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參數(shù)資料
| 型號(hào)： | X95820WV14I-2.7 |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC XDCP DUAL 256TAP 10K 14-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 95 |
| 系列： | XDCP™ |
| 接片： | 256 |
| 電阻（歐姆）： | 10k |
| 電路數(shù)： | 2 |
| 溫度系數(shù)： | 標(biāo)準(zhǔn)值 ±45 ppm/°C |
| 存儲(chǔ)器類(lèi)型： | 非易失 |
| 接口： | I²C（設(shè)備位址） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 14-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-TSSOP |
| 包裝： | 管件 |
10
FN8212.2
July 18, 2006
All I2C interface operations must begin with a START
condition, which is a HIGH to LOW transition of SDA while
SCL is HIGH. The X95820 continuously monitors the SDA
and SCL lines for the START condition and does not
respond to any command until this condition is met (See
Figure 15). A START condition is ignored during the power
up sequence and during internal non-volatile write cycles.
All I2C interface operations must be terminated by a STOP
condition, which is a LOW to HIGH transition of SDA while
SCL is HIGH (See Figure 15). A STOP condition at the end
of a read operation, or at the end of a write operation to
volatile bytes only places the device in its standby mode. A
STOP condition during a write operation to a non-volatile
byte, initiates an internal non-volatile write cycle. The device
enters its standby state when the internal non-volatile write
cycle is completed.
An ACK, Acknowledge, is a software convention used to
indicate a successful data transfer. The transmitting device,
either master or slave, releases the SDA bus after
transmitting eight bits. During the ninth clock cycle, the
receiver pulls the SDA line LOW to acknowledge the
reception of the eight bits of data (See Figure 16).
The X95820 responds with an ACK after recognition of a
START condition followed by a valid Identification Byte, and
once again after successful receipt of an Address Byte. The
X95820 also responds with an ACK after receiving a Data
Byte of a write operation. The master must respond with an
ACK after receiving a Data Byte of a read operation
A valid Identification Byte contains 1010 as the four MSBs,
and the following three bits matching the logic values
present at pins A2, A1, and A0. The LSB in the Read/Write
bit. Its value is “1” for a Read operation, and “0” for a Write
operation (See Table 2).
TABLE 2. IDENTIFICATION BYTE FORMAT
1
0
1
0
A2
A1
A0
R/W
(MSB)
(LSB)
Logic values at pins A2, A1, and A0 respectively
SDA
SCL
START
DATA
STOP
STABLE
CHANGE
DATA
STABLE
FIGURE 15. VALID DATA CHANGES, START, AND STOP CONDITIONS
SDA Output from
Transmitter
SDA Output from
Receiver
8
1
9
START
ACK
SCL from Master
High Impedance
FIGURE 16. ACKNOWLEDGE RESPONSE FROM RECEIVER
S
t
a
r
t
S
t
o
p
Identification
Byte
Address
Byte
Data
Byte
A
C
K
Signals from the
Master
Signals from the
X95820
A
C
K
1
0
1
00
A
C
K
Write
Signal at SDA
00 0 0
A2A1A0
FIGURE 17. BYTE WRITE SEQUENCE
X95820
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