TLC59208F_1 Datasheet, PDF (12/29 Pages) Texas Instruments – 8-BIT FM+ I2C BUS LED DRIVER

TLC59208F
SCLS715 – MARCH 2009 .................................................................................................................................................................................................. www.ti.com
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 TLC59208F, which will be stored in the Control register. The lowest 5 bits
are used as a pointer to determine which register will be accessed (D[4:0]). The highest 3 bits are used as
Auto-Increment flag and Auto-Increment options (AI[2:0]).
Auto-Increment
Flag
Register Address
AI2 AI1 AI0 D4 D3 D2 D1 D0
Auto-Increment Options
Figure 7. Control Register
When the Auto-Increment flag is set (AI2 = logic 1), the five 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 2. Auto-Increment Options⁽¹⁾
AI2
AI1
AI0
DESCRIPTION
0
0
0
No auto-increment
1
0
0
Auto-increment for all registers. D[4:0] roll over to '0 0000' after the last register ('1 0001') is
accessed.
1
0
1
Auto-increment for individual brightness registers only. D[4:0] roll over to '0 0010' after the last
register ('0 1001') is accessed.
1
1
0
Auto-increment for global control registers only. D[4:0] roll over to '0 1010' after the last register
('0 1011') is accessed.
1
1
1
Auto-increment for individual and global control registers only. D[4:0] roll over to '0 0010' after
the last register ('0 1011') is accessed.
(1) Other combinations not shown in Table 2 (A1[2:0] = 001, 010, and 011) are 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 I²C bus
communication, for example, changes the brightness of a single LED. Data 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 I²C bus communication, for example, changing color 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
I²C bus communication, for example, global brightness or blinking change.
AI[2:0] = 111 is used when individually and global changes must be performed during the same I²C bus
communication, for example, changing color and global brightness at the same time.
Only the 5 least significant bits D[4:0] are affected by the AI[2:0] bits.
When Control register is written, the register entry point determined by D[4:0] is the first register that will be
addressed (read or write operation), and can be anywhere between 0 0000 and 1 0001 (as defined in
LINKTOTABLE3). When AI[2] = 1, the Auto-Increment flag is set and the rollover value at which the point where
the register increment stops and goes to the next one is determined by AI[2:0]. See for rollover values. For
example, if the Control register = 1110 1100 (ECh), then the register addressing sequence will be (in hex):
04 →… → 11 → 02 →… → 11 → 02 →… → 11 as long as the master keeps sending or reading data.
Register Descriptions
Table 3 describes the registers in the TLC59208F.
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