
Crystal oscillator
No.
1
2
3
4
5
6
7
8
Pin terminal
NC
CTL 3
CTL 2
CTL 1
CTL 6
CTL 5
CTL 4
GND
No.
16
15
14
13
12
11
10
9
Pin terminal
VDD
NC
RESET
NC (CSEL)
NC (EXC)
FOUT
TEST
OUT
1
2
34
56
7 8
16 15
14
13
12
11
10 9
NC: Do not connect to the external terminal.
For 8650 O
( ) shown 8640N only
11. NC
12. CLOCK 13. ENABLE
Explanation of terminal
8640AN
Terminal connection
8650E 8651E
8650B 8651B
8650A 8651A
8640BN
8650C
8640CN
Explanation of terminal (8650 O)
CTL3
CTL6
CTL3
CTL6
(Unit: Hz)
0= “L” 1=“H”
CTL3
CTL6
CTL3
CTL6
CTL3
CTL6
Setting of divider output
Baud rate generator
Setting of output frequency
(a) CTL 1 to 6 :
(b) OUT :
(c) FOUT :
(d) RESET :
(e) TEST :
(f) EXC (8640N only) :
(g) CSEL (8640N only) :
Programs dividing ratio. (pull-down resistor incorporated.)
Output frequency preset by CTL1 to 6.
(refer to the procedure for setting output frequency.)
Constantly outputs the oscillation source frequency of builtin
crystal unit.
Stops output at RESET= “L”.
(pull-up resistor incorporated.)
Used for the input terminal for testing. When CTL4 is H,
output will be 1000 times larger than the preset value at
TEST= “H”. (pull-down resistor incorporated.)
Serves as input terminal when using an external clock by
changing to the builtin oscillator.
Effective only when CSEL is H.
When this terminal is made H, the external clock is selected.
(pull-down resistor incorporated.)
Treatment of empty terminals. When RESET terminal is not used, this should be connected to VDD,
and when TEST terminal, CSEL terminal, and CTL 1 to 6 terminals are not used, to GND.
(Note)
(a) CLOCK: Clock input (Max. 1 MHz) (b) ENABLE: Be sure to connect to VDD
CTL1
0
1
CTL2
0
1
0
1
CTL3
0
1
0
1
0
1
0
1
Dividing
ratio
1/1
1/10
1/2
1/3
1/4
1/5
1/6
1/12
CTL4
0
1
CTL5
0
1
0
1
CTL6
0
1
0
1
0
1
0
1
Dividing
ratio
1/1
1/10
2
1/10
3
1/10
4
1/10
5
1/10
6
1/10
7
Set terminal
CTL1
0
1
CTL2
0
1
0
1
CTL4
CTL5
0
1
0
1
0
1
0
1
0
600k
60k
300k
200k
150k
120k
100k
50k
0
1
60k
6k
30k
20k
15k
12k
10k
5k
0
1
0
6k
600
3k
2k
1.5k
1.2k
1k
500
0
1
600
60
300
200
150
120
100
50
1
0
60
6
30
20
15
12
10
5
1
0
1
6.0
0.6
3.0
2.0
1.5
1.2
1.0
0.5
1
0
0.6
0.06
0.3
0.2
0.15
0.12
0.1
0.05
1
0.06
0.006
0.03
0.02
0.015
0.012
0.01
0.005
Set terminal
CTL1
0
1
CTL2
0
1
0
1
CTL4
CTL5
0
1
0
1
0
1
0
1
0
1M
100k
500k
333.3k
250k
200k
166.6k
83.3k
0
1
100k
10k
50k
33.3k
25k
20k
16.6k
8.3k
0
1
0
10k
1k
5k
3.3k
2.5k
2k
1.6k
833.3
0
1
1k
100
500
333.3
250
200
166.6
83.3
1
0
100
10
50
33.3
25
20
16.6
8.3
1
0
1
10
1
5
3.33
2.5
2
1.6
0.83
1
0
1
1/10
1/2
1/3
1/4
1/5
1/6
1/12
1
1/10
1/100
1/20
1/30
1/40
1/50
1/60
1/120
Set terminal
CTL1
0
1
CTL2
0
1
0
1
0
1
0
1
0
1
0
1
CTL4
CTL5
0
60k
6k
30k
20k
15k
12k
10k
5k
0
1
6.0k
600
3.0k
2.0k
1.5k
1.2k
1.0k
500
0
1
0
600
60
300
200
150
120
100
50
0
1
60
6
30
20
15
12
10
5
1
0
6.0
0.6
3.0
2.0
1.5
1.2
1.0
0.5
1
0
1
0.6
0.06
0.3
0.2
0.15
0.12
0.1
0.05
1
0
0.06
0.006
0.03
0.02
0.015
0.012
0.01
0.005
1
0.006
0.0006
0.003
0.002
0.0015
0.0012
0.001
0.0005
Set terminal
CTL1
0
1
CTL2
0
1
0
1
CTL4
CTL5
0
1
0
1
0
1
0
1
0
100k
10k
50k
33.3k
25k
20k
16.6k
8.3k
0
1
10k
1k
5k
3.3k
2.5k
2k
1.6k
833.3
0
1
0
1k
100
500
333.3
250
200
166.6
83.3
0
1
100
10
50
33.3
25
20
16.6
8.3
1
0
10
1
5
3.33
2.5
2
1.6
0.83
1
0
1
1/10
1/2
1/3
1/4
1/5
1/6
1/12
1
0
1/10
1/100
1/20
1/30
1/40
1/50
1/60
1/120
1
1/100
1/1000
1/200
1/300
1/400
1/500
1/600
1/1200
Set terminal
CTL1
0
1
CTL2
0
1
0
1
CTL4
CTL5
0
1
0
1
0
1
0
1
0
32768
3276.8
16384
10922.6
8192
6553.6
5461.3
2730.6
0
1
3276.8
327.68
1638.4
1092.26
819.2
655.36
546.13
273.06
0
1
0
327.68
32.768
163.84
109.226
81.92
65.536
54.613
27.306
0
1
32.768
3.276
16.384
10.922
8.192
6.553
5.461
2.730
1
0
3.276
0.327
1.638
1.092
0.819
0.655
0.546
0.273
1
0
1
0.3276
0.0327
0.1638
0.1092
0.0819
0.0655
0.0546
0.0273
1
0
0.03276
0.00327
0.01638
0.01092
0.00819
0.00655
0.00546
0.00273
1
0.00327
0.00032
0.00163
0.00109
0.00081
0.00065
0.00054
0.00027
CTL1
0
1
0
1
CTL2
0
1
0
CTL3
0
1
0
CTL4
0
CTL5
0
CTL6
0
1
Output frequency
768 kHz
153.6
76.8
38.4
19.2
Baud rate output
example (fo/16)
48000 bits/s
9600
4800
2400
1200
CTL1
0
1
0
1
CTL2
0
1
0
1
CTL3
0
1
0
1
0
1
CTL4
0
CTL5
0
CTL6
0
1
Output frequency
96.0 kHz
19.2
9.6
4.8
3.2
2.4
1.6
0.8
Baud rate output
example (to/16)
6000 bits/s
1200
600
300
200
150
100
50
56
Note: Lower digits are omitted.