UPD168111 Datasheet, PDF (20/39 Pages) NEC – MICROSTEP DRIVER FOR DRIVING CAMERA LENS

µPD168111
Address 1
This register is used to set a chopping frequency that is the basis of PWM output. This register is also used to
test the internal circuitry of the IC.
bit
Df De Dd Dc Db Da D9 D8
Data
0
0
1 Test function
Note Pulse output function selection during EXT output
MSB
D7 D6 D5 D4 D3 D2
Note Chopping frequency
LSB
D1 D0
• Chopping frequency
A chopping method is employed for the output to drive the motor on a constant current. The chopping frequency
that is the basis of the output can be changed with data, so that the PWM output does not interfere with the other
signals.
The chopping frequency can be set in a range of 40 to 250 kHz by the data D0 to D5. Refer to the following table
for the set value.
D5……D0
000000
000001
:
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
010101
010110
010111
Chopping Frequency
(kHz)
0 (no pulse output)
0 (no pulse output)
:
0 (no pulse output)
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
D5……D0
011000
011001
011010
011011
011100
011101
011110
011111
100000
100001
100010
100011
100100
100101
100110
100111
101000
101001
101010
101011
Chopping Frequency
(kHz)
120
125
130
140
145
155
165
180
190
210
D5……D0
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
Chopping Frequency
(kHz)
225
250
20
Data Sheet S15865EJ1V0DS