SH7101 datasheet(77/486 Pages) RENESAS

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3. MCU Operating Modes

Rev.2.00 Sep. 27, 2007 Page 43 of 448

REJ09B0394-0200

Section 3 MCU Operating Modes

3.1

Selection of Operating Modes

This LSI has one operating mode and four clock modes. The operating mode is determined by the

setting of MD3 to MD0, and FWP pins. Do not change these pins during LSI operation (while

power is on). Do not set these pins in the other way than the combination shown in table 3.1. This

LSI supports only mode 3.

Table 3.1

Selection of Operating Modes

Pin Setting

Mode

No.

FWP MD3

MD2

MD1

MD0 Mode Name

On-Chip ROM

Mode 3 1

Single chip mode

Active

Note:

The symbol x means “Don't care.”

The clock mode is selected by the input of MD2 and MD3 pins.

Table 3.2

Maximum Operating Clock Frequency for Each Clock Mode

Pin Setting

MD3

MD2

Maximum Operating Clock Frequency

10 MHz (Input clock

× 1, maximum of input clock: 10 MHz)

20 MHz (Input clock

× 2, maximum of input clock: 10 MHz)

40 MHz (Input clock

× 4*, maximum of input clock: 10 MHz)

40 MHz (Input clock

× 4 for system clock, Input clock × 2 for

peripheral clock, maximum of input clock: 10 MHz)

Note:

The maximum of input clock is 10 MHz so that P

φ is lower or equal to 40 MHz.

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