I-40
EPSON
S1C6S3N2 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
Output Ports (R00–R03, R10–R13)
The S1C6S3N2 Series has general output ports (4 bits
x
2).
Output specifications of the output ports can be selected
individually with the mask option. Two kinds of output
specifications are available: complementary output and Pch
open drain output.
Further, the mask option enables the output ports R10,
R12, and R13 to be used as special output ports.
The R10, R11 and R13 ports have larger drive capability
than the R00–R03 and R12 ports.
Figure 4.5.1 shows the configuration of the output ports.
Configuration of
output ports
4.5
The mask option enables the following output port selection.
(1) Output specifications of output ports
Output specifications for the output ports (R00–R03,
R10–R13) enable selection of either complementary
output or Pch open drain output for each of the eight
bits.
However, even when Pch open drain output is selected,
voltage exceeding source voltage must not be applied to
the output port.
Mask option
Register
Data bus
Address
V
DD
V
SS
R
Mask option
Fig. 4.5.1
Configuration of output ports
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