( 16 / 40 )
Table 4.3 Functions of the switches (2/2)
Factory-setting
Description
Switch position
Label
Does not connect the pullup resistor 68 k
Ω
to
the port P1
0
.
Connects the pullup resistor 68 k
Ω
to the port
P1
0
.
Does not connect the pullup resistor 68 k
Ω
to
the port P1
1
.
Connects the pullup resistor 68 k
Ω
to the port
P1
1
.
Does not connect the pullup resistor 68 k
Ω
to
the port P1
2
.
Connects the pullup resistor 68 k
Ω
to the port
P1
2
.
Does not connect the pullup resistor 68 k
Ω
to
the port P1
3
.
Connects the pullup resistor 68 k
Ω
to the port
P1
3
.
Uses the ports D
6
and D
7
.
Uses the sub-clock oscillator circuit.
SW4
SW5
SW6
SW7
SW8
SW9
OFF
ON
OFF
ON
OFF
ON
OFF
ON
551
555
PORT
XC
OFF
OFF
OFF
OFF
PORT
555
Operates the M34551T2-MCU for 4551 group.
Operates the M34551T2-MCU for 4555 group.
PORT
XC
PORT
XC
555
551
555
551
Summary of Contents for Single-Chip Microcomputer M34551T2-MCU
Page 10: ... 8 40 MEMO ...
Page 12: ... 10 40 MEMO ...
Page 14: ... 12 40 MEMO ...
Page 22: ... 20 40 Figure 4 6 Schematic circuit diagram of OSC 2 4 0 MHz ...
Page 26: ... 24 40 MEMO ...
Page 30: ... 28 40 MEMO ...
Page 38: ... 36 40 MEMO ...