Renesas H8S/2378F Technical Information PDF herunterladen (Seite 102)

8. Programming Guide

This section describes how to write a program using the 0.18-μm F-ZTAT microcomputer standard boot program. The

section also contains tips on creating programs and notes. For details, refer to the Hardware Manual.

8.1 Overview

The 0.18-μm F-ZTAT microcomputer standard boot program consists of a transfer library, erasing library, and

programming library. The functions are listed below:

(1) Transfers the programming library or erasing library to the specified RAM area.

(2) Specifies the operating frequency by the initial setting.

(3) Specifies a block number and erases the relevant block.

(4) Specifies data to be programmed and the programming destination address and programs the data.

(5) Selects the user boot area or user area.

8.2 Control Registers and Control Bits

The control registers and control bits related to the library transfer function and user boot area are described below.

8.2.1 Selecting a Function

To select transfer, programming, or erasing, use the FKEY register. To transfer the programming or erasing library, set

the FKEY register to H'A5. To perform programming or erasing, set the register to H'5A.

Table 8-1 FKEY Register

State Value Function

Transfer enabled H’A5 Can transfer a library.

Can write a value to the SCO bit.

Programming/erasing enabled H’5A Can program or erase flash memory.

8.2.2 Starting Library Downloading

To transfer a library, set the SCO bit (bit 0 of the FCCS register) to 1.

Table 8-2 SCO Bit (Bit 0 of the FCCS Register)

State Value Function

Source program copy disabled 0 Does not download a library to RAM.

Source program copy enabled 1 Issues a request to download a library to RAM.

H'A5 must be written to FKEY and execution in on-chip RAM

must be in progress.

The SCO bit is cleared to 0 when downloading is completed.

1 2 ... 97 98 99 100 101 102 103 104 105 106 107 108 109

Keine Kommentare

Renesas H8S/2378F Technical Information Seite 102