SH7041A datasheet(708/923 Pages) RENESAS

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Table 21.1

Operating Modes and ROM

Mode Setting Pin

Operating Mode

MD3 MD2 MD1 MD0 Area 0

Mode 0 (MCU mode 0)

On-chip ROM invalid, external 8-bit space (112 pin

and 120 pin), external 16-bit space (144 pin)

Mode 1 (MCU mode 1)

On-chip ROM invalid, external 16-bit space (112

pin and 120 pin), external 32-bit space (144 pin)

Mode 2 (MCU mode 2)

On-chip ROM valid, with an external space (bus

width setting is performed by the bus state

controller)

Mode 3 (MCU mode 3)

On-chip ROM valid, single chip mode

Mode 7 (PROM mode)

—

0: Low

1: High

*: Refer to section 3, Operating Modes.

With the PROM version, programs can be written in the same manner as with an ordinary

EPROM by setting the LSI to PROM mode and using a standard EPROM writer.

21.2

PROM Mode

21.2.1

PROM Mode Settings

When programming the on-chip PROM, set the pins as shown in figure 21.2, 21.3, or 21.4, and

perform the programming in PROM mode.

21.2.2

Socket Adapter Pin Correspondence and Memory Map

Connect the socket adapter to the SH7040 series chip as shown in figure 21.2 or 21.3. This will

allow the on-chip PROM to be programmed in the same manner as an ordinary 32-pin EPROM

(HN27C101). Figures 21.2, 21.3, and 21.4 show the correspondence between the SH7040 Series

pins and HN27C101 pins. Figure 21.5 is a memory map of the on-chip ROM.

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