Renesas M3A-HS37 사용자 설명서

Functional Specifications 

2.3 Memory 

Rev.1.00 Oct 09, 2008 

2-4

REJ11J0021-0100 

 

 

 

2 

2.3 Memory 

 

2.3.1  SH7137 Internal Memory 

 

The SH7137 MCU is provided with a 256-KB flash memory and a 16-KB RAM. 

 

2.3.2 SRAM 

 

A 32-KB of SRAM can be mounted on the M3A-HS37 (optional). Both 5 V and 3.3 V can be supplied for the CPU and the 

SRAM on the M3A-HS37. The supply voltage supplied to the CPU is also supplied to SRAM. When M5M5256DFP-70GI is 

mounted as SRAM, the supply voltage is automatically the same as the CPU. The SRAM is controlled by the SH7137 on-chip 

bus state controller. 

Table 2.3.1 lists the SRAM specifications. Figure 2.3.1 shows the block diagram of the connection between the SH7137 and 

SRAM. Table 2.3.2 lists the jumper connections. 

 

Table 2.3.1 SRAM Specifications 

Part Number 

Bus size 

Capacity 

Package 

M5M5256DFP-70GI 

8-bit 

32 KB (bus width: 8-bit) 

28-pin SOP (450 mil) 

 

 

Figure 2.3.1 Connection Diagram Between SH7137 and SRAM 

 

Table 2.3.2 Jumper Connections 

SCI0 

SCI1 

SRAM

JP7 JP8 JP9 JP10 

Y  N  Y  2-3 2-3 2-3 2-3 

N  Y  N  1-2 1-2 1-2 1-2 

 

 

 

Note: Y = yes, N = no