Renesas SuperH SH7600 Series Manual de usuario descargar pdf (Pagina 15)

7. Memory Access during User Program Break

The emulator can download the program for the flash memory area (refer to section 6.22,

Download Function to the Flash Memory Area, in the Debugger Part of the SuperH

Family

E10A-USB Emulator User’s Manual). Other memory write operations are enabled for the

RAM area. Therefore, an operation such as memory write or BREAKPOINT should be set

only for the RAM area.

8. Cache Operation during User Program Break

When cache is enabled, the emulator accesses the memory by the following methods:

At memory write: Writes through the cache, then writes to the memory.

At memory read: Does not change the cache write mode that has been set.

Therefore, when memory read or write is performed during user program break, the cache state

will be changed.

9. Loading Sessions

Information in [JTAG clock] of the [Configuration] dialog box cannot be recovered by loading

sessions. Thus the TCK value will be 2.5 MHz.

10. [IO] 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 2.2 Watchdog Timer 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 [IO] window or [Memory] window.

• The internal I/O registers can be accessed from the [IO] window. After the I/O-register

definition file is created, the MPU’s specification may be changed. If each I/O register in

the I/O-register definition file differs from addresses described in the hardware manual,

change the I/O-register definition file according to the description in the hardware manual.

The I/O-register definition file can be customized depending on its format. Note that,

however, the emulator does not support the bit-field function.

• Verify

In the [IO] window, the verify function of the input value is disabled.

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Renesas SuperH SH7600 Series Manual de usuario Pagina 15