NXP Semiconductors
PCA9626
24-bit Fm+ I 2 C-bus 100 mA 40 V LED driver
7.3.6 CHASE control
Table 10. CHASE - Chase pattern control register (address 1Ch) bit description
Legend: * default value.
Address
1Ch
Register
CHASE
Bit
7:0
Symbol
CHC[7:0]
Access
R/W
Value
0000 0000*
Description
CHASE register
CHASE is used to program the LED output ON/OFF pattern. The contents of the CHASE
register is used to enable one of the LED output patterns, as indicated in Table 11 .
By repeated, sequential access to this table via the CHASE register, a chase pattern,
for example, marquee effect, can be easily programmed with minimal number of
commands. Once the CHASE register is accessed, the data bytes that follow will be used
as an index value to pick the LED output patterns defined by Table 11 “ CHASE     sequence ” .
This register always updates on ACK. It is used to gate the OE signal at each of the LEDn
pins such that:
? OE = 1: all LEDs are off
? OE = 0: those LEDs corresponding to the ‘X’s in Table 11 are on
Any write to this register takes effect at the ACK.
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.
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