User`s manual

SuperH™ Family E10A-USB Emulator Section 2 Software Specifications when Using the Emulator
R20UT2188EJ0100 Rev. 1.00 Page 20 of 24
Aug 09, 2012
• Branch trace
If breaks occur immediately after executing non-delayed branch and TRAPA instructions and
generating a branch due to exception or interrupt, a trace for one branch will not be acquired
immediately before such breaks.
However, this does not affect on generation of breaks caused by a BREAKPOINT and a break
before executing instructions of Event Condition.
• Writing memory immediately before generating a break
If an instruction is executed to write memory immediately before generating a break, trace
acquisition may not be performed.
2.2.3 Notes on Using the JTAG (H-UDI) Clock (TCK)
1. Set the JTAG clock (TCK) frequency to lower than 20 MHz and the frequency of the
peripheral module clock.
2. The initial value of the JTAG clock (TCK) is 2.5 MHz.
3. A value to be set for the JTAG clock (TCK) is initialized after executing [Reset CPU] or
[Reset Go]. Thus the TCK value will be the initial value.
2.2.4 Notes on Setting the [Breakpoint] Dialog Box
1. When an odd address is set, the next lowest even address is used.
2. A BREAKPOINT is accomplished by replacing instructions of the specified address.
It cannot be set to the following addresses:
⎯ An area other than CS and the internal RAM
⎯ An instruction in which Break Condition 2 is satisfied
⎯ A slot instruction of a delayed branch instruction
3. During step operation, specifying BREAKPOINTs and Event Condition breaks are disabled.
4. When execution resumes from the address where a BREAKPOINT is specified and a break
occurs before Event Condition execution, single-step operation is performed at the address
before execution resumes. Therefore, realtime operation cannot be performed.
5. When a BREAKPOINT is set to the slot instruction of a delayed branch instruction, the PC
value becomes an illegal value. Accordingly, do not set a BREAKPOINT to the slot
instruction of a delayed branch instruction.
6. If an address of a BREAKPOINT cannot be correctly set in the ROM or flash memory area, a
mark z will be displayed in the [BP] area of the address on the [Source] or [Disassembly]
window by refreshing the [Memory] window, etc. after Go execution. However, no break will
occur at this address. When the program halts with the event condition, the mark z
disappears.
2.2.5 Notes on Setting the [Event Condition] Dialog Box and the BREAKCONDITION_
SET Command
1. When [Go to cursor], [Step In], [Step Over], or [Step Out] is selected, the settings of Event
Condition 3 are disabled.
2. When an Event Condition is satisfied, emulation may stop after two or more instructions have
been executed.