pca9952 NXP Semiconductors, pca9952 Datasheet - Page 9

• Manufacturer Part Number: pca9952
• Description: 16-channel Fm+ I 2c-bus 57 Ma Constant Current Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9952_PCA9955
Product data sheet
7.1.3 LED bit Sub Call I
7.2 Control register
Remark: The default LED All Call I
as a regular I
PCA9952/55s on the I
Remark: At power-up SUBADR1 identifies this device as a 16-channel driver.
See
Remark: The default LED Sub Call I
slave addresses as long as they are disabled.
Following the successful acknowledgement of the slave address, LED All Call address or
LED Sub Call address, the bus master will send a byte to the PCA9952/55, which will be
stored in the Control register.
The lowest 7 bits are used as a pointer to determine which register will be accessed
(D[6:0]). The highest bit is used as Auto-Increment Flag (AIF). The AIF is active by default
at power-up.
This bit along with the MODE1 register bit 5 and bit 6 provide the Auto-Increment feature.
When the Auto-Increment Flag is set (AIF = logic 1), the seven low order bits of the
Control register are automatically incremented after a read or write. This allows the user to
program the registers sequentially. Four different types of Auto-Increment are possible,
depending on AI1 and AI0 values of MODE1 register.
Fig 5.
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•
•
•
3 different I
Default power-up values:
– SUBADR1 register: ECh or 1110 110X
– SUBADR2 register: ECh or 1110 110X
– SUBADR3 register: ECh or 1110 110X
Programmable through I
At power-up, SUBADR1 is enabled while SUBADR2 and SUBADR3 I
addresses are disabled.
Section 7.3.9 “LED bit Sub Call I
reset state = 80h
Remark: The Control register does not apply to the Software Reset I
Control register
2
C-bus slave address since this address is enabled at power-up. All of the
2
All information provided in this document is subject to legal disclaimers.
C-bus addresses can be used
2
C-bus addresses
Rev. 1 — 2 December 2011
2
C-bus will acknowledge the address if sent by the I
16-channel Fm+ I
2
C-bus (volatile programming)
AIF D6
Auto-Increment Flag
2
C-bus address (E0h or 1110 000X) must not be used
2
2
C-bus addresses may be used as regular I
D5
C-bus addresses for PCA9952/55”
register address
D4
2
C-bus 57 mA constant current LED driver
D3
PCA9952; PCA9955
D2
D1
002aad850
D0
2
C-bus address.
© NXP B.V. 2011. All rights reserved.
2
for more detail.
2
C-bus
C-bus master.
2
C-bus
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