参数资料
| 型号： | ISL90843UIU1027Z-TK |
| 厂商： | Intersil |
| 文件页数： | 10/10页 |
| 文件大小： | 0K |
| 描述： | IC XDCP 256-TAP 50OHM 10-MSOP |
| 标准包装： | 1,000 |
| 系列： | XDCP™ |
| 接片： | 256 |
| 电阻（欧姆）： | 50k |
| 电路数： | 4 |
| 存储器类型： | 易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
9
FN8095.2
March 29, 2006
Write Operation
A Write operation requires a START condition, followed by a
valid Identification Byte, a valid Address Byte, a Data Byte,
and a STOP condition. After each of the three bytes, the
ISL90843 responds with an ACK. At this time, the device
enters its standby state (See Figure 13).
Read Operation
A Read operation consist of a three byte instruction followed
by one or more Data Bytes (See Figure 14). The master
initiates the operation issuing the following sequence: a
START, the Identification byte with the R/W bit set to “0”, an
Address Byte, a second START, and a second Identification
byte with the R/W bit set to “1”. After each of the three bytes,
the ISL90843 responds with an ACK. Then the ISL90843
transmits Data Bytes as long as the master responds with an
ACK during the SCL cycle following the eighth bit of each
byte. The master terminates the read operation (issuing a
NACK and a STOP condition) following the last bit of the last
Data Byte (See Figure 14).
The Data Bytes are from the registers indicated by an
internal pointer. This pointer initial value is determined by the
Address Byte in the Read operation instruction, and
increments by one during transmission of each Data Byte.
After reaching the memory location 03h the pointer “rolls
over” to 00h, and the device continues to output data for
each ACK received.
FIGURE 13. BYTE WRITE SEQUENCE
FIGURE 14. READ SEQUENCE
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 ISL90843
A
C
K
0
11
A
C
K
WRITE
SIGNAL AT SDA
00 0 0
A0
A1
0
0000
SIGNALS
FROM THE
MASTER
SIGNALS FROM
THE SLAVE
SIGNAL AT SDA
S
T
A
R
T
IDENTIFICATION
BYTE WITH
R/W=0
ADDRESS
BYTE
A
C
K
A
C
K
00
0
11
S
T
O
P
A
C
K
0
1
0
11
IDENTIFICATION
BYTE WITH
R/W=1
A
C
K
S
T
A
R
T
LAST READ
DATA BYTE
FIRST READ
DATA BYTE
A
C
K
0
00 0
0 0
0 A1 A0
A1A0
0
A
C
K
ISL90843
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