Chapter 1 O Utline - Epson S1C63616 Technical Manual

1.5 Mask Option
Mask options shown below are provided for the S1C63616. 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, that has been prepared as the development software tool of S1C63616, is used for this
selection. Mask pattern of the IC is finally generated based on the data created by the winfog. Refer to the
"S5U1C63000A Manual" for the winfog.
<Outline of the mask option>
(1) OSC1 oscillation circuit
The OSC1 oscillator type is fixed at crystal oscillation. Refer to Section 4.4.3, "OSC1 oscillation circuit",
for details.
(2) OSC3 oscillation circuit
The OSC3 oscillator type can be selected from ceramic oscillation or CR oscillation (external R). Refer to
Section 4.4.4, "OSC3 oscillation circuit", for details.
(3) RESET terminal pull-down resistor
This option is used to select whether an internal pull-down resistor is incorporated into the RESET input
port. Refer to Section 2.2.1, "Reset terminal (RESET)", for details.
(4) I/O port pull-down resistor
This option is used to select whether an internal pull-down resistor that will be enabled in input mode
is incorporated into each I/O port (P00–P03, P10–P13, P20–P23, P40–P43). Refer to Section 4.5.2, "Mask
option", for details.
(5) Output specification of the I/O port
This option is used to select either complementary output or P-channel open drain output as the output
cell type of each I/O port (P00–P03, P10–P13, P20–P23, P40–P43). Refer to Section 4.5.2, "Mask option",
for details.
(6) Multiple key entry reset function (by simultaneous high input to the P1x ports)
This option is used to select whether the function to reset the IC by pressing multiple keys simultane-
ously is implemented or not. A combination of the P1x ports (P10–P13) to be used for this function can
also be selected. Refer to Section 2.2.2, "Simultaneous high input to P1x ports (P10–P13)", for details.
(7) Time authorize circuit for the multiple key entry reset function
When the multiple key entry reset option (option (6)) is selected, the time authorize circuit can also be
incorporated. The time authorize circuit measures the high pulse width of the simultaneous input sig-
nals and asserts the reset signal if it is longer than the predetermined time. This option is not available
when the multiple key entry reset option is not selected. Refer to Section 2.2.2, "Simultaneous high input
to P1x ports (P10–P13)", for details.
(8) LCD drive power supply
This option is used to select the LCD drive bias from 1/5 bias (with V
V reference voltage) and 1/4 bias (with V
C2
for LCD driving", for details.
reference voltage). Refer to Section 4.6.2, "Power supply
C1
SIC63616-(Rev. 1.0) NO. P6
reference voltage), 1/4 bias (with
C2
3240-0412