SPPOSC FREQUENCYDEVICES [Frequency Devices, Inc.], SPPOSC Datasheet - Page 2

• Manufacturer Part Number: SPPOSC
• Manufacturer: FREQUENCYDEVICES [Frequency Devices, Inc.]

(Low Distortion) 1 Hz to 102.4 kHz
8 or 9-Bit Frequency Selectable
Frequency Selection Data Port
Data Format
•
•
Bit Weighting (Binary Coded)
D
D
Frequency: 256:1 (8-bit dual),
____________________________________________
1. The frequency selection data word bus consists of
2. For dual Channel 8-Bit programming D
3. For an 8-bit dual channel unit, the Program enable
4. The D
D
Enable/Latch
D
Ch Sel
D
Frequency
Select
9
8
0
7
0
1784 Chessie Lane, Ottawa, IL 61350 • Tel: [phone] • FAX: [phone]
to D
or D
Logic “0”
Logic “1”
D
programming.
Select and requires a minimum of 21 µsecs set-up
time at a logic “1”, 5volts for channel 2 or logic “0”, 0
volts, for Channel 1
or “Latch pin” is D
this pin must be pulled to a logic high “1” or 5 volts.
If the pin is low, a frequency change will not be read
and the channels will continue to run the previous
values.
New frequency selection data must be present or
updated at the time Channel select occurs to be
valid. The Program enable or “Latch” pin must be
high. While the latch pin is high, the Frequency data
must remain on the bus until the user applies the
next frequency change. The pins do not float during
programming! The frequency ports are polled by the
system every 21 µseconds. Within 21 µsecs of
programming, if the latch goes low, the programmed
values are retained and the pins may float.
0
to D
7
8
or 512:1 (9-bit single)
(for 9-bits)
0
7
– D
for 8-bit programming and D
9
bus data are checked simultaneously.
e-mail: [e-mail] • Web Address: http://www.freqdev.com
21 µsecs min
9
. To enable a program change,
0VDC Min – 2VDC Max
3.5VDC Min – 5Vdc Max
LSB
MSB
Tsu
DATA VALID
0
to D
8
is Channel
8
for 9-bit
2
MSB
MSB
D
2
0
0
0
0
0
0
0
0
1
D
2
7
7
0
0
0
0
0
0
0
0
0
1
8
8
D
---
2
0
0
0
0
0
0
0
1
1
---
D
2
0
0
0
0
0
0
0
0
1
1
6
6
7
7
9-Bit Programming Table
8-Bit Programming Table
D
---
2
D
---
2
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
1
1
1
6
5
6
5
Oscillators: Dual Channel
D
---
2
0
0
0
0
0
0
1
1
1
1
D
---
2
5
5
0
0
0
0
0
1
1
1
1
4
4
D
---
2
0
0
0
0
0
1
1
1
1
1
4
4
D
---
2
0
0
0
0
1
1
1
1
1
3
3
SPPOSC Series
D
---
2
0
0
0
0
1
1
1
1
1
1
3
3
D
---
2
0
0
0
1
1
1
1
1
1
2
2
D
---
2
0
0
0
1
1
1
1
1
1
1
2
2
D
& Quadrature
---
2
0
0
1
1
1
1
1
1
1
D
1
---
2
1
0
0
1
1
1
1
1
1
1
1
1
1
LSB
LSB
D
2
D
0
1
1
1
1
1
1
1
1
2
0
1
1
1
1
1
1
1
1
1
0
0
0
0
2” X 2”
Frequency
Frequency
f
f
f
f
f
Weight
Weight
Corner
Corner
max
max
f
f
f
max
max
max
f
f
f
max
max
max
f
f
f
max
max
max
f
f
f
max
max
max
max
max
max
f
f
Bit
Bit
max
max
f
f
/256
/128
/512
/256
/128
c
c
/64
/32
/16
/64
/32
/16
/8
/4
/2
/8
/4
/2