CHAPTER 1: OUTLINE

1.5 Mask Option

Mask options shown below are provided for the S1C63558. Several hardware specifications are prepared in each mask option, and one of them can be selected according to the application. The function option generator FOG63558, that has been prepared as the development software tool of S1C63558, is used for this selection. Mask pattern of the IC is finally generated based on the data created by the FOG63558. Refer to the "S5U1C63558D Manual" for the FOG63558.

<Functions selectable with S1C63558 mask options>(1)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 2.2.2, "Simultaneous low input to terminals K00–K03", for details.

(2)Time authorize circuit for the simultaneous LOW input reset function

When using the external reset function (shown in 1 above), using the time authorize circuit or not can be selected by the mask option. 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.

Refer to Section 2.2.2, "Simultaneous low input to terminals K00–K03", for details.

(3)Input port pull-up resistor

The mask option is used to select whether the pull-up resistor is supplemented to the input ports or not. It is possible to select for each bit of the input ports.

Refer to Section 4.4.3, "Mask option", for details.

(4)Output specification of the output port

Either complementary output or N-channel open drain output can be selected as the output specifica- tion for the output ports. The selection is done in 1-bit units.

Refer to Section 4.5.2, "Mask option", for details.

(5)Output specification / pull-up resistor of the I/O ports

Either complementary output or N-channel open drain output can be selected as the output specifica- tion when the I/O ports are in the output mode. The selection is done in 1-bit units.

Further, whether or not the pull-up resistors working in the input mode are supplemented can be selected. The selection is done in 1-bit units or 4-bit units depending on the I/O port.

1-bit unit: P20, P21, P22, P23

4-bit unit: P00–P03, P10–P13, P30–P33

Refer to Section 4.6.2, "Mask option", for details.

(6)Configuration of the LCD segment

The COM8–COM16 terminals allow selection of terminal specification between COM outputs and SEG45–SEG40 outputs.

Refer to Section 4.7.2, "Mask option", for details.

(7)External voltage detection of SVD circuit

External voltage (SVD terminal–VSSterminal) detection can be selected in addition to supply voltage (VDD terminal–VSSterminal) detection. The SVD terminal is used to input the external voltage to be detected.

Refer to Section 4.13.2, "Mask option", for details.

S1C63558 TECHNICAL MANUAL

EPSON

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