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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 pro-
gramming 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 sup-
ply 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.
* Pay attention to the pin number assignment. (It is the reverse order of the target interface connector.)
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 tar-
get system.
When using the TARGET RST OUT output, a reset circuit as shown in the figure below is recommended.
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 5.0 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.
Flash programming voltage output (FlaSH VCC OUT)
Depending on the Flash memory module built into the S1C processor on the target system, its programming
voltage (7 V) can be supplied from the S5U1C17001H. The maximum current that can be supplied is 200 mA.
To use this output, set SW8 to ON and connect between the FLASH VCC OUT pin and the power supply pin
on the target system. When SW8 is set to ON, the FLASH VCC OUT pin always outputs a 7-V voltage regard-
less of whether the RESET/START switch is pressed or not.
note: Refer to the technical manual of each model as to whether the target S1C processor is operable
with this voltage or not. Do not use this voltage unless there is a description about the usage in
the technical manual, as the S1C processor may be destroyed due to overvoltage.
10
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Table 4.1.2.1 Pin Assignment of the Flash Programming Power Supply Connector (White)
no.
Pin name
1
FLASH VCC OUT
1
2
3
4
• • • •
2
GND
3
TARGET RST OUT
4
TARGET VCC IN
S5U1C17001H
4
TARGET RST OUT
3
2
1
Figure 4.1.2.1 Example of Target Reset Circuit
I/O
Pin function
O
Flash programming voltage output pin
–
Power supply GND pin
O
Target reset signal output pin
I
Target voltage input pin
Target system
S1C processor
Pull-up resistor
#RESET
Reset circuit on
the target system
Reset switch
ePSOn
S5U1C17001H USer ManUal
(ICD MInI Ver. 1.0)
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