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EPSON
E0C6006 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
4.5 Output Ports (R00–R03)
4.5.1 Configuration of output port
The E0C6006 has 4 bits of general output ports (R00–R03).
Output specifications of the output ports can be selected individually with the mask option. Two kinds of
output specifications are available: complementary output and Nch open drain output. Also, the mask
option enables the output ports R02 and R03 to be used as special output ports. Figure 4.5.1.1 shows the
configuration of the output port.
V
DD
V
SS
R0x
Data bus
Mask option
Data
register
Address
Fig. 4.5.1.1 Configuration of output ports
In the DC output mode, the output terminal goes high (V
DD
) when "1" is written to the data register and
goes low (V
SS
) when "0" is written. At initial reset, the output terminal goes low.
4.5.2 Mask option
The mask option enables the following output port selection.
(1) Output specifications of output ports
The output specifications for the output port (R00–R03) can be selected from complementary output
and Nch open drain output for each of the four bits. However, even when Nch open drain output is
selected, a voltage exceeding the power voltage must not be supplied to the output port.
(2) Special output
In addition to the regular DC output, special output clock signal can be selected for output ports R02
and R03, as shown in Table 4.5.2.1.
Table 4.5.2.1 Special output
Output port
R02
R03
Special output
FOUT or BZ output
BZ output
The signal frequencies can also be selected by mask option.
