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参数资料
| 型号： | DS4550E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/18页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 9B 20TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 74 |
| 接口： | I²C，JTAG |
| 输入/输出数： | 9 |
| 中断输出： | 无 |
| 频率 - 时钟： | 400kHz |
| 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： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 管件 |
| 包括： | EEPROM |
Slave Address and Address Pins
The DS4550’s I2C slave address is determined by the
state of the A0, A1, and A2 address pins as shown in
Figure 2. Address pins connected to GND result in a ‘0’
in the corresponding bit position in the slave address.
Conversely, address pins connected to VCC result in a
‘1’ in the corresponding bit positions. I2C communica-
tion is described in detail in a later section.
IEEE 1149.1 JTAG Operation
The DS4550 contains an IEEE 1149.1 compliant JTAG
port in addition to the I2C serial bus. Either can be used
to access the internal memory. However, the device
contains no bus arbitration and hence both busses
cannot be used at the same time. All of the I/O pins on
the DS4550 are IEEE 1149.1 boundary-scan compliant.
I/O_0 to I/O_8 as well as the I2C port pins, contain the
typical JTAG boundary scan cells, which allow the pins
to be polled or forced high/low using standard JTAG
instructions. The DS4550 also contains some exten-
sions to normal JTAG functionality, which allows access
to the internal memory. In particular, the DS4550 has
three device-specific test data registers (Memory
Address, Memory Read, and Memory Write) and three
device-specific instructions (ADDRESS, READ, and
WRITE), which provide memory access.
DS4550
I2C and JTAG Nonvolatile 9-Bit I/O
Expander Plus Memory
_____________________________________________________________________
9
MEMORY ADDRESS REGISTER
[LENGTH = 8 BITS]
MEMORY READ REGISTER
[LENGTH = 8 BITS]
MEMORY WRITE REGISTER
[LENGTH = 8 BITS]
MUX 1
LSB
MSB
TEST REGISTERS
EEPROM
TDO
MUX 2
BOUNDARY SCAN REGISTER
[LENGTH = 33 BITS]
IDENTIFICATION REGISTER
[LENGTH = 32 BITS]
VCC
MSB
RJPU
TDI
TMS
TCK
LSB
BYPASS REGISTER
[LENGTH = 1 BIT]
INSTRUCTION REGISTER
[LENGTH = 4 BITS]
TEST ACCESS PORT
(TAP) CONTROLLER
Figure 3. DS4550 JTAG Block Diagram
*THE SLAVE ADDRESS IS DETERMINED BY
ADDRESS PINS A0, A1, AND A2.
1
MSB
SLAVE
ADDRESS*
READ/WRITE
BIT
LSB
01
0
A2
A1
A0
R/W
Figure 2. DS4550 I2C Slave Address Byte
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS4550E+ | 功能描述:接口-I/O扩展器 9-Bit I2C/JTAG NV GPIO RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| DS4550E+T&R | 制造商:Maxim Integrated Products 功能描述:I2C AND JTAG NONVOLATILE 9-BIT I/O 20TSSOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC I/O EXPANDER I2C 9B 20TSSOP |
| DS4550E+T&R | 功能描述:接口-I/O扩展器 9-Bit I2C/JTAG NV GPIO RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
| DS456 | 制造商:Miyama Electric 功能描述: |
| DS4560 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:12V Hot-Plug Switch |
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