8
EPSON
E0C88832/88862 TECHNICAL MANUAL
1 INTRODUCTION
1.5 Mask Option
Mask options shown below are provided for the
E0C88832/88862. 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 the
E0C88832/88862, is used for this selection. Mask
pattern of the IC is finally generated based on the
data created by the WINFOG. Refer to the "E0C88
Family Development Tool Manual" for details on
the WINFOG.
Functions selectable with E0C88832/88862 mask options
(1) RESET terminal pull-up resistor
This mask option can select whether the pull-up
resistor for the RESET terminal is used or not.
(2) External reset by simultaneous LOW
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
4.1.2, "Simultaneous LOW level input at input
port terminals K00–K03", for details.
(3) OSC1 oscillation circuit
The specification of the OSC1 oscillation circuit
can be selected from among four types: "Crystal
oscillation", "CR oscillation", "Crystal oscillation
(gate capacitor built-in)" and "External clock
input". Refer to Section 5.3.3, "OSC1 oscillation
circuit", for details.
(4) OSC3 oscillation circuit
The specification of the OSC3 oscillation circuit
can be selected from among four types: "Crystal
oscillation", "Ceramic oscillation", "CR
oscillation" and "External clock input". Refer to
Section 5.3.4, "OSC3 oscillation circuit", for
details.
(5) Input port pull-up resistor
This mask option can select whether the pull-up
resistor for the input port terminal is used or
not. It is possible to select for each bit of the
input ports. Refer to Section 5.4, "Input Ports (K
ports)", for details.
(6) R26, R51 output port specifications
The R26 port can be configured as a general-
purpose output port or as the TOUT output
port (TOUT inverted output).
The R51 port can be configured as a general-
purpose output port or as the BZ output port
(BZ inverted output). Refer to Section 5.5,
"Output Ports (R ports)", for details.
(7) I/O port pull-up resistor
This mask option can select whether the pull-up
resistor for the I/O port terminal (it works
during input mode) is used or not. It is possible
to select for each bit of the I/O ports. Refer to
Section 5.6, "I/O Ports (P ports)", for details.
Since P10 to P13 are shared with the serial
interface I/O terminals, the selected P10 and
P12 terminal configuration is applied to the
serial input (SIN) terminal and serial clock input
terminal (SCLK in clock synchronous mode)
when the serial interface is used. Refer to
Section 5.7, "Serial Interface", for details.
(8) LCD drive duty
The drive duty for the built-in LCD driver can
be selected whether it will be 1/32 and 1/16
software-switched or fixed at 1/8. Refer to
Section 5.11, "LCD Controller", for details.
(9) LCD power supply
Either the internal power supply or an external
power supply can be selected as the LCD
system power source. Furthermore, when using
the internal power supply, the LCD drive
voltage can be set for a 4.5 V panel or a 5.5 V
panel and the drive bias to 1/5 or 1/4. Refer to
Section 5.11, "LCD Controller", for details.
(10) Initial reset by SVD circuit
The SVD circuit has a function that generates an
initial reset signal when the supply voltage
drops to level 0 or less. The mask option is used
to select whether this function is used or not.
Refer to Section 5.13, "Supply Voltage Detection
(SVD) Circuit", for details.
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