pca9635 NXP Semiconductors, pca9635 Datasheet - Page 6

• Manufacturer Part Number: pca9635
• Description: Pca9635 16-bit Fm I2c-bus Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
PCA9635_5
Product data sheet
7.1.1 Regular I
7.1 Device addresses
Table 2.
Refer to
Following a START condition, the bus master must output the address of the slave it is
accessing.
There are a maximum of 128 possible programmable addresses using the 7 hardware
address pins. Two of these addresses, Software Reset and LED All Call, cannot be used
because their default power-up state is ON, leaving a maximum of 126 addresses. Using
other reserved addresses, as well as any other Sub Call address, will reduce the total
number of possible addresses even further.
The I
internal pull-up resistors are incorporated on the hardware selectable address pins and
they must be pulled HIGH or LOW.
Remark: Reserved I
with:
Symbol
LED13
LED14
LED15
OE
A5
A6
SCL
SDA
V
Fig 3. Slave address
•
•
•
•
DD
‘reserved for future use’ I
slave devices that use the 10-bit addressing scheme (1111 0XX)
slave devices that are designed to respond to the General Call address (0000 000)
High-speed mode (Hs-mode) master code (0000 1XX)
2
C-bus slave address of the PCA9635 is shown in
Figure 1 “Block diagram of
2
Pin description for TSSOP28
C-bus slave address
Pin
20
21
22
23
24
25
26
27
28
Type
O
O
O
I
I
I
I
I/O
power supply
2
C-bus addresses must be used with caution since they can interfere
Rev. 05 — 22 March 2007
2
C-bus addresses (0000 011, 1111 1XX)
A6
A5
Description
LED driver 13
LED driver 14
LED driver 15
active LOW output enable
address input 5
address input 6
serial clock line
serial data line
supply voltage
hardware selectable
PCA9635”.
slave address
A4
…continued
A3
A2
A1
002aab319
A0
Figure
R/W
16-bit Fm+ I
3. To conserve power, no
PCA9635
2
© NXP B.V. 2007. All rights reserved.
C-bus LED driver
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