Rohm Lapis EASE1000 V2, User Manual

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EASE1000 V2 User’s Manual
2.5.3 Supplying Target LSI V
DD
2.5.3.1 Supplying Target LSI V
DD
from EASE1000 V2
EASE1000 V2 has the pin (3.3VOUT) to 3.3 V/100 mA (max) as a target LSI operation power supply.
When this power supply is used, the flash writer, on-chip debug emulator’s application program download and
software breakpoint functions are available even when the power supply voltage of the target system is set to a
value outside the flash memory operation voltage range of the target LSI.
EASE1000 V2
interface connector
VTref
1
3.3VOUT
13
NC
Vss
2,4,6,8,10,12
3,9,11,14
~
V
DD
Vss
Target LSI
Figure 2-8 Target System Connection Example (3.3VOUT Used)
Note
When using the 3.3VOUT power supply of EASE1000 V2, do not apply power of the target
system to the V
DD
pin of the target LSI.
If both power supplies are connected, it may cause fire, electric shock or failure.
2.5.3.2 Outputting Target System Power Supply to Target LSI V
DD
The following shows a circuit configuration example for the case of outputting the target system power supply to the
target LSI V
DD
without using 3.3VOUT of EASE1000 V2.
EASE1000 V2
interface connector
VTref
1
3.3VOUT
13
NC
Vss
2,4,6,8,10,12
3,9,11,14
~
V
DD
Vss
Target LSI
~
Power Supply
Figure 2-9 Target System Connection Example (3.3VOUT Not Used)
Note
When using the target system power supply, do not connect 3.3VOUT pin and VTref pin.
If both pins are connected, it may cause fire, electric shock or failure.
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