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S1C63666 TECHNICAL MANUAL
EPSON
5
CHAPTER 1: OUTLINE
1.5 Mask Option
Mask options shown below are provided for the S1C63666. Several hardware specifications are prepared
in each mask option, and one of them can be selected according to the application. The function option
generator winfog and segment option generator winsog, that have been prepared as the development
software tool of S1C63666, are used for this selection. Mask pattern of the IC is finally generated based on
the data created by winfog and winsog. Refer to the "S5U1C63000A Manual" for winfog and winsog.
<Outline of the mask option>
(1) OSC1 oscillation circuit
The OSC1 oscillation circuit is fixed at crystal oscillation. Refer to Section 4.4.2, "OSC1 oscillation
circuit", for details.
(2) OSC3 oscillation circuit
The OSC3 oscillator type can be selected from ceramic oscillation, CR oscillation (external R) and CR
oscillation (built-in R). Refer to Section 4.4.3, "OSC3 oscillation circuit", for details.
(3) External voltage detection of the SVD circuit
External voltage (SVD terminal voltage) detection can be selected in addition to supply voltage (V
DD
terminal–V
SS
terminal) detection. Refer to Section 4.17.2, "Mask option", for details.
(4) Input port pull-down resistor
The mask option is used to select whether the pull-down resistor is supplemented to the input ports
or not. It is possible to select for each bit of the input ports.
Refer to Section 4.5.3, "Mask option", for details.
(5) RESET terminal pull-down resistor
This option is used to select whether the pull-down resistor is supplemented to the RESET terminal or
not. Refer to Section 2.2.1, "Reset terminal (RESET)", for details.
(6) I/O port pull-down resistor
The mask option is used to select whether the pull-down resistor working in the input mode is
supplemented to the I/O ports or not. It is possible to select for each bit of the input ports.
Refer to Section 4.7.2, "Mask option", for details.
(7) Output specification of the output port
Either complementary output or P-channel open drain output can be selected as the output specifica-
tion for the output ports R00–R03 and R10–R13. The selection is done in 1-bit units.
Refer to Section 4.6.2, "Mask option", for details.
(8) Output specification of the I/O port
For the output specification when the I/O ports P00–P03 and P10–P13 are in the output mode, either
complementary output or P-channel open drain output can be selected in 1-bit units.
Refer to Section 4.7.2, "Mask option", for details.
(9) External reset by simultaneous high input to the input port (K00–K03)
This function resets the IC when several keys are pressed simultaneously. The mask option is used to
select whether this function is used or not. Further when the function is used, a combination of the
input ports (K00–K03), which are connected to the keys to be pressed simultaneously, can be selected.
Refer to Section 2.2.2, "Simultaneous high input to terminals K00–K03", for details.
(10) Time authorize circuit for the simultaneous high input reset function
When the external reset function (shown in 9 above) is used, the time authorize circuit is enabled. The
reset function works only when the input time of simultaneous low is more than the rule time if the
time authorize circuit is being used. When the external reset function is not used, the time authorize
circuit cannot be used. Refer to Section 2.2.2, "Simultaneous high input to terminals K00–K03", for
details.