LP5523 datasheet(37/56 Pages) TI1

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LP5523

www.ti.com

SNVS550D – SEPTEMBER 2009 – REVISED MAY 2013

Instruction Set

The LP5523 has three independent programmable execution engines. All the program execution engines have

their own program memory block allocated by the user. Note that in order to access program memory the

operation mode needs to be load program, at least for one of the three program execution engines. Program

execution is clocked with a 32.7 kHz clock. This clock can be generated internally or external 32 kHz clock can

be connected to CLK pin. Using external clock enables synchronization of LED timing to the external clock

signal.

Supported instruction set is listed in the tables below:

Table 4. LP5523 LED Driver Instructions

Bit

Inst.

[15]

[14]

[13]

[12]

[11]

[10]

[9]

[8]

[7]

[6]

[5]

[4]

[3]

[2]

[1]

[0]

pre-

ramp(1)

step time

sign

# of increments

scale

pre-

# of

ramp(2)

sign

step time

scale

increments

set_pwm(

PWM value

set_pwm(

PWM value

pre-

wait

time

scale

(1)

This opcode is used with numerical operands.

(2)

This opcode is used with variables.

(3)

This opcode is used with numerical operands.

Table 5. LP5523 LED Mapping Instructions

Bit

Inst.

Bit [9] Bit [8] Bit [7] Bit [6] Bit [5] Bit [4] Bit [3] Bit [2] Bit [1]

[15]

[14]

[13]

[12]

[11]

[10]

[0]

mux_ld_start

SRAM address 0-95

mux_map_start

SRAM address 0-95

mux_ld_end

SRAM address 0 - 95

mux_sel

LED select

mux_clr

mux_map_next

mux_map_prev

mux_ld_next

mux_ld_prev

mux_ld_addr

SRAM address 0-95

mux_map_addr

SRAM address 0-95

Table 6. LP5523 Branch Instructions(1)

Bit

Inst.

Bit [9] Bit [8] Bit [7] Bit [6] Bit [5] Bit [4] Bit [3] Bit [2] Bit [1] Bit [0]

[15]

[14]

[13]

[12]

[11]

[10]

rst

branch(2) 1

loop count

step number

branch(3) 1

step number

loop count

int

end

int

reset

(1)

X means do not care.

(2)

This opcode is used with numerical operands.

(3)

This opcode is used with variables.

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