Dialog DA9026 Manual do utilizador - Página 9

Procurar online ou descarregar pdf Manual do utilizador para Placa-mãe Dialog DA9026. Dialog DA9026 15 páginas.

Imprimir página
User Guide - Preliminary
•
Fill the order with ascending numbers, from the
current position
•
Reset the whole order to all zeros.
•
Help – a brief description
•
Quit – no action

Timing Parameters

The parameters in this panel control the timing parameters
for the DA9026 module.
The Switching Time parameter controls the basic switching
time within the DA9026 device - i.e. it controls the switching
frequency which underlies the basic concept of the device.
5 bits are used to store this information and values are in
the range 7us to 2000us.
Figure 11. Timing parameters
The Base Duration Time takes one of the following values
[1ms, 2ms, 5ms, 10ms, 20ms, 32ms, 50ms, 100ms] and
controls the base time unit, which is the unit for the Duration
time and the Fade time.

Brightness Correction Parameters

The Brightness Correction Parameters enable the relative
brightness of tri-colored LEDs to be balanced. This is
necessary since the LEDs all have different characteristics
and setting all three colour components to the same values
does not produce a white display. The correct colour
balance may be achieved by careful modification of these
values. For the current tri-colored LEDs in use for the
Lightshow demo, the values in use are: 22, 15, 31
Control
Description
Parameter
Auto Shutdown
Controls automatically shut down to
'Idle Mode'
DCDC Control
Controls the DCDC
* keep permanently ON
* keep permanently OFF
* use automatic switching ON/OFF
Looping Control
Controls the number of loops that the
sequences will be run
Start/ Stop
Controls Starting/Stopping a pattern
Shut Down
Immediate shutdown of the DA9026
device into power save mode
Table 2. Control parameters
© Dialog Semiconductor 2005. All rights reserved.
DA9026 Evaluation Board
Figure 12. Brightness correction parameters

Control Parameters

This section of the panel controls the use of the Auto
Shutdown, DCDC usage, Loop control and Start/Stop and
Device Shutdown parameters. The section of the control
panel is as follows:
Figure 13. Control parameters
A description of the options is given in Table 2.
Values
0 = auto shutdown
1 = DA9026 always on
dcdc_off dcdc_on
0
1
0
0 = continuously
1 – 255 otherwise
0 = stop
1 = start
0 = normal mode
1 = shutdown
CONFIDENTIAL
Reg 0x0E
Control bit
3
2
1
1
0
0
-
0
8
DA9026-UG04-0705
DA9026
Reg 0x0D
-
-
Full eight bits
-
-
Page 9 of 15