User`s manual

SuperH™ Family E10A-USB Emulator Section 2 Software Specifications when Using the Emulator
REJ10J1941-0300 Rev. 3.00 Page 17 of 46
Aug 25, 2010
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 three bus clocks
(Bφ)
Writing of one longword for the
internal RAM
Writing: Maximum two bus clocks
(Bφ)
Short break CPU clock: 160 MHz
JTAG clock: 20 MHz
Reading or writing of one longword
for the external area
About 50 ms
7. Memory Access to the External Flash Memory Area
The emulator can download the load module to the external flash memory area (for details,
refer to section 6.22, Download Function to the Flash Memory Area, in the SuperH
TM
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. ROM Cache
For ROM cache in the MCU, the emulator operates as shown in table 2.4.
Table 2.4 Operation for ROM Cache
Function Operation
Write and erase of the flash memory
Download of the program to the flash memory
Set an overlap of ERAM to the flash memory*
Change of the setting of an overlap of ERAM to the flash
memory*
Download of a program to ERAM overlapped with the flash
memory*
Rewrite of the memory contents of ERAM overlapped with
the flash memory*
Set a software break to the flash memory and ERAM
overlapped with the flash memory*
Writes or erases all contents of
ROM cache.
Memory read Accesses the disabled cache
area to read the content of
internal flash memory.