参数资料
型号: DS2482X-100+T
厂商: Maxim Integrated Products
文件页数: 20/24页
文件大小: 0K
描述: IC MASTER I2C-1WIRE 1CH 9-WLP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
控制器类型: I²C 总线控制器
接口: I²C
电源电压: 2.9 V ~ 5.5 V
电流 - 电源: 750µA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 9-WFBGA,WLBGA
供应商设备封装: 9-WLP
包装: 带卷 (TR)
Single-Channel 1-Wire Master
Pin Description
PIN
SO
WLP
NAME
FUNCTION
1
B3
VCC
Power-Supply Input
2
C3
IO
Input/Output Driver for 1-Wire Line
3
C2
GND
Ground Reference
4
B1
SCL
I2C Serial Clock Input. Must be connected to VCC through a pullup resistor.
5
B2
SDA
I2C Serial Data Input/Output. Must be connected to VCC through a pullup resistor.
6
A1
PCTLZ
Active-Low Control Output for an External p-Channel MOSFET. Provides extra power to the 1-Wire
line, e.g., for use with 1-Wire devices that require a higher current temporarily to operate.
7
A2
AD1
8
A3
AD0
I2C Address Inputs. Must be connected to VCC or GND. These inputs determine the I2C slave
address of the device (see Figure 8).
CONFIGURATION
REGISTER
I2C
INTERFACE
CONTROLLER
INPUT/OUTPUT
CONTROLLER
LINE
XCVR
T-TIME OSC
DS2482-100
STATUS
REGISTER
READ DATA
REGISTER
SDA
IO
PCTLZ
AD0
AD1
SCL
Figure 1. Block Diagram
Detailed Description
The DS2482-100 is a self-timed 1-Wire master that sup-
ports advanced 1-Wire waveform features including
standard and overdrive speeds, active pullup, and
strong pullup for power delivery. The active pullup
affects rising edges on the 1-Wire side. The strong
pullup function uses the same pullup transistor as the
active pullup, but with a different control algorithm. In
addition, the strong pullup activates the PCTLZ pin,
controlling optional external circuitry to deliver addition-
al power beyond the capabilities of the on-chip pullup
transistor. Once supplied with command and data, the
input/output controller of the DS2482-100 performs
time-critical 1-Wire communication functions such as
reset/presence-detect cycle, read-byte, write-byte, sin-
gle-bit R/W, and triplet for ROM Search, without requir-
ing interaction with the host processor. The host obtains
feedback (completion of a 1-Wire function, presence
pulse, 1-Wire short, search direction taken) through the
Status Register and data through the Read Data
Register. The DS2482-100 communicates with a host
processor through its I2C bus interface in standard
mode or in fast mode. The logic state of two address pins
determines the I2C slave address of the DS2482-100,
allowing up to four devices operating on the same bus
segment without requiring a hub. See Figure 1 for a block
diagram.
DS2482-100
Maxim Integrated
5
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