AS5140 PB【PDF 20/38 页】BOARD PROGRAM AS5140

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录311

16页 17页 18页 19页 [20页]21页 22页 23页 24页

AS5140H

Data Sheet - D e t a i l e d D e s c r i p t i o n

7.6 Programming the AS5140H

Note: A detailed description of the austriamicrosystems low voltage polyfuse OTP programming method is given in Application Note AN514X-

10, which can be downloaded from the austriamicrosystems website. The OTP programming description in this datasheet is for general

information only.

After power-on, programming the AS5140H is enabled with the rising edge of CSn with Prog = high and CLK = low. The AS5140H programming

is a one-time-programming (OTP) method, based on polysilicon fuses. The advantage of this method is that a programming voltage of only 3.3V

is required for programming. The OTP consists of 52 bits, of which 21 bits are available for user programming. The remaining 31 bits contain

factory settings and a unique chip identifier (Chip-ID).

A single OTP cell can be programmed only once. Per default, the cell is “0”; a programmed cell will contain a “1”. While it is not possible to reset

a programmed bit from “1” to “0”, multiple OTP writes are possible, as long as only unprogrammed “0”-bits are programmed to “1”. Independent

of the OTP programming, it is possible to overwrite the OTP register temporarily with an OTP write command at any time. This setting will be

cleared and overwritten with the hard programmed OTP settings at each power-up sequence or by a LOAD operation.

The OTP memory can be accessed in several ways:

Load Operation : The Load operation reads the OTP fuses and loads the contents into the OTP register. Note that the Load operation is

automatically executed after each power-on-reset.

Write Operation : The Write operation allows a temporary modification of the OTP register. It does not program the OTP. This operation can

be invoked multiple times, and will remain set while the chip is supplied with power and while the OTP register is not modified with another

Write or Load operation.

Read Operation : The Read operation reads the contents of the OTP register, for example to verify a Write command or to read the OTP

memory after a Load command.

Program Operation : The Program operation writes the contents of the OTP register permanently into the OTP ROM.

Analog Readback Operation : The Analog Readback operation allows a quantifiable verification of the programming. For each pro-

grammed or unprogrammed bit, there is a representative analog value (in essence, a resistor value) that is read to verify whether a bit has

been successfully programmed or not.

7.6.1

OTP Memory Assignment

Table 19. OTP Bit Assignment

Bit

Symbol

mbit1

Md0

Md1

Div0

Div1

Index

CCW

RA0

RA4

Function

Factory Bit

Incremental Output Mode Selection

10 bit Zero Position

Direction

Redundancy Address

www.austriamicrosystems.com/AS5140H

FS 0

FS 1

FS 12

Revision 1.4

Factory Bit

19 - 37

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式