Rainbow-electronics MAX6948B Manual do Utilizador descarregar pdf (Página 10)

High-Efficiency PWM LED Driver with Boost

Converter and Five Constant-Current GPIO Ports

MAX6948B

The MAX6948B contains 25 internal registers (Table 1).

Registers 0x00 to 0x15 control ports P0–P4 and remain

compatible with the MAX6946/MAX6947 port expanders.

integrated boost converter. Register 0x22 conveys the

boost-converter status.

Table 1. Register Address Map and Autoincrement Address

ADDRESS

CODE (hex)

AUTO-INCREMENT

ADDRESS (hex)

READ/

WRITE

FUNCTION

DESCRIPTION

0x00 0x01 R/W P0 Port P0 I/O control and PWM settings

0x01 0x02 R/W P1 Port P1 I/O control and PWM settings

0x02 0x03 R/W P2 Port P2 I/O control and PWM settings

0x03 0x04 R/W P3 Port P3 I/O control and PWM settings

0x04 0x10 R/W P4 Port P4 I/O control and PWM settings

0x05 — — Reserved —

0x06 — — Reserved —

0x07 — — Reserved —

0x08 — — Reserved —

0x09 — — Reserved —

0x0A 0x10 R/W

Group control

(P0–P4)

Write: Simultaneously sets I/O and PWM settings for

ports P0–P4

Read: Reads contents of address 0x00

0x0B 0x10 R/W

Group control

(P0, P1)

Write: Simultaneously sets I/O and PWM settings for

ports P0, P1

Read: Reads contents of address 0x00

0x0C 0x10 R/W

Group control

(P2, P3, P4)

Write: Simultaneously sets I/O and PWM settings for

ports P2, P3, P4

Read: Reads contents of address 0x00

0x0D 0x10 — Reserved —

0x0E 0x0E Read only Port input Reads GPIO input values

0x0F — — Reserved —

0x10 0x11 R/W Configuration

Half-/full-boost current, reset options, PWM stagger,

start/stop status, reset run, shutdown setting

0x11 0x12 R/W Ramp-down Port ramp-down and hold-off settings

0x12 0x13 R/W Ramp-up Port ramp-up setting

0x13 0x14 R/W Output current Port half-/full-current settings

0x14 — — Reserved —

0x15 0x10 R/W Global current Port maximum current setting

0x20 0x21 R/W

Boost PWM

(MSB)

Boost circuit LED PWM setting (MSB)

0x21 — R/W Boost PWM (LSB) Boost circuit LED PWM setting (LSB)

0x22 — R/W Boost status Boost circuit status and standby setting

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 27 28

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX6948B Manual do Utilizador Página 10

Comentários a estes Manuais

Manuais e produtos relacionados com Software Rainbow-electronics MAX6948B