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| 型號： | TPS2459RHBR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封裝： | PLASTIC, QFP-32 |
| 文件頁數(shù)： | 28/44頁 |
| 文件大小： | 983K |
| 代理商： | TPS2459RHBR |
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PRODUCTPREVIEW
TPS2459 I
2C Interface
SLUS917 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com
The TPS2459 digital interface meets the specifications for an I2C bus operating in the high-speed mode. The
interface to recognize any one of 27 separate I2C addresses can be configured using the A0, A1, and A2 pins
(Table 14 I2C Addressing). These pins accept any of three distinct voltage levels. Connecting a pin to ground
generates a low level (L). Connecting a pin to VINT generates a high level (H). Leaving a pin floating generates a
no-connect level (NC).
Table 14. I2C Addressing
EXTERNAL PINS
I2C (DEVICE) ADDRESS
A2
A1
A0
DEC
HEX
BINARY
L
8
1000
L
NC
9
1001
L
H
10
0A
1010
L
NC
L
11
0B
1011
L
NC
12
0C
1100
L
NC
H
13
0D
1101
L
H
L
14
0E
1110
L
H
NC
15
0F
1111
L
H
16
10
10000
NC
L
17
11
10001
NC
L
NC
18
12
10010
NC
L
H
19
13
10011
NC
L
20
14
10100
NC
21
15
10101
NC
H
22
16
10110
NC
H
L
23
17
10111
NC
H
NC
24
18
11000
NC
H
25
19
11001
H
L
26
1A
11010
H
L
NC
27
1B
11011
H
L
H
28
1C
11100
H
NC
L
29
1D
11101
H
NC
30
1E
11110
H
NC
H
31
1F
11111
H
L
32
20
100000
H
NC
33
21
100001
H
34
22
100010
The I2C hardware interface consists of two wires known as serial data (SDA) and serial clock (SCL). The
interface is designed to operate from a nominal 3.3-V supply. SDA is a bidirectional wired-OR bus that requires
an external pullup resistor, typically a 2.2-k
resistor connected from SDA to the 3.3-V supply.
The I2C protocol assumes one device on the bus acts as a master and another device acts as a slave. The
TPS2459 supports only slave operation with two basic functions called register write and register read.
34
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS2459
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