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參數(shù)資料
| 型號： | 935285129118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | LED DISPLAY DRIVER, PDSO28 |
| 封裝： | 4.40 MM, PLASTIC, MO-153, SOT361-1, TSSOP-28 |
| 文件頁數(shù)： | 18/54頁 |
| 文件大?。?/td> | 410K |
| 代理商： | 935285129118 |
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PCA9685_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 16 July 2009
25 of 50
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I2C-bus LED controller
7.3.6 SUBADR1 to SUBADR3, I2C-bus subaddress 1 to 3
Subaddresses are programmable through the I2C-bus. Default power-up values are E2h,
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 I2C-bus subaddress are valid. The LSB in SUBADRx
register is a read-only bit (0).
When SUBx is set to logic 1, the corresponding I2C-bus subaddress can be used during
either an I2C-bus read or write sequence.
7.3.7 ALLCALLADR, LED All Call I2C-bus address
The LED All Call I2C-bus address allows all the PCA9685s in the bus to be programmed
at the same time (ALLCALL bit in register MODE1 must be equal to 1 (power-up default
state)). This address is programmable through the I2C-bus and can be used during either
an I2C-bus read or write sequence. The register address can also be programmed as a
Sub Call.
Only the 7 MSBs representing the All Call I2C-bus address are valid. The LSB in
ALLCALLADR register is a read-only bit (0).
If ALLCALL bit = 0, the device does not acknowledge the address programmed in register
ALLCALLADR.
Table 8.
SUBADR1 to SUBADR3 - I2C-bus subaddress registers 0 to 3 (address 02h to 04h)
bit description
Legend: * default value.
Address
Register
Bit
Symbol
Access
Value
Description
02h
SUBADR1
7:1
A1[7:1]
R/W
1110 001*
I2C-bus subaddress 1
0
A1[0]
R only
0*
reserved
03h
SUBADR2
7:1
A2[7:1]
R/W
1110 010*
I2C-bus subaddress 2
0
A2[0]
R only
0*
reserved
04h
SUBADR3
7:1
A3[7:1]
R/W
1110 100*
I2C-bus subaddress 3
0
A3[0]
R only
0*
reserved
Table 9.
ALLCALLADR - LED All Call I2C-bus address register (address 05h) bit
description
Legend: * default value.
Address
Register
Bit
Symbol
Access
Value
Description
05h
ALLCALLADR
7:1
AC[7:1]
R/W
1110 000*
ALLCALL I2C-bus
address register
0
AC[0]
R only
0*
reserved
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