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4. Connections
4.1.2
Flash Programming Power Supply Connector
The 4-pin Flash programming power supply connector (white) is used to output a reset signal and a Flash
programming voltage to the target system, and to input the target interface voltage. These signals are not
necessary for debugging. Connect between this connector and the target system using the Flash programming
power supply cable attached to the S5U1C17001H as necessary. The pin assignment of the 4-pin connector
(white) on the S5U1C17001H is shown in the table below.
Table 4.1.2.1 Pin Assignment of the Flash Programming Power Supply Connector (White)
No.
1
2
3
4
* Pay attention to the pin number assignment. (It is the reverse order of the target interface connector.)
4.1.2.1
Target reset signal output (TARGET RST OUT)
By pressing the RESET/START switch in ICD mode, the TARGET RST OUT outputs a reset signal to the target
system.
When using the TARGET RST OUT output, a reset circuit as shown in the figure below is recommended.
The connection to #RESET of target reset signal is not essential, although it allows debugging to be performed
more efficiently.
When using the Flash protection function, it is best to have a connection. Connection is also recommended in the
Flash programmer mode and when using the S5U1C17001H as the Gang Writer (Gang Programmer) using
S5U1C17000Y2. For details of the Gang Writer, refer to the S5U1C17000Y2 Gang Writer Software Manual.
4.1.2.2
Target voltage input (TARGET VCC IN)
In addition to 3.3 V and 1.8 V, the S5U1C17001H is capable of interfacing with the target system using the
voltage (1.0 to 5.5 V) input from the target system. To use this function, set SW4 to ON and input the target
voltage to the TARGET VCC IN pin.
16
Pin name
FLASH VCC OUT
GND
TARGET RST OUT
TARGET VCC IN
Figure 4.1.2.1 Example of Target Reset Circuit
Seiko Epson Corporation
I/O
O
Flash programming voltage output pin
–
Power supply GND pin
O
Target reset signal output pin
I
Target voltage input pin
Target system
Pull-up resistor
Reset circuit
on the target
system
Reset switch
Pin function
S1C processor
S5U1C17001H2 User Manual
(ICDmini Ver2.0)
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