Ocean Optics USB4000 - 22-Pin Accessory Connector - Pin Definitions and Descriptions

C: Specifications
22-Pin Accessory Connector – Pin Definitions and
Descriptions
The following table contains information regarding the function of each pin in the USB4000’s 22-Pin
Accessory Connector:
Pin
#
Function Input/Output Description
1
V
CC
, V
USB
,
or 5V
IN
Input or
Output
Input power pin for USB4000 – When operating via USB, this pin
can power other peripherals – Ensure that peripherals comply with
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
SPI Master Out Slave In (MOSI) signal for communication to other
SPI peripherals
12 MISO Input
SPI Master In Slave Out (MISO) signal for communication to other
SPI peripherals
13
GPIO-
1(1P)*
Input/Output
General purpose software-programmable, digital input/output
(channel number)
14
GPIO-
0(2P)*
Input/Output
General purpose software-programmable, digital input/output
(channel number)
26 211-00000-000-02-0908