Ocean Optics USB2000+ Install User Manual
Page 27
B: Specifications
270-00000-000- 02-201107
21
Pin #
Function
Input/Output
Description
5V
IN
Output
USB specifications
2
RS232 Tx
Output
RS232 transmit signal – Communicates with a computer over DB9
Pin 2
3
RS232 Rx
Input
RS232 receive signal – Communicates with a computer over DB9
Pin 3
4
Lamp Enable
Output
TTL signal driven Active HIGH when the Lamp Enable command
is sent to the spectrometer
5
Continuous
Strobe
Output
TTL output signal used to pulse a strobe – Divided down from the
master clock signal
6
Ground
Input/Output
Ground
7
External
Trigger In
Input
TTL input trigger signal – See External Triggering Options
document for info
8
Single Strobe
Output
TTL output pulse used as a strobe signal – Has a programmable
delay relative to the beginning of the spectrometer integration
period
9
I
2
C SCL
Input/Output
The I
2
C clock signal for communications to other I
2
C peripherals.
10
I
2
C SDA
Input/Output
The I
2
C Data signal for communications to other I
2
C peripherals.
11
MOSI
Output
The SPI Master Out Slave In (MOSI) signal for communications to other
SPI peripherals
12
MISO
Input
The SPI Master In Slave Out (MISO) signal for communications to other
SPI peripherals
13
GPIO-1
Input/Output
Master clock
14
GPIO-0
Input/Output
Base clock
15
GPIO-3
Input/Output
Integration clock
16
GPIO-2
Input/Output
Reserved
17
GPIO-5
Input/Output
Acquire spectra (Read Enable)
18
GPIO-4
Input/Output
Reserved
19
GPIO-7
Input/Output
SH CCD pin
20
GPIO-6
Input/Output
ICG CCD pin