Asynchronous Sram Interface Mode; Figure 11.1 Connection Example Of 32-Bit External Mcu Interface (Asynchronous Sram Interface Mode); Figure 11.2 Connection Example Of 16-Bit External Mcu Interface (Asynchronous Sram Interface Mode) - Renesas R-IN32M3 Series User Manual

R-IN32M3 Series: Board design edition
11.1.1

Asynchronous SRAM Interface Mode

The following figure shows a general connection example in asynchronous SRAM interface mode, when this LSI chip is
connected as a slave device to an external MCU.

Figure 11.1 Connection Example of 32-Bit External MCU Interface (Asynchronous SRAM Interface Mode)

Figure 11.2 Connection Example of 16-Bit External MCU Interface (Asynchronous SRAM Interface Mode)

Notes 1. The details of signal connection depend on the bus interface specification of the host MCU.
Confirm the product specification of MCU which is connected to this LSI.
2. HWRZ0-HWRZ3 and HBENZ0-HBENZ3 are multiplexed on the same pins, and the pin
functions are selected by the level on the HWRZSEL pin.
3. Connecting the HERROUTZ signal is not indispensable. Connect it to an interrupt or
general-purpose port input of the MCU to be connected, if required.
R18UZ0021EJ0400
Dec. 28, 2018
R-IN32M3
HBUSCLK
Note5
HA2-HA20
HD0-HD31
HCS Z
Note4
HPGCSZ
HRDZ
HWRS TBZ
HWRZ0 / HBENZ0
HWRZ1 / HBENZ1
HWRZ2 / HBENZ2
HWRZ3 / HBENZ3
HWAITZ
Note3
HERRO UTZ
R-IN32M3
HBUSCLK
Note6
HA1-HA20
HD0-HD15
HCS Z
HPGCSZ
HRDZ
HWRS TBZ
HWRZ0 / HBENZ0
HWRZ1 / HBENZ1
HWAITZ
Note3
HERRO UTZ
11. External MCU/Memory Interface Pins
External MCU
A2-A20
D0-D31
CSZ
PGCSZ
RDZ
WRSTB Z
(WRZ0) / BENZ0
(WRZ1) / BENZ1
(WRZ2) / BENZ2
(WRZ3) / BENZ3
WAITZ
Inte rrupt, port pin
External MCU
A1-A20
D0-D15
CSZ
Note4
PGCSZ
RDZ
WRSTB Z
(WRZ0) / BENZ0
(WRZ1) / BENZ1
WAITZ
Inte rrupt, port pin
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