User`s manual

Cerebus® User’s Manual
Revision 13.00 / LB-0028 Page 14
Figure 6 - Digital In Pin Diagram
5) Serial I/O: The port is an RS232 DB9 digital input/output port. The pin diagram is shown below. Currently, the
software only supports this port as an input. Pin 2 is “Receive Data”, pin 3 is “Transmit Data”, and pin 5 is “Ground”.
The configuration of the port is: Baud rate: 115200, Data bits: 8, Parity: none, Stop bits: 1, Flow control: disabled.
Figure 7 - Serial I/O Pin Diagram
6) Analog Outputs: Four ±5.0 V analog output BNC connectors can be used to send monitoring signals or stimulus
waveforms to other connectors.
7) Audio Output: The system sends a ±1 V line-level audio signal of the selected data channel to two BNC ports and one
3.5mm female stereo audio connector simultaneously.
8) Digital Outputs: Four single-bit digital BNC outputs can be programmed for monitoring or timing functions. These
ports can be setup to send a TTL signal if spike activity is detected on any particular neural channel. They can also be
configured to output a digital pulse train at a user-defined frequency and duty cycle. Digital Output 1 can also be used
for syncing external equipment by sending a unique pulse every 14 seconds. The entire sync pattern will repeat every
hour. See Figure 41 for more details.
9) Sync Port: A synchronization pulse can be set as an optional line to inform external equipment when the NSP neural
signal inputs and front panel ports are scanned. It is active on the rising edge of the signal.
10) Fiber-optic Link: This port connects to the Amplifier using a fiber-optic cable. An LED to the right of the connector
turns green when a link is established and turns red when the link is broken.
11) Synchronization Port: This DB9 port is located on the back of the NSP and it is used to synchronize two NSPs. The
synchronization occurs automatically as Central runs on both computers, if the sync cable (Blackrock Part# 5584) is
properly connected between two NSPs. Some models may not have this port. To add synchronization capability to your
NSP, please contact Blackrock Microsystems support at [e-mail]