TS-7400/TS-9441 MANUAL
LEDS, JUMPERS AND BUTTONS
7 LEDS, JUMPERS AND BUTTONS
7.1 Status LEDs
The
TS-7400
has two LEDs (one Red and one Green) available for user software. These
LEDs may be used for diagnostics, status messages, and simple output. When power is
first supplied to the
TS-7400
, both LEDs are immediately turned on under hardware
control. Once the processor begins execution, the LEDs are turned off, and then flashed
on and off again briefly. After booting is complete, these LEDs can be used for user
applications.
The RED and Green LEDs can be controlled at physical address location
0x8084_0020
.
Bit 1 is the Red LED and bit 0 is the Green LED. A Logic “1” turns the LED on.
7.2 Buttons
The Reset button on the TS-9441 can be used to cycle power on the
TS-7400
.
7.3 Jumpers
There are 2 jumpers on the TS-9441, labeled Write En and Boot. The Boot jumper is
used to recover a bricked TS-7400 by booting from the TS-9441. When the Write Enable
jumper is installed, it is possible to write to the TS-9441.
© May, 2010 www.embeddedARM.com 39
