Precautions; Precautions For Operation; Differences From Actual Ic - Epson S1C62 Family Reference Manual

EVALUATION BOARD S5U1C62XXXE

3 PRECAUTIONS

Take the following precautions when using the S5U1C62xxxE:

3.1 Precautions for Operation

• Turn the power of all equipment off before connecting or disconnecting cables.
• To turn the POWER switch of the S5U1C62xxxE off, then on again, wait for at least 10 seconds after
turning off before turning on.
• When ROMs are inserted into the L and H ROM sockets, lock the lever securely by positioning it
horizontally. After the ROMs have been removed from the sockets, lock the lever at the same position
above. If the lever is left upright, poor contact may result.
• Confirm that the ROMs have been installed correctly, then operate the S5U1C62xxxE.
• If the S5U1C62xxxE does not operate normally, perform the operation test. (See "S5U1C62xxxE
Manual".)

3.2 Differences from Actual IC

There are some differences in functions between the S5U1C62xxxE and the actual IC.
I/O differences
The response time has been changed by the differences in logic level (5 V for the S5U1C62xxxE), output
drive capability, and pull-down/up resistance. When creating key scan routines, especially, pay
attention to the response time.
LCD differences
• The LCD contrast is adjusted by the VADJ control. However, the contrast level of each actual IC is
fixed, so it cannot be adjusted.
• No Pch/Nch open drain option can be selected.
• The output drive capability is different.
Power-on sequence differences
The S5U1C62xxxE performs configuration and determines the internal state when the power is
switched on. Then, it works as the IC does. Therefore, the I/O state of the S5U1C62xxxE is unstable
until configuration has completed. This affects the power-on reset time.
Function differences
The oscillation start and stop times are different from those of the IC.
Because the logic level of S5U1C62xxxE is higher than it of actual IC.
Functions may differ depending on the model, so you should refer to the "S5U1C62xxxE Manual" for other
differences.
VII-2
EPSON
DEVELOPMENT TOOL REFERENCE MANUAL
S1C62 FAMILY