aPPenDiX B PeRiPheRal CiRCuiT BOaRDS FOR S1C6F016
S1C63003/004/008/016 TeChniCal Manual
Seiko epson Corporation
aP-B-9
(Rev. 1.1)
(5) Terminate the debugger and then turn the ICE off.
(6) Set the DIP switch "IOSEL2" on the S5U1C63000P6 board to the "D" position.
(7) Turn the ICE on and invoke the debugger again. Debugging can be started here.
usage Precautions
B.4
To ensure correct use of the peripheral circuit board, please observe the following precautions.
Operational precautions
B.4.1
(1) Before inserting or removing cables, turn off power to all pieces of connected equipment.
(2) Do not turn on power or load mask option data if all of the I/O ports (P00–P03) are held high. Doing so may
activate the multiple key entry reset function.
(3) Before debugging, always be sure to load mask option data.
Differences with the actual iC
B.4.2
(1) Differences in i/O
<interface power supply>
This tool and target system interface voltage is set to +3.3 V. To obtain the same interface voltage as in the actual
IC, attach a circuit such as a level shifter on the target system side to accommodate the required interface volt-
age.
<Output port drive capability>
The drive capability of each output port on this tool is higher than that of the actual IC. When designing application
system and software, refer to "Electrical Characteristics" to confirm each output port’s drive capability.
<Port protective diode>
All I/O ports incorporate a protective diode for V
DD
and V
SS
, and the interface signals between this tool and the
target system are set to +3.3 V. Therefore, this tool and the target system cannot be interfaced with voltages ex-
ceeding V
DD
by setting the output ports for open-drain mode.
<Pull-down resistance value>
The pull-down resistance values on this tool are set to 220 k
Ω
which differ from those for the actual IC. For the
resistance values on the actual IC, refer to "Electrical Characteristics."
Note that when using pull-down resistors to pull the input pins low, the input pins may require a certain period to
reach a valid low level. Exercise caution if a key matrix circuit is configured using a combination of output and
input ports, since fall delay times on these input ports differ from those of the actual IC.
<Schmitt input>
The P00–P03 and P10–P13 ports of the actual IC can be configured to Schmitt level input interface. The P20–P23,
P30–P33, P40–P43, and P50–P53 ports support Schmitt level input interface only. This tool supports CMOS level
interface only and does not supports Schmitt inputs.
Note: The P40–P43 ports do not exist in the S1C63004. The P30–P33 and P40–P43 ports do not exist in
the S1C63003.
(2) Differences in current consumption
The amount of current consumed by this tool is different significantly from that of the actual IC. Inspecting the
LEDs on S5U1C63000P6 may help you keep track of approximate current consumption. The following factors/
components greatly affect device current consumption: