Specifications

I-28 EPSON S1C6S2N7 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Output Ports)
Output port data (0F3H)
Sets the output data for the output ports.
When 1 is written: High output
When 0 is written: Low output
Reading: Valid
The output port pins output the data written to the corre-
sponding registers (R00–R03) without changing it. When 1
is written to the register, the output port pin goes high
(VDD), and when 0 is written, the output port pin goes low
(VSS). After an initial reset, all the registers are set to 0.
R00–R03
Table 4.4.3 lists the output port control bits and their ad-
dresses.
Table 4.4.3 Control bits of output port
Control of output
port
Address Comment
Register
D3 D2 D1 D0 Name SR 1 0
0F3H
R03 R02
R01 R00
R03
R02
R01
BUZZER
R00
FOUT
0
0
0
0
0
0
High
High
High
ON
High
ON
Low
Low
Low
OFF
Low
OFF
R03 output port data
R02 output port data
R01 output port data
Buzzer ON/OFF control register
R00 output port data
Frequency output ON/OFF control register
R/W
BUZZER FOUT
0FDH
XBZR 0 XFOUT1 XFOUT0
R
XBZR
0
XFOUT1
XFOUT0
0
0
0
Buzzer frequency control
2 kHz
High
High
4 kHz
Low
Low
R/WR/W
FOUT frequency control:
XFOUT1(0), XFOUT0(0) -> F1
XFOUT1(0), XFOUT0(1) -> F2
XFOUT1(1), XFOUT0(0) -> F3
XFOUT1(1), XFOUT0(1) -> F4