Specifications

I-26 EPSON S1C6S2N7 TECHNICAL HARDWARE

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)

The mask option enables the following output port selection.

(1) Output specification of output port

The output specifications for the output port (R00–R03)

may be either complementary output or Pch open drain

output for each of the four bits. However, even when Pch

open drain output is selected, a voltage exceeding the

source voltage must not be applied to the output port.

(2) Special output

In addition to the regular DC output, special output can

be selected for output ports R00 and R01, as shown in

Table 4.4.1. Figure 4.4.2 shows the structure of output

ports R00–R03.

Mask option

Table 4.4.1

Special output

FOUT or BUZZER

BUZZER

R00

R01

Pin Name When Special Output is Selected

Fig. 4.4.2

Structure of output ports

R00–R03

Address

(0F3H)

Data bus

(R03)

(R02)

(R01)

(R00)

Mask option

R03

R02

R01

R00

FOUT

BUZZER