5. CONNECTION
22
EPSON
S1C33 Family In-Circuit Debugger
S5U1C33001H1400 Manual (Rev. 0.20)
5.3
Connector for flash programmer power supply
This connector is used to output reset signals to the target system, to output voltage for flash
programming, and to input target interface voltage. Debugging is possible without connecting these
signals. If necessary, use the cable for flash programmer power supply provided with the
S5U1C33001H to connect the target system. The pin assignment of the 4-pin connector (white) of the
S5U1C33001H is shown in the table below.
Table 5 Pin assignment of the flash programmer power supply connector (white)
No.
Pin name
I/O
Pin function
1
FLASH VCC OUT
O
Flash programming voltage output
2
GND
-
Power supply (GND)
3
TARGET RST OUT
O
Target system reset signal output
4 TARGET
VCC
IN
I Target system voltage input
*
Note the sequence of Pin Nos. (This sequence is reversed in the connector for connecting to target
systems.)
5.3.1
Target system reset signal output (TARGET RST OUT)
Pressing the RESET/START switch outputs a reset signal from the TARGET RST OUT
pin to the target system.
The following circuit structure is recommended to use this reset output.
Fig. 10 Example of reset circuit
Note: High (voltage level set by DIP SW4, SW5) or Low (GND level) is output as a target
reset signal.
5.3.2
Target voltage input (TARGET VCC IN)
In addition to 3.3 V and 1.8 V, the voltage (1.0 to 5.0 V) input from the target system can
be used as an interface for the target system. To use this function, set the DIP SW4 to ON
and apply a voltage from the target system to the TARGET VCC IN pin.
