User`s manual
SuperH Family E10A-USB Emulator Appendix E I/O File Format
R20UT0870EJ1000 Rev. 10.00 Page 281 of 292
Aug 10, 2012
Appendix E I/O File Format
The High-performance Embedded Workshop formats the [IO] window based on information it
finds in an I/O Register definition file. When you select a debugging platform, the High-
performance Embedded Workshop will look for a “<device>.IO” file corresponding to the
selected device and load it if it exists. This file is a formatted text file that describes the I/O
modules and the address and size of their registers. You can edit this file, with a text editor, to add
support for memory mapped registers or peripherals you may have specific to your application
(e.g. registers in an ASIC device mapped into the microcomputer's address space).
The following describes two formats of the “<device>.IO” file that supports or not the bit field.
E.1 File Format (Bit Field Not Supported)
Each module name must be defined in the [Modules] definition section and the numbering of each
module must be sequential. Each module corresponds to a register definition section and within
the section each entry defines an I/O register.
The [BaseAddress] definition is for devices where the location of I/O registers moves in the
address space depending on the CPU mode. In this case, the [BaseAddress] value is the base
address of the I/O registers in one specific mode and the addresses used in the register definitions
are the address locations of the registers in the same mode. When the I/O register file is actually
used, the [BaseAddress] value is subtracted from the defined register address and the resultant
offset added to the relevant base address for the selected mode.
The [Register] definition entry is entered in the format <name> = <address> [<size>
[<absolute>]].
1. <name> register name to be displayed.
2. <address> address of the register.
3. <size> which may be B, W, or L for byte, word, or longword (default is byte).
4. <absolute> which can be set to A if the register is at an absolute address. This is
only relevant if the I/O area address range moves about on the CPU in different
modes. In this case, if a register is defined as absolute the base address offset
calculation is not performed and the specified address is used directly.
Comment lines are allowed and must start with a “;” character.