Renesas H8SX Bedienungsanleitung PDF herunterladen (Seite 21)

Chapter 8.Programming Methods

All of the Flash ROM on the device (i.e. both MATs) can be programmed when the device is in Boot mode. Once in boot mode, the

boot-loader program pre-programmed into the microcontroller executes and attempts a connection with a host (for example a PC). On

establishing a connection with the microcontroller, the host may then transmit program data to the microcontroller via the appropriate

programming port.

Table 8-1 below shows the programming port for this Renesas Microcontroller and its associated pins

Programming Port Table – Programming port pins and their CPU board signal names

E8 Port (J6) E8_TXD, PIN 5 E8_RXD, PIN 11

CPU board Signal Name PTTX (Port 6, Pin0) PTRX (Port 6, Pin 1)

Table 8-1: Serial Port Boot Channel

8.1.E8 Header

This device supports an E8 debugging interface. The E8 provides additional debugging features including hardware breakpoints and

hardware trace capability. (Check with the website at

www.renesas.com or your distributor for a full feature list).

Connect the E8 to port J6.

To enable the E8 functions the user must ensure that the jumper link in position J15 is removed.

8.2.E10A Header

This device supports an optional E10A debugging interface. The E10A provides additional debugging features including hardware

breakpoints and hardware trace capability. (Check with the website at

www.renesas.com or your distributor for a full feature list).

To utilise the E10A the user will need to fit a 14 way boxed header to J5. To enable the E10A functions the user should also fit a jumper link

in position J15.

When J15 is fitted the microcontroller will not operate correctly unless operated via the E10A.

8.3.USB port programming

The microcontroller must enter boot mode for programming, and the programming port must be connected to a host for program download.

To execute the boot transition, and allow programs to download to the microcontroller, the user must perform the following procedure:

Ensure jumper link in position J16 and R133 are not fitted. (Default position)

Press the BOOT switch and keep this held down.

Press the RESET switch once, and release.

Release the BOOT switch The BOOT LED will be illuminated.

Now connect a USB cable between the host PC and the RSK at J12.

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