參數(shù)資料
型號(hào)： 935287058118
廠商： NXP SEMICONDUCTORS
元件分類： 顯示驅(qū)動(dòng)器
英文描述： LED DISPLAY DRIVER, PQCC28
封裝： 6 X 6 MM, 0.85 MM HIGHT, PLASTIC, MO-220, SOT788-1, HVQFN-28
文件頁(yè)數(shù)： 27/54頁(yè)
文件大小： 410K
代理商： 935287058118
PCA9685_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 16 July 2009
33 of 50
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I2C-bus LED controller
(1) In this example, several PCA9685s are used and the same sequences (A) and (B) above are sent to each of them.
(2) Acknowledge from all the slave devices congured for the new LED All Call I2C-bus address in sequence (B).
Fig 25. LED All Call I2C-bus address programming and LED All Call sequence example
A5 A4 A3 A2 A1 A0
0
A
S
1
slave address
START condition
R/W
acknowledge
from slave
002aad192
0
control register
A
acknowledge
from slave
MODE1
register selection
0
1
0
1
0
data for MODE1 register
P
STOP
condition
A
acknowledge
from slave
A5 A4 A3 A2 A1 A0
0
A
S
1
slave address
START condition
R/W
acknowledge
from slave
0
1
0
1
0
control register
A
acknowledge
from slave
ALLCALLADR
register selection
0
1
0
1
0
1
X
1
new LEDALLCALL I2C-bus address
P
STOP
condition
A
acknowledge
from slave
sequence (A)(1)
sequence (B)(1)
0
1
0
1
0
1
0
A
S
1
LEDALLCALL I2C-bus address
START condition
R/W
acknowledge(2) from all the
devices configured for the new
LEDALLCALL I2C-bus address
1
0
1
0
1
control register
A
acknowledge(2)
from slave
ALL_LED_ON_L
register selection
0
data for control register
ALL_LED_ON_L
P
STOP
condition
A
acknowledge(2)
from slave
sequence (C)
(cont.)
0
A
0
A
acknowledge(2)
from slave
data for ALL_LED_OFF_L
control register
0
1
0
A
acknowledge(2)
from slave
ALL_LED_ON_H
control register
acknowledge(2)
from slave
AI on
enable ALL CALL
ALL_LED_OFF_H
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