Development Board LEDs
37
Development Board LEDs
The development board contains 25 LEDs that are labeled CR1 through CR25. The following table
lists and describes the LEDs.
Development Board LED Descriptions
Board
Label
Description
State
Indication
CR1
CR2
TXD, Secondary Serial Port Yellow
TXD, Secondary Serial Port Yellow
On Logic 1 on TTL, mark, -V on line side
On Logic 1 on TTL, mark, -V on line side
CR3
CR4
RXD, Secondary Serial Port Yellow
RXD, Secondary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side
CR5
CR6
DCD, Primary Serial Port Yellow
DCD, Primary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side
CR7
CR8
DSR, Primary Serial Port Yellow
DSR, Primary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side
CR9
CR10
CTS, Primary Serial Port Yellow
CTS, Primary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side
CR11
CR12
RXD, Primary Serial Port
RXD, Primary Serial Port
On Logic 1 on TTL, mark, -V on line side
On Logic 1 on TTL, mark, -V on line side
CR13
CR14
DTR, Primary Serial Port Yellow
DTR, Primary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side
CR15
CR16
RTS, Primary Serial Port Yellow
RTS, Primary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side
CR17
CR18
TXD, Primary Serial Port Yellow
TXD, Primary Serial Port Green
On Logic 1 on TTL, mark, -V on line side
On Logic 0 on TTL, space, +V on line side