HD6417729 HITACHI [Hitachi Semiconductor], HD6417729 Datasheet - Page 235

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HD6417729

Manufacturer Part Number
HD6417729
Description
Hitachi Microcomputer Development Environment System
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet

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18. [I/O Registers] window
Table 6.8
Register Name
WTCSR(W)
WTCNT(W)
WTCSR(R)
WTCNT(R)
19. Note on [Registers] Window Operation During Program Execution
20. Note on Radix in the [Register] Dialog Box
Display and modification
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.
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.
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.
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.
Watchdog Timer Register
Usage
Write
Write
Read
Read
Register
Watchdog timer control/status register
Watchdog timer counter
Watchdog timer control/status register
Watchdog timer counter
Rev. 2.0, 01/01, page 211 of 216

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