
Rev. 2.0, 01/01, page 211 of 216
18.[I/O Registers] window
Display and modification
Do not change values of the User Break Controller because it is used by the emulator.
For each Watchdog Timer register, there are two registers to be separately used for write
and read operations.
Table 6.8
Watchdog Timer Register
Register Name
Usage
Register
WTCSR(W)
Write
Watchdog timer control/status register
WTCNT(W)
Write
Watchdog timer counter
WTCSR(R)
Read
Watchdog timer control/status register
WTCNT(R)
Read
Watchdog timer counter
The watchdog timer operates only when the user program is executed. Do not change the
value of the frequency change register in the [I/O Registers] window or [Memory] window.
The value must be changed in the user program.
The internal I/O registers can be accessed from the [I/O registers] window. However, note
the following when accessing the SDMR register of the bus-state controller. Before
accessing the SDMR register, specify addresses to be accessed in the I/O-register definition
file (SH7729.IO and SH7709A.IO) and then activate the HDI. For details on I/O-register
definition files, refer to the Hitachi Debugging Interface User’s Manual. Note that,
however, the E10A emulator does not support the bit-field function described in the Hitachi
Debugging Interface User’s Manual.
Verify
In the [I/O Registers] window, the verify function of the input value is disabled.
19.Note on [Registers] Window Operation During Program Execution
Although a dialog box is displayed in which the register contents can be changed by double-
clicking the [Registers] window, do not change the register contents during program execution.
The changed contents are not reflected.
20.Note on Radix in the [Register] Dialog Box
The default input radix in the [Register] dialog box is hexadecimal irrespective of the Radix
display. When a radix other than a hexadecimal is input, specify the prefix code such as B’.
After the value has been input in the [Register] dialog box, the Radix setting is changed to
hexadecimal. When the radix other than a hexadecimal is used as a default, reset the Radix
display.