参数资料
| 型号： | ISL59911IRZ |
| 厂商： | Intersil |
| 文件页数： | 5/17页 |
| 文件大小： | 0K |
| 描述： | IC RCVR/EQUALZR TRPL DIFF 32QFN |
| 标准包装： | 60 |
| 类型： | 接收器 |
| 驱动器/接收器数： | 0/3 |
| 规程： | 双绞线 |
| 电源电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x6） |
| 包装： | 管件 |
ISL59911
13
FN7548.0
September 2, 2011
ISL59911 Serial Communication
Overview
The ISL59911 uses the I2C serial bus protocol for
communication with its host (master). SCL is the Serial Clock
line, driven by the host, and SDA is the Serial Data line, which can
be driven by all devices on the bus. SDA is open drain to allow
multiple devices to share the same bus simultaneously.
Communication is accomplished in three steps:
1. The host selects the ISL59911 it wishes to communicate
with.
2. The host writes the initial ISL59911 Configuration Register
address it wishes to write to or read from.
3. The host writes to or reads from the ISL59911s Configuration
Register. The ISL59911s internal address pointer auto
increments, so to read registers 0x00 through 0x1B, for
example, one would write 0x00 in step 2, then repeat step
three 28 times, with each read returning the next register
value.
The ISL59911 has a 7-bit address on the serial bus,
10001<a1><a0>b, where 10001 is fixed and a0 and a1 are the
state of the ADDR0 and ADDR1 pins, respectively. This allows up
to four ISL59911 devices to be independently controlled by the
same serial bus.
To control more than four devices (or more than two, if ADDR1 is
tied low as discussed in “Power Supply Sequencing” on page 10)
from a single I2C host, use a “chip select” signal for each device.
For example, in the firmware, the host can fix the I2C address to
1000101b for all devices, selecting the device to be
communicated to by taking its ADDR0 pin high while the ADDR0
pins of all other devices remain low. The selected device
recognizes its current address (1000101b) and respond
normally, while the remaining devices will have an address of
1000100b and therefore ignore the communication. This
requires one additional GPIO for each ISL59911, but it permits
as many ISL59111 devices to be controlled as desired, without
any additional external logic.
The bus is nominally inactive, with SDA and SCL high.
Communication begins when the host issues a START command
by taking SDA low while SCL is high (Figure 14). The ISL59911
continuously monitors the SDA and SCL lines for the start
condition and does not respond to any command until this
condition has been met. The host then transmits the 7-bit serial
address plus a R/W bit, indicating if the next transaction is a
Read (R/W = 1) or a Write (R/W = 0). If the address transmitted
matches that of any device on the bus, that device must respond
with an ACKNOWLEDGE (Figure 15).
Once the serial address has been transmitted and
acknowledged, one or more bytes of information can be written
to or read from the slave. Communication with the selected
device in the selected direction (read or write) is ended by a STOP
command, where SDA rises while SCL is high (Figure 14), or a
second START command, which is commonly used to reverse
data direction without relinquishing the bus.
The I2C spec requires that data on the serial bus must be valid
for the entire time SCL is high (Figure 16). To ensure incoming
data has settled, data written to the ISL59911 is latched on a
delayed version of the rising edge of SCL.
When the contents of the ISL59911 are being read, the SDA line
is updated after the falling edge of SCL, delayed and deglitched
in the same manner.
SCL
SDA
START
STOP
FIGURE 14. VALID START AND STOP CONDITIONS
SCL FROM
HOST
DATA OUTPUT
FROM TRANSMITTER
DATA OUTPUT
FROM RECEIVER
8
1
9
START
ACKNOWLEDGE
FIGURE 15. ACKNOWLEDGE RESPONSE FROM RECEIVER
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL59911IRZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL59911 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
| ISL59911IRZ-T7 | 功能描述:视频 IC ISL9519C EVALRD 1 50LD BATRY CHRGR RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| ISL59913 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Triple Differential Receiver/Equalizer |
| ISL59913IRZ | 功能描述:视频 IC ISL95210 5V/10AUCK FET INDSTRL TEMP RNG RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| ISL59913IRZ-EVALZ | 功能描述:EVAL BOARD FOR ISL59913IRZ RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 标准包装:1 系列:PCI Express® (PCIe) 主要目的:接口，收发器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要属性:- 次要属性:- 已供物品:板 |
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