Memory; Sh7137 Internal Memory; Sram - Renesas M3A-HS37 User Manual

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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.
Part Number
M5M5256DFP-70GI
SCI0
Rev.1.00 Oct 09, 2008
REJ11J0021-0100
Table 2.3.1 SRAM Specifications
Bus size
8-bit
Figure 2.3.1 Connection Diagram Between SH7137 and SRAM
Table 2.3.2 Jumper Connections
SCI1 SRAM
Y N Y
N Y N
Note: Y = yes, N = no
Capacity
32 KB (bus width: 8-bit)
JP7 JP8 JP9
2-3 2-3 2-3
1-2 1-2 1-2
Functional Specifications
2.3 Memory
Package
28-pin SOP (450 mil)
JP10
2-3
1-2
2-4