- 您现在的位置：买卖IC网 > PDF目录16573 > BUF20820EVM (Texas Instruments)EVAL MOUDLE FOR BUF20820 PDF资料下载
参数资料
| 型号： | BUF20820EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 3/29页 |
| 文件大小： | 0K |
| 描述： | EVAL MOUDLE FOR BUF20820 |
| 标准包装： | 1 |
| 系列： | * |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
BUF20820
SBOS330E DECEMBER 2005 REVISED OCTOBER 2008
www.ti.com
11
Write: OTP Memory for the DAC Register
The BUF20820 is able to write to the OTP memory of a
single DAC, or multiple DACs in a single communication
transaction. DAC addresses begin with 00000 (which
corresponds to DAC_1) through 10011 (which corre-
sponds to VCOM OUT2).
When programming the OTP memory, the analog supply
voltage must be between 8.5V and 18V.
Write commands are performed by setting the read/write
bit LOW.
To write to a single OTP register:
1.
Send a START condition on the bus.
2.
Send the device address and read/write bit = LOW.
The BUF20820 will acknowledge this byte.
3.
Send a DAC address byte. Bits D7D5 must be set to
0. Bits D4D0 are the DAC address. Only DAC
addresses 00000 to 10100 are valid and will be
acknowledged. See Table 3 for DAC addresses.
4.
Send two bytes of data for the OTP register of the
specified DAC. Begin by sending the most significant
byte first (bits D15D8, of which only bits D9 and D8
are data bits, and bits D15D14 must be 01), followed
by the least significant byte (bits D7D0). For address
10100, only D0 has meaning. This bit is the write
disable bit. The register is updated after receiving the
second byte.
5.
Send a STOP condition on the bus.
The BUF20820 will acknowledge each data byte. If the
master terminates communication early by sending a
STOP or START condition on the bus, the specified OTP
register will not be updated. Writing an OTP register will
also update the DAC register and output voltage.
To write to multiple OTP registers:
1.
Send a START condition on the bus.
2.
Send the device address and read/write bit = LOW.
The BUF20820 will acknowledge this byte.
3.
Send either the DAC_1 address byte to start at the
OTP register of the first DAC, or send the address byte
for whichever DAC will be the first in the sequence to
be updated. The BUF20820 will begin with the OTP
register of this DAC and step through subsequent
registers in sequential order.
4.
Send the bytes of data; begin by sending the most
significant byte (bits D15D8, of which only bits D9
and D8 have meaning, and bits D15D14 must be 01),
followed by the least significant byte (bits D7D0). The
first two bytes are for the OTP register of the DAC
addressed in step 3 above. This OTP register is
automatically updated after receiving the second byte.
The next two bytes are for the OTP register of the
following DAC (bits D15D14 must again be 01). That
DAC OTP register is updated after receiving the fourth
byte. This process continues until the registers of all
following DAC OTP registers have been updated. The
last address, 10100, is the address of the write disable
bit and cannot be accessed using this method. It must
be written using the write to a single OTP register
procedure.
5.
Send a STOP condition on the bus.
The BUF20820 will acknowledge each byte. To terminate
communication, send a STOP or START condition on the
bus. Only DAC registers that have received both bytes of
data will be programmed.
OTP WRITE DISABLE
Writing a ‘1’ in bit D0 of register 10100 disables all future
writes. The state of this bit can be accessed the same as
any other data bit. It is important to set this bit to 1 after the
OTP registers have been programmed to prevent
accidental changes to the OTP registers. Until bit D0 of
register 10100 is set to 1, any OTP register bit can be
changed from 0 to 1; however, once a bit is set to a 1, it
cannot be set back to 0.
相关PDF资料 |
PDF描述 |
|---|---|
| M1BXA-2436R | IDC CABLE - MSR24A/MC24M/X |
| RBM06DCMT | CONN EDGECARD 12POS .156 WW |
| GBC10DRSN-S273 | CONN EDGECARD 20POS DIP .100 SLD |
| GEM25DTMT-S189 | CONN EDGECARD 50POS R/A .156 SLD |
| SRP7030-R47M | INDUCTOR SHIELDED PWR 0.47UH SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BUF22821 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Programmable Gamma-Voltage Generator and VCOM Calibrator with Integrated Two-Bank Memory |
| BUF22821AIDCPR | 功能描述:LCD Gamma缓冲器 Prgrmbl Gam-Vltg Gen & Vcom Calibrator RoHS:否 制造商:Maxim Integrated 输入补偿电压: 转换速度: 电源电压-最大:20 V 电源电压-最小:9 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-38 封装:Tube |
| BUF22821EVM | 功能描述:放大器 IC 开发工具 BUF22821EVM Eval Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| BUF22821EVM-USB | 功能描述:放大器 IC 开发工具 BUF22821 Eval board Mod RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| BUF298AF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TRANSISTOR | BJT POWER MODULE | INDEPENDENT | 450V V(BR)CEO | 50A I(C) |
发布紧急采购，3分钟左右您将得到回复。