User`s manual

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

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 Writes or erases all contents of ROM cache.

Memory read Accesses the disabled cache area to read the content of internal flash

memory.

9. Multiplexing the Emulator Pins

A part of the emulator pins is multiplexed as shown in table 2.5.

Table 2.5 Multiplexed Functions

Function 1 Function 2

WSCK TCK

WTXD TMS

WRXD _TRST

PB30/_UBCTRG/_IRQOUT/_REFOUT _ASEBRKAK/_ASEBRK

PB22/RXD2/TCLKD/DACK2/FRAME _AUDSYNC

PB23/TXD2/TCLKC/DREQ2 AUDCK

PB24/RXD3/TCLKB/IRQ2/TEND1 AUDATA3

PB25/TXD3/TCLKA/IRQ3/DACK1 AUDATA2

PB26/SCK3/TIOC2B/DREQ1 AUDATA1

PB27/TXD3/TIOC2A/TEND0 AUDATA0

When the emulator is connected, function 1 cannot be used because the emulator uses the pins

that TCK, TMS, _TRST, and _ASEBRKAK/_ASEBRK have been multiplexed. Function 1

can be used when the pins that AUD has been multiplexed are not connected to the emulator.