User`s manual

5. Memory Access during User Program Execution

During execution of the user program, memory is accessed by the following two methods, as

shown in table 2.2.

Table 2.2 Memory Access during User Program Execution

Method Description

H-UDI read/write The stopping time of the user program is short because memory is

accessed by the dedicated bus master.

Short break This method is not used in this product. (Do not set short break.)

The method for accessing memory during execution of the user program is specified by using

the [Configuration] dialog box.

Table 2.3 Stopping Time by Memory Access (Reference)

Method Condition Stopping Time

H-UDI read/write Reading of one longword for the

internal RAM

Reading: Maximum 2 bus clocks

(Bφ)

Writing of one longword for the

internal RAM

Writing: Maximum 2 bus clocks (Bφ)

6. Using WDT

The WDT does not operate during break.

7. Loading Sessions

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

sessions. Thus the TCK value will be as follows:

• When HS0005KCU01H or HS0005KCU02H is used: TCK = 2.5 MHz

8. [IO] Window

• Display and modification

For each watchdog timer register, there are two registers to be separately used for write and

read operations.