pca9685 NXP Semiconductors, pca9685 Datasheet - Page 4
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pca9685
Manufacturer Part Number
pca9685
Description
16-channel, 12-bit Pwm Fm+ I 2c-bus Led Controller
Manufacturer
NXP Semiconductors
Datasheet
1.PCA9685.pdf
(50 pages)
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5. Block diagram
PCA9685_1
Product data sheet
Fig 1.
EXTCLK
SCL
SDA
V
V
OE
DD
SS
Remark: Only one LED output shown for clarity.
Block diagram of PCA9685
PCA9685
OSCILLATOR
25 MHz
INPUT FILTER
POWER-ON
PRESCALE
RESET
SWITCH
CLOCK
BRIGHTNESS
REGISTER X
A0
CONTROL
PWM
Rev. 01 — 24 July 2008
A1
CONTROL
A2
I
2
C-BUS
A3
16-channel, 12-bit PWM Fm+ I
A4
A5
'0' – permanently OFF
'1' – permanently ON
REGISTER
SELECT
STATE
LED
CONTROL
MUX/
2
C-bus LED controller
PCA9685
© NXP B.V. 2008. All rights reserved.
V
DD
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