LP5562TMXSLASHNOPB datasheet(14/52 Pages) TI2

14 / 52 page

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16 32

48 64

96 112 128 144 160 176 192 208 224 240

100

LOG_EN = 1

LOG_EN = 0

CONTROL (DEC)

SVA-30197405

LP5562

SNVS820B – APRIL 2013 – REVISED DECEMBER 2016

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Figure 15. Logarithmic and Linear PWM Adjustment Curves

7.3.3 Program Execution Engines

Use of program execution engines is the other LED output PWM control method available in the LP5562. The

device has 3 program execution engines. These engines create PWM controlled lighting patterns to the mapped

LED outputs according to program codes developed by the user. Program coding is done using programming

commands (see Program Execution Engine Programming Commands.) Programs are loaded into SRAM memory

and engine control bits are used to run these programs autonomously. LED outputs can be mapped into these 3

engines with register 70h bit settings (see Table 3). The engines have different operation modes, program

execution states, and program counters. Each engine has its own section of the SRAM memory.

7.3.3.1 Program Execution Engine States

Engine program execution is controlled from ENABLE register (00h). There are four different states for each

engine, and these states are described in Table 6.

Table 6. ENABLE Register (00h)

NAME

BIT

DESCRIPTION

ENG1_EXEC

5:4

Engine 1 program execution

00b = Hold: Wait until current command is finished then stop while

EXEC mode is hold. PC can be read or written only in this mode.

01b = Step: Execute instruction defined by current Engine 1 PC value,

increment PC, and change ENG1_EXEC to 00b (Hold).

10b = Run: Start at program counter value defined by current Engine 1

PC value.

11b = Execute instruction defined by current Engine 1 PC value and

change ENG1_EXEC to 00b (Hold).

ENG2_EXEC

3:2

Engine 2 program execution

00b = Hold: Wait until current command is finished then stop while

EXEC mode is hold. PC can be read or written only in this mode.

01b = Step: Execute instruction defined by current Engine 2 PC value,

increment PC, and change ENG2_EXEC to 00b (Hold).

10b = Run: Start at program counter value defined by current Engine 2

PC value.

11b = Execute instruction defined by current Engine 2 PC value and

change ENG2_EXEC to 00b (Hold).

ENG3_EXEC

1:0

Engine 3 program execution

00b = Hold: Wait until current command is finished then stop while

EXEC mode is hold. PC can be read or written only in this mode.

01b = Step: Execute instruction defined by current engine 3 PC value,

increment PC, and change ENG3_EXEC to 00b (Hold).

10b = Run: Start at program counter value defined by current engine 3

PC value.

11b = Execute instruction defined by current engine 3 PC value and

change ENG3_EXEC to 00b (Hold).

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