Renesas R8C/25 Technical Information download pdf (Page 16)

Chapter 7. Modes

The RSK supports Boot mode and Single chip mode.

Details of programming the FLASH memory is described in the R8C/25 Group Hardware Manual.

7.1. Boot mode

The boot mode settings for this RSK are shown in Table 7-1: Boot Mode pin settings below:

MODE LSI State after Reset End

Low Boot Mode

Table 7-1: Boot Mode pin settings

The software supplied with this RSK supports Boot mode using an E8a and HEW only. However, hardware exists to enter boot mode

manually, do not connect the E8a in this case. Press and hold the SW1/BOOT. The mode pin is held in its boot state while reset is pressed

and released. Release the boot button. The BOOT LED will be illuminated to indicate that the microcontroller is in boot mode.

When neither the E8a is connected nor the board is placed in boot mode as above, the Mode pin is pulled high by a 4.7k resistor.

When an E8a is used the Mode pin is controlled by the E8a.

7.2. Single chip mode

Because the Mode pin is pulled high, this RSK will always boot in Single Chip mode when the E8a is not connected and the boot switch is

not depressed. Refer to R8C/25 Group Hardware Manual for details of Single chip mode.

MODE LSI State after Reset End

High Single Chip Mode

Table 7-2: Single Chip Mode pin settings

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 26 27

No comments

Renesas R8C/25 Technical Information Page 16