SH7052 datasheet(79/919 Pages) RENESAS

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Section 3 Operating Modes

3.1

Operating Mode Selection

The SH7052F/SH7053F/SH7054F has five operating modes that are selected by pins MD2 to

MD0 and FWE. The mode setting pins should not be changed during operation of the

SH7052F/SH7053F/SH7054F, and only the setting combinations shown in Table 3.1 should be

used. The PV

CC1 power supply voltage must be within the range shown in table 3.1.

Table 3.1

Operating Mode Selection

Operating

Pin Settings

On-Chip

Area 0

Bus

Mode No.

FWE

MD2

MD1

MD0

Mode Name

ROM

Width

CC1 Voltage

Mode 0

0100

MCU expanded

Disabled

8 bits

3.3 V ±0.3 V

Mode 1

0101

mode

16 bits

Mode 2

0110

Enabled

Set by

BCR1

Mode 3

0111

MCU single-chip

mode

Enabled

—

5.0 V ±0.5 V

Mode 4

1100

Boot mode

Enabled

Set by

BCR1

3.3 V ±0.3 V

Mode 5

1101

—

5.0 V ±0.5 V

Mode 6

1110

User program

mode

Enabled

Set by

BCR1

3.3 V ±0.3 V

Mode 7

1111

—

5.0 V ±0.5 V

—

0/1

Programmer mode —

—

3.3 V ±0.3 V

There are two MCU operating modes: MCU single-chip mode and MCU expanded mode.

Modes in which the flash memory can be programmed are boot mode and user program mode (the

two on-board programming modes) and programmer mode in which programming is performed

with an EPROM programmer (a type which supports programming of this device).

For details, see section 20, ROM (SH7052F/SH7053F) and section 21, ROM (SH7054F).

Caution: In the SH7052F/SH7053F/SH7054F expanded modes (modes 0, 1, and 2), the

guaranteed operating range of bus port power supply (port power supply 1: PV

CC1) in

the MCU expanded modes is 3.3 V ±0.3 V.

Since operation is not guaranteed in the MCU expanded modes on a voltage outside this

range, a voltage within this range must be used.

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