Specifications

S1C60N04 TECHNICAL MANUAL EPSON 13

CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)

4.4 Output Ports (R00–R03)

4.4.1 Configuration of output port

The S1C60N04 has a 4-bit general output port (R00–R03).

Output specification of the output port can be selected in a bit units with the mask option. Two kinds of

output specifications are available: complementary output and Pch open drain output. Also, the mask

option enables the output ports R00 and R01 to be used as special output ports. Figure 4.4.1.1 shows the

configuration of the output port.

Data bus

Address

R0x

Complementary

Pch open drain

Mask option

Fig. 4.4.1.1 Configuration of output port

4.4.2 Mask option

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 bit. 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 4.4.2.1. Figure 4.4.2.1 shows the structure of output ports R00–R03.

Table 4.4.2.1 Special output

Output port

R00

R01

Special output

FOUT or BUZZER output

BUZZER output

Data bus

R03

R02

R01

R00

BUZZER

FOUT

Address 0F3H

Mask option

Fig. 4.4.2.1 Structure of output ports R00–R03