NEC v850-sf1 Manuale Utente

User’s Manual  U15447EJ1V0UM

(1) V

DD0

 in the target system is used to sense the level for target system power supply ON/OFF.

• When V

DD0

 is lower than 1 V, it is judged that the target system is not connected, and mapping of the target

memory cannot be performed with a debugger (FCAN cannot be used).

• When V

DD0

 is 1 V or higher, it is judged that the target system is connected, and mapping of the target

memory can be performed with a debugger (FCAN can be used).

(2) PORTV

DD

 in the target system is not supplied directly to the emulator chip; it is connected to the target voltage

emulation circuit.

• When PORTV

DD

 is lower than 3 V, V

CC

 (5 V) in the internal emulator is supplied to the emulator chip.

• When PORTV

DD

 is 3 V or higher, a voltage of the same potential as PORTV

DD

 in the target system is

generated and supplied to the emulator chip.

Relay

V850/SF1

I/O chip

Target voltage

emulation

ON/OFF?

Evaluation

chip

Target

system

V

CC

 (5 V)

PORTV

DD

(66 pins)

V

DD 

(8 pins)

IE-703079-MC-EM1

IE-703002-MC