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CHAPTER 3: PRECAUTIONS ON USING THE S5U1C63007P PERIPHERAL CIRCUIT BOARD
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CHAPTER
Follow the precautions described below to ensure that your S5U1C63007P board is used properly. Note,
however, that some functions described here may not be available with some models. For details, refer to
the technical hardware manual for each model.
3.1 Operation Precautions
(1) Always be sure to power off all connected equipment before connecting or disconnecting the cable.
(2) Do not turn the power on and do not load any mask option data while the input ports (K00–K03) are
all set to low level. It may cause a simultaneous key input reset.
3.2 Differences from an Actual IC
The S5U1C63007P emulation board differs in terms of functionality and characteristics from an actual IC,
a fact with requires your attention. If these differences are ignored, there is a possibility that your circuit
will not operate properly on an actual IC even though it might have performed well on the ICE.
(1) Difference in I/O
<Interface voltage>
The interface voltage between the S5U1C63007P board and the target system is fixed at +5 V. There-
fore, if your emulation requires using the same interface voltage as that of an actual IC, add a level
shifter circuit or some other appropriate circuit to the target system to satisfy this requirement.
<Output port drive capability>
The drive capability of each output port on the S5U1C63007P board is somewhat higher than that of
an actual IC. Check the drive capacity of each output terminal on the model by referring to its techni-
cal hardware manual before you design the system and software.
<Protective diode at each port>
The S5U1C63007P board contains V
voltage with the target is fixed at +5 V. Therefore, you cannot set the output ports on the
S5U1C63007P board for open-drain output and interface them with a voltage level exceeding V
<Pull-up resistance>
The pull-up resistors on the S5U1C63007P board are fixed to a resistance value of about 220 kΩ which
is different from that of an actual IC. Consult the technical hardware manual to check the pull-up
resistance of the actual IC.
When turning input terminals high with pull-up resistors, note that there is a difference in the time it
takes to set up the high level. For example, if you configure a key matrix circuit using a combination
of output and input ports, and pull the configuration high with pull-up resistors at the input ports, a
difference may result in a rise time delay.
(2) Difference in current consumption
Current consumption in the S5U1C63007P board greatly differs from that in an actual IC. Check the
LEDs on the S5U1C63007P board to estimate the approximate current consumption of the board. The
following lists the items that greatly affect the amount of current consumption:
- Those that can be estimated by checking LEDs and monitor pins
a) CPU operating voltage switching circuit (VDC)...Unused
b) OSC3 oscillation ON/OFF circuit (OSCC)
c) CPU clock switching circuit (CLKCHG)
S5U1C63007P MANUAL (PERIPHERAL CIRCUIT
BOARD FOR S1C63557/63558/63567)
P
RECAUTIONS ON
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ERIPHERAL
and V
protective diodes at all I/O ports and the interface
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S5U1C63007P
SING THE
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