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3 memory, 1 sh7137 internal memory, 2 sram – Renesas M3A-HS37 User Manual

Page 20

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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

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