R0E00008AKCE00EP52 Datasheet, PDF (38/43 Pages) Renesas Technology Corp – Microcomputer Development Environment System

E8a Emulator
6. Notes on Using the E8a Emulator
6.3 Count source protect mode
When downloading the program that enables the count source protect mode, the E8a emulator sets both of the bit 2 and bit 3
of the optional function select area (OFS: FFFFFFEFh) to 0b.
b3, b2: Watchdog Timer Prescaler Select Bit
0 0 : Divide-by-8 (WDK3 to WDK2 = 00b)
Applicable MCUs:
R32C/120, R32C/121, R32C/151, R32C/152, R32C/153, R32C/156, R32C/157, R32C/160 and R32C/161
6.4 Power supply
(1) Consumption current
When the E8a emulator does not supply power to the user system, it consumes the power voltage of the user system from
several mA to more than 10 mA. This is because the user power supply drives 74LVC125, 74LVC1T45 and 74LVC2T45 to
make the communication signal level match the user system power supply voltage.
(2) E8a emulator power supply
When writing a program with the E8a emulator for mass production processes, the program requires reliability, so do not use
the E8a emulator power supply function. Supply power separately to the user system according to the allowable voltage for
MCU writing. Voltage supplied from the E8a emulator depends on the quality of the USB power supply of the PC, and as
such, precision is not guaranteed.
Note that when debugging the system which operates the MCU with a dual power supply, power cannot be supplied from the
E8a.
6.5 Operation during a user program halt
(1) Peripheral I/Os during a halt
During a user program halt, interrupts are not accepted although peripheral I/Os continue to run. For example, a timer
interrupt is not accepted although the timer continues to count when a user program is stopped by a break after the timer
started.
REJ10J1877-0201 Rev.2.01 Jun. 26, 2009
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