pca9626 NXP Semiconductors, pca9626 Datasheet - Page 9

• Manufacturer Part Number: pca9626
• Description: 24-bit Fm+ I2c-bus 100 Ma 40 V Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA9626_1
Product data sheet
7.2 Control register
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 PCA9626, which will be
stored in the Control register.
The lowest 6 bits are used as a pointer to determine which register will be accessed
(D[5:0]). The highest bit is used as Auto-Increment Flag (AIF).
This bit along with the MODE1 register bit 5 and bit 6 provide the Auto-Increment feature.
Bit 6 of the Control register is not used.
When the Auto-Increment Flag is set (AIF = logic 1), the six 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.
Table 3.
[1]
Remark: Other combinations not shown in
111b) are reserved and must not be used for proper device operation.
AIF + AI[1:0] = 000b is used when the same register must be accessed several times
during a single I
LED. Data is overwritten each time the register is accessed during a write operation.
AIF + AI[1:0] = 100b is used when all the registers must be sequentially accessed, for
example, power-up programming.
AIF
0
1
1
1
1
Fig 6.
AI1 and AI0 come from MODE1 register.
AI1
0
0
0
1
1
reset state = 80h
Remark: The Control register does not apply to the Software Reset I
Control register
Auto-Increment options
[1]
AI0
0
0
1
0
1
2
C-bus communication, for example, changes the brightness of a single
[1]
Function
no Auto-Increment
Auto-Increment for all registers. D[5:0] roll over to 0h after the last register
26h is accessed.
Auto-Increment for individual brightness registers only. D[5:0] roll over to
2h after the last register (19h) is accessed.
Auto-Increment for global control registers and CHASE register. D[5:0] roll
over to 1Ah after the last register (1Ch) is accessed.
Auto-Increment for individual brightness registers; global control registers
and CHASE register. D[5:0] roll over to 2h after the last register (1Ch) is
accessed.
Rev. 01 — 2 June 2009
AIF
Auto-Increment Flag
Don't care
X
D5
D4
register address
Table 3
24-bit Fm+ I
D3
D2
(AIF + AI[1:0] = 001b, 010b, 011b and
D1
002aad610
2
C-bus 100 mA 40 V LED driver
D0
2
C-bus address.
PCA9626
© NXP B.V. 2009. All rights reserved.
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