SC667 datasheet(31/47 Pages) SEMTECH

31 / 47 page

SC667

Bank #3 Backlight Register (04h)

This register is used to set the current for the backlight

LEDs in bank #3 and to enable the lighting effect feature

for bank #3. These backlights can be turned off using the

backlight enable bits of registers 00h and 01h. Writing the

0mA value into this register will also turn off the back-

lights, but only if the blink and breathe effects are

disabled.

B3FEN Bit D5

This bit works in conjunction with the B1BEN bit of register

08h to set a lighting effect for bank #3. Figure 23 shows

the lighting effects which are enabled by the combination

of B3FEN and B3BEN. When fade is enabled, fading will

occur in bank #3 each time the bank #3 current is changed,

enabled, or disabled. Blink and breathe functions run in a

continuous loop when they are enabled.

B3BEN = 0

B3FEN = 0

B3BEN = 0

B3FEN = 1

B3BEN = 1

B3FEN = 0

B3BEN = 1

B3FEN = 1

Fade

No Light Effect

Breathe

Bank #3

Blink

Figure 23 — Bank #3 Lighting Effect

IB3_4 through IB3_0 [Bits D4:D0]

These bits are used to set the current for the backlight

LEDs in bank #3. All bank #3 enabled current sinks will

sink the same current as shown in Table 4.

Table 4 — Bank #3 Backlight Current

IB3_4 IB3_3 IB3_2 IB3_1 IB3_0

Backlight

Current (mA)

0.05

0.1

0.2

0.5

1.5

2.5

3.5

4.5

SC667 Datasheet(PDF) 31 Page - Semtech Corporation

SC667 Datasheet(HTML) 31 Page - Semtech Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Datasheet Download

Link URL