LP5523 datasheet(44/61 Pages) TI2

44 / 61 page

LP5523

SNVS550E – SEPTEMBER 2009 – REVISED JANUARY 2017

www.ti.com

Product Folder Links: LP5523

Submit Documentation Feedback

7.6.5 LED Mapping Instructions

These instructions define the engine-to-LED mapping. The mapping information is stored in a table, which is

stored in the SRAM (program memory of the LP5523). LP5523 has three program execution engines which can

be mapped to 9 LED drivers or to one GPO pin. One engine can control one or multiple LED drivers. There are

totally eleven instructions for the engine-to-LED-driver control: mux_ld_start, mux_map_start, mux_ld_end,

mux_sel,

mux_clr,

mux_map_next,

mux_map_prev,

mux_ld_next,

mux_ld_prev,

mux_ld_addr

and

mux_map_addr.

MUX_LD_START; MUX_LD_END

Mux_ld_start and mux_ld_end define the mapping table location in the memory.

NAME

VALUE (d)

DESCRIPTION

SRAM address

0-95

Mapping table start/end address

MUX_MAP_START

Mux_map_start defines the mapping table start address in the memory, and the first row of the table is activated

(mapped) at the same time.

NAME

VALUE (d)

DESCRIPTION

SRAM address

0-95

Mapping table start address

MUX_SEL

With mux_sel instruction one, and only one, LED driver (or the GPO-pin) can be connected to a program

execution engine. Connecting multiple LEDs to one engine is done with the mapping table. After the mapping

has been released from an LED, PWM register value still controls the LED brightness. If the mapping is released

from the GPO pin, serial bus control takes over the GPO state.

NAME

VALUE (d)

DESCRIPTION

LED select

0-16

0 = no drivers selected

1 = LED1 selected

2 = LED2 selected

...

9 = LED9 selected

16 = GPO

MUX_CLR

Mux_clr clears engine-to-driver mapping. After the mapping has been released from an LED, the PWM register

value still controls the LED brightness. If the mapping is released from the GPO pin, serial bus control takes over

the GPO state.

MUX_MAP_NEXT

This instruction sets the next row active in the mapping table each time it is called. For example, if the 2nd row is

active at this moment, after mux_map_next instruction call the 3rd row is active. If the mapping table end

address is reached, activation rolls to the mapping table start address next time when the mux_map_next

instruction is called. Engine does not push a new PWM value to the LED driver output before set_pwm or ramp

instruction is executed. If the mapping has been released from an LED, the value in the PWM register still

controls the LED brightness. If the mapping is released from the GPO pin, serial bus control takes over the GPO

state.

MUX_LD_NEXT

Similar than the mux_map_next instruction, but only the index pointer is set to point to the next row; that is, no

mapping is set, and the engine-to-LED-driver connection is not updated.

MUX_MAP_PREV

LP5523 датащи(PDF) 44 Page - Texas Instruments

LP5523 датащи(HTML) 44 Page - Texas Instruments

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 48 49 50 51 52 53 54 55 56 57 58 59 60 61

датащи скачать

ссылки URL