pca9633 NXP Semiconductors, pca9633 Datasheet - Page 8

• Manufacturer Part Number: pca9633
• Description: Pca9633 4-bit Fm+ I2c-bus Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
PCA9633_3
Product data sheet
Fig 8. Slave address
1
a. 8-pin version
1
slave address
0
7.1.1 Regular I
7.1.2 LED All Call I
fixed
0
7.1 Device addresses
0
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 subcall 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 (10-pin and 16-pin versions).
Remark: For the 16-pin version, reserved I
since they can interfere with:
The last bit of the address byte defines the operation to be performed. When set to logic 1
a read is selected, while a logic 0 selects a write operation.
See
1
•
•
•
•
•
•
•
‘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).
Default power-up value (ALLCALLADR register): E0h or 1110 000
Programmable through I
At power-up, LED All Call I
E0h (R/W = 0) or E1h (R/W = 1) is sent by the master.
002aab318
Section 7.3.8 “LED All Call I
2
0
C-bus slave address of the PCA9633 is shown in
R/W
Figure 1 “Block diagram of
2
C-bus slave address
2
C-bus address
1
b. 10-pin version
Rev. 03 — 20 December 2006
1
fixed
slave address
0
2
2
C-bus (volatile programming)
C-bus addresses (0000 011, 1111 1XX)
2
0
C-bus address is enabled. PCA9633 sends an ACK when
2
C-bus address, ALLCALLADR”
0
PCA9633”.
selectable
hardware
A1
002aab295
A0
2
C-bus addresses must be used with caution
R/W
Figure
A6
c. 16-pin version
4-bit Fm+ I
A5
hardware selectable
8. To conserve power, no
slave address
A4
for more detail.
A3
PCA9633
2
© NXP B.V. 2006. All rights reserved.
C-bus LED driver
A2
A1
002aab319
A0
R/W
8 of 42