PCA9624 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet Rev. 4.1 — 18 January 2016 10 of 40
NXP Semiconductors
PCA9624
8-bit Fm+ I
2
C-bus 100 mA 40 V LED driver
7.3.1 Mode register 1, MODE1
[1] Bit 4 must be programmed with logic 0 for proper device operation.
[2] It takes 500 s max. for the oscillator to be up and running once SLEEP bit has been set to logic 0. Timings
on LEDn outputs are not guaranteed if PWMx, GRPPWM or GRPFREQ registers are accessed within the
500 s window.
[3] No blinking or dimming is possible when the oscillator is off.
7.3.2 Mode register 2, MODE2
[1] Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9624.
Applicable to registers from 02h (PWM0) to 08h (LEDOUT) only.
[2] Remark: If you change these bits from their default values, the device does not perform as expected.
Table 6. MODE1 - Mode register 1 (address 00h) bit description
Legend: * default value.
Bit Symbol Access Value Description
7 AI2 read only 0 Register Auto-Increment disabled.
1* Register Auto-Increment enabled.
6 AI1 read only 0* Auto-Increment bit 1 = 0.
1 Auto-Increment bit 1 = 1.
5 AI0 read only 0* Auto-Increment bit 0 = 0.
1 Auto-Increment bit 0 = 1.
4 SLEEP
[1]
R/W 0 Normal mode
[2]
.
1* Low-power mode. Oscillator off
[3]
.
3 SUB1 R/W 0* PCA9624 does not respond to I
2
C-bus subaddress 1.
1 PCA9624 responds to I
2
C-bus subaddress 1.
2 SUB2 R/W 0* PCA9624 does not respond to I
2
C-bus subaddress 2.
1 PCA9624 responds to I
2
C-bus subaddress 2.
1 SUB3 R/W 0* PCA9624 does not respond to I
2
C-bus subaddress 3.
1 PCA9624 responds to I
2
C-bus subaddress 3.
0 ALLCALL R/W 0 PCA9624 does not respond to LED All Call I
2
C-bus
address.
1* PCA9624 responds to LED All Call I
2
C-bus address.
Table 7. MODE2 - Mode register 2 (address 01h) bit description
Legend: * default value.
Bit Symbol Access Value Description
7 - read only 0* reserved
6 - read only 0* reserved
5 DMBLNK R/W 0* group control = dimming.
1 group control = blinking.
4 INVRT R/W 0* reserved; write must always be a logic 0
3 OCH R/W 0* outputs change on STOP command
[1]
1 outputs change on ACK
2 - R/W 1* reserved; write must always be a logic 1
[2]
1 - R/W 0* reserved; write must always be a logic 0
[2]
0 - R/W 1* reserved; write must always be a logic 1
[2]
