Output Ports (R00-R03, R10-R13 And R20-R23); Configuration Of Output Ports; Mask Option - Epson S1C63558 Technical Manual

Epson network device technical manual
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4.5 Output Ports

4.5.1 Configuration of output ports

The S1C63558 has 12 bits general output ports.
Output specifications of the output ports can be selected individually with the mask option. Two kinds of
output specifications are available: complementary output and N-channel open drain output.
Figure 4.5.1.1 shows the configuration of the output port.
The R00 to R03 output terminals are shared with the buzer/clock outputs (XBZ, BZ, TOUT, FOUT). The
R10 to R13 output terminals are shared with the tone/pulse dialer outputs (XTMUTE, XRMUTE, HDO,
HFO). These functions are selected by the software.
At initial reset, these are all set to the general purpose output port.
Table 4.5.1.1 shows the setting of the output terminals by function selection.
Terminal
Terminal status
name
at initial reset
R00
R00 (HIGH output)
R01
R01 (HIGH output)
R02
R02 (HIGH output)
R03
R03 (HIGH output)
R10
R10 (HIGH output)
R11
R11 (HIGH output)
R12
R12 (HIGH output)
R13
R13 (HIGH output)
R20–R23
R20–R23 (HIGH output)
When using the output port as the special output port, the data register must be fixed at "1" and the high
impedance control register must be fixd at "0" (data output).

4.5.2 Mask option

Output specifications of the output ports can be selected with the mask option.
Either complementary output or N-channel open drain output can be selected individually (1-bit units).
However, when N-channel open drain output is selected, do not apply a voltage exceeding the power
supply voltage to the output port.
S1C63558 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
(R00–R03, R10–R13 and R20–R23)
Address
High impedance
control register
Data register
Address
Fig. 4.5.1.1 Configuration of output port
Table 4.5.1.1 Function setting of output terminals
FOUT
TOUT
R00
R00
R01
R01
R02
TOUT
FOUT
R03
R10
R10
R11
R11
R12
R12
R13
R13
R20–R23
R20–R23
Mask option
Special output
BZ
XBZ
HFO
R00
XBZ
R00
BZ
R01
R01
R02
R02
R02
R03
R03
R03
R10
R10
R10
R11
R11
R11
R12
R12
R12
R13
R13
HFO
R20–R23
R20–R23
R20–R23
EPSON
V
DD
Rxx
V
SS
HDO
XRMUTE
XTMUTE
R00
R00
R00
R01
R01
R01
R02
R02
R02
R03
R03
R03
R10
R10
XTMUTE
R11
XRMUTE
R11
HDO
R12
R12
R13
R13
R13
R20–R23
R20–R23
R20–R23
33

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