pca9685 NXP Semiconductors, pca9685 Datasheet - Page 25

• Manufacturer Part Number: pca9685
• Description: 16-channel, 12-bit Pwm Fm+ I 2c-bus Led Controller
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9685_1
Product data sheet
7.3.6 SUBADR1 to SUBADR3, I
7.3.7 ALLCALLADR, LED All Call I
Table 8.
Legend: * default value.
Subaddresses are programmable through the I
E4h, E8h, and the device(s) will not acknowledge these addresses right after power-up
(the corresponding SUBx bit in MODE1 register is equal to 0).
Once subaddresses have been programmed to their right values, SUBx bits need to be
set to logic 1 in order to have the device acknowledging these addresses (MODE1
register).
Only the 7 MSBs representing the I
register is a read-only bit (0).
When SUBx is set to logic 1, the corresponding I
either an I
Table 9.
Legend: * default value.
The LED All Call I
at the same time (ALLCALL bit in register MODE1 must be equal to 1 (power-up default
state)). This address is programmable through the I
an I
Sub Call.
Only the 7 MSBs representing the All Call I
ALLCALLADR register is a read-only bit (0).
If ALLCALL bit = 0, the device does not acknowledge the address programmed in register
ALLCALLADR.
Address
02h
03h
04h
Address
05h
2
C-bus read or write sequence. The register address can also be programmed as a
2
Register
SUBADR1
SUBADR2
SUBADR3
Register
ALLCALLADR
SUBADR1 to SUBADR3 - I
bit description
ALLCALLADR - LED All Call I
description
C-bus read or write sequence.
2
C-bus address allows all the PCA9685s in the bus to be programmed
Rev. 01 — 24 July 2008
Bit
7:1
0
7:1
0
7:1
0
Bit
7:1
0
2
C-bus subaddress 1 to 3
Symbol
A1[7:1]
A1[0]
A2[7:1]
A2[0]
A3[7:1]
A3[0]
Symbol
AC[7:1]
AC[0]
2
16-channel, 12-bit PWM Fm+ I
C-bus address
2
2
C-bus subaddress are valid. The LSB in SUBADRx
C-bus subaddress registers 0 to 3 (address 02h to 04h)
2
C-bus address register (address 05h) bit
Access Value
R/W
R only
R/W
R only
R/W
R only
2
Access Value
R/W
R only
C-bus address are valid. The LSB in
2
C-bus. Default power-up values are E2h,
2
C-bus subaddress can be used during
2
1110 001*
1110 010*
1110 100*
C-bus and can be used during either
1110 000*
0*
0*
0*
0*
Description
I
reserved
I
reserved
I
reserved
2
2
2
Description
ALLCALL I
address register
reserved
C-bus subaddress 1
C-bus subaddress 2
C-bus subaddress 3
2
C-bus LED controller
PCA9685
© NXP B.V. 2008. All rights reserved.
2
C-bus
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