Renesas R-IN32M3 Series User Manual page 39

R-IN32M3-EC User's Manual
The combinations of available operating mode setting pins in this product are as follows.
Boot Mode External Memory Boot
External Memory Slave Memory
Interface
MEMC Type
Asynchronous
External Bus
Width
16-bit 32-bit 16-bit 32-bit
BOOT1-0 00
MEMIFSEL 0
MEMCSEL 0
BUS32EN 0
HIFSYNC 0
HWRZSEL 0
ADMUXMODE 0
Caution: Any combination of operating mode setting pins other than the above is prohibited.
Notes 1. The mode of the external MCU interface is selectable by the level on the HIFSYNC pin.
HIFSYNC = 0: Asynchronous SRAM interface mode
HIFSYNC = 1: Synchronous SRAM interface mode
For details, see section 11, External MCU Interface, in the R-IN32M3 Series User's Manual
(Peripheral Modules).
2. The external MCU interface HWRZ or HBENZ is selectable by the level on the HWRZSEL pin.
For details, see section 2.1.3.1, External MCU Interface Pins.
Remarks 1. The combination of operating-mode setting pins used to select booting for instruction
RAM (BOOT1-0 = 11) is the same as that for booting from external memory (BOOT1-0 = 00).
2. Asynchronous: Asynchronous SRAM memory controller (MEMCSEL = 0)
Synchronous: Synchronous burst access memory controller (MEMCSEL = 1)
R18UZ0003EJ0501
Jan. 12, 2021
External MCU Boot
Interface External MCU Interface
Synchronous Asynchronous
16-bit 32-bit
00 00 00 10 10
0 0 0 1 1
0 1 1 0 0
1 0 1 0 1
Note1 Note1
0 0 0
Note2 Note2
0 0 0
0 1 1 0 0
External Serial Flash ROM Boot
Slave Memory Interface
Synchronous Asynchronous
16-bit 32-bit 16-bit 32-bit
10 10 01 01
1 1 0 0
1 1 0 0
0 1 0 1
1 1 0 0
0 0 0 0
1 1 0 0
2. Pin Functions
External MCU Interface
Synchronous Asynchronous
16-bit 32-bit 16-bit 32-bit
01 01 01 01
0 0 1 1
1 1 0 0
0 1 0 1
Note1 Note1
0 0
Note2 Note2
0 0
1 1 0 0
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Synchronous
16-bit 32-bit
01 01
1 1
1 1
0 1
1 1
0 0
1 1