pca9633 NXP Semiconductors, pca9633 Datasheet - Page 10

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

NXP Semiconductors
PCA9633_3
Product data sheet
When the Auto-Increment flag is set (AI2 = 1), the four 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.
Table 6.
Remark: Other combinations not shown in
reserved and must not be used for proper device operation.
AI[2:0] = 000 is used when the same register must be accessed several times during a
single I
is overwritten each time the register is accessed during a write operation.
AI[2:0] = 100 is used when all the registers must be sequentially accessed, for example,
power-up programming.
AI[2:0] = 101 is used when the four LED drivers must be individually programmed with
different values during the same I
setting to another color setting.
AI[2:0] = 110 is used when the LED drivers must be globally programmed with different
settings during the same I
blinking change.
AI[2:0] = 111 is used when individual and global changes must be performed during the
same I
same time.
Only the 4 least significant bits D[3:0] are affected by the AI[2:0] bits.
AI2
0
1
1
1
1
Fig 10. Control register
2
2
C-bus communication, for example, changing a color and global brightness at the
AI1
0
0
0
1
1
C-bus communication, for example, changes the brightness of a single LED. Data
reset state = 80h
Remark: The Control register does not apply to the Software Reset I
Auto-Increment options
AI0
0
0
1
0
1
Rev. 03 — 20 December 2006
Function
no Auto-Increment
Auto-Increment for all registers. D3, D2, D1, D0 roll over to ‘0000’ after
the last register (1100) is accessed.
Auto-Increment for individual brightness registers only. D3, D2, D1, D0
roll over to ‘0010’ after the last register (0101) is accessed.
Auto-Increment for global control registers only. D3, D2, D1, D0 roll over
to ‘0110’ after the last register (0111) is accessed.
Auto-Increment for individual and global control registers only. D3, D2,
D1, D0 roll over to ‘0010’ after the last register (0111) is accessed.
2
C-bus communication, for example, global brightness or
AI2 AI1 AI0
Auto-Increment flag
Auto-Increment options
2
C-bus communication, for example, changing color
0
Table 6
D3
register address
D2
(AI[2:0] = 001, 010, and 011) are
D1
002aab296
D0
4-bit Fm+ I
2
C-bus address.
PCA9633
2
© NXP B.V. 2006. All rights reserved.
C-bus LED driver
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