LP55231 datasheet(24/53 Pages) TI

24 / 53 page

LP55231

SNOSCR5 – MARCH 2013

www.ti.com

Table 3. Control Register Map (continued)

Hex

Read/Writ

Default Value

Bit(s)

Bit Mnemonic and Description

Address

After Reset

CURRENT

D9 CURRENT CONTROL

[7:0]

R/W

10101111

D9 output current control register. Default current is

17.5 mA (typ.)

RESERVED FOR FUTURE

2F TO 35

[7:0]

RESERVED FOR FUTURE USE

USE

VARIABLE_D_SEL

[7]

R/W

0xxxxxxx

Variable D source selection

EN_AUTO_INCR

[6]

R/W

x1xxxxxx

Serial bus address auto increment enable

POWERSAVE_EN

[5]

R/W

xx0xxxxx

Powersave mode enable

CP_MODE

MISC

[4:3]

R/W

xxx00xxx

Charge pump gain selection

PWM_PS_EN

[2]

R/W

xxxxx0xx

PWM cycle powersave enable

CLK_DET_EN

[1]

R/W

xxxxxx0x

External clock detection

INT_CLK_EN

[0]

R/W

xxxxxxx0

Clock source selection

ENGINE1 PC

[6:0]

R/W

x0000000

Program counter for engine 1

ENGINE2 PC

[6:0]

R/W

x0000000

Program counter for engine 2

ENGINE3 PC

[6:0]

R/W

x0000000

Program counter for engine 3

LEDTEST_MEAS_DONE

[7]

0xxxxxxx

Indicates when the LED test measurement is done.

MASK_BUSY

[6]

x1xxxxxx

Mask bit for interrupts generated by

STARTUP_BUSY or ENGINE_BUSY.

STARTUP_BUSY

[5]

xx0xxxxx

This bit indicates that the startup sequence is

running.

ENGINE_BUSY

[4]

xxx0xxxx

This bit indicates that a program execution engine is

STATUS/INTERRUPT

clearing internal registers.

EXT_CLK_USED

[3]

xxxx0xxx

Indicates when external clock signal is in use.

ENG1_INT

[2]

xxxxx0xx

Interrupt bit for program execution engine 1

ENG2_INT

[1]

xxxxxx0x

Interrupt bit for program execution engine 2

ENG3_INT

[0]

xxxxxxx0

Interrupt bit for program execution engine 3

INT_CONF

[2]

R/W

xxxxx0xx

INT pin can be configured to function as a GPO with

this bit

INT/GPO

INT_GPO

[0]

R/W

xxxxxxx0

GPO pin control for INT pin when INT_CONF is set

"1"

VARIABLE

[7:0]

R/W

00000000

Global 8-bit variable

RESET

[7:0]

R/W

00000000

Writing 11111111 into this register resets the

LP55231

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