUTZ signal is not indispensable.
2.
Connect it to an interrupt or general-purpose port input of the MCU to be connected, if required.
This is a chip-select signal supporting paged access. Connect it if required.
3.
Connected the address signal for a 4-byte boundary from the destination to the HA2 pin of the R-
4.
IN32M4-CL3.
Connected the address signal for a 2-byte boundary from the destination to the HA1 pin of the R-
5.
IN32M4-CL3.
R18UZ0074EJ0100
Dec 24, 2019
R-IN32M4-CL3
HBUSCLK
Note4
HA2-HA20
HD0-HD31
HCSZ
Note3
HPGCSZ
HRDZ
HWRSTBZ
Note1
HWRZ0 / HBENZ0
Note1
HWRZ1 / HBENZ1
Note1
HWRZ2 / HBENZ2
Note1
HWRZ3 / HBENZ3
HWAITZ
Note2
HERROUTZ
HBUSCLK
Note5
HA1-HA20
HD0-HD15
HCSZ
Note3
HPGCSZ
HRDZ
HWRSTBZ
Note1
HWRZ0 / HBENZ0
Note1
HWRZ1 / HBENZ1
HWAITZ
Note2
HERROUTZ
9. External MCU/Memory Interface Pins
External MCU
A2-A20
D0-D31
CSZ
PGCSZ
RDZ
WRSTBZ
(WRZ0) / BENZ0
(WRZ1) / BENZ1
(WRZ2) / BENZ2
(WRZ3) / BENZ3
WAITZ
Interrupt, port pin
External MCU
A1-A20
D0-D15
CSZ
PGCSZ
RDZ
WRSTBZ
(WRZ0) / BENZ0
(WRZ1) / BENZ1
WAITZ
Interrupt, port pin
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