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NXP Semiconductors
PCA9626
24-bit Fm+ I 2 C-bus 100 mA 40 V LED driver
AIF + AI[1:0] = 101b is used when the 16 LED drivers must be individually programmed
with different values during the same I 2 C-bus communication, for example, changing color
setting to another color setting.
AIF + AI[1:0] = 110b is used when the LED drivers must be globally programmed with
different settings during the same I 2 C-bus communication, for example, global brightness
or blinking change.
AIF + AI[1:0] = 111b is used when the 16 LED drivers must be individually programmed
with different values in addition to global programming.
Only the 6 least significant bits D[5:0] are affected by the AIF, AI1 and AI0 bits.
When the Control register is written, the register entry point determined by D[5:0] is the
first register that will be addressed (read or write operation), and can be anywhere
between 0h and 26h (as defined in Table 4 ). When AIF = 1, the Auto-Increment Flag is set
and the rollover value at which the register increment stops and goes to the next one is
determined by AIF, AI1 and AI2. See Table 3 for rollover values. For example, if MODE1
register bit AI1 = 0 and AI0 = 1 and if the Control register = 1001 0010, then the register
addressing sequence will be (in hexadecimal):
20 ? 21 ? … ? 26 ? 0 ? 1 ? 2 ? … ? 19 ? 02 ? 03 ? … ? 19 ? 02 … as long
as the master keeps sending or reading data.
7.3 Register definitions
Table 4.
Register summary [1][2]
Register number D5
D4
D3
D2
D1
D0
Name
Type
Function
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
14h
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
MODE1
MODE2
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
PWM8
PWM9
PWM10
PWM11
PWM12
PWM13
PWM14
PWM15
PWM16
PWM17
PWM18
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
read/write
Mode register 1
Mode register 2
brightness control LED0
brightness control LED1
brightness control LED2
brightness control LED3
brightness control LED4
brightness control LED5
brightness control LED6
brightness control LED7
brightness control LED8
brightness control LED9
brightness control LED10
brightness control LED11
brightness control LED12
brightness control LED13
brightness control LED14
brightness control LED15
brightness control LED16
brightness control LED17
brightness control LED18
PCA9626
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 6 September 2012
? NXP B.V. 2012. All rights reserved.
9 of 47
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