收藏本站
AT93C46
Table 5. Instruction Set for the AT93C46
Op
Address
Data
Instruction
READ
EWEN
ERASE
WRITE
ERAL
WRAL
EWDS
SB
1
1
1
1
1
1
1
Code
10
00
11
01
00
00
00
x8
A 6 – A 0
11XXXXX
A 6 – A 0
A 6 – A 0
10XXXXX
01XXXXX
00XXXXX
x 16
A 5 – A 0
11XXXX
A 5 – A 0
A 5 – A 0
10XXXX
01XXXX
00XXXX
x8
D 7 – D 0
D 7 – D 0
x 16
D 15 – D 0
D 15 – D 0
Comments
Reads data stored in memory, at
specified address
Write enable must precede all
programming modes
Erases memory location A n – A 0
Writes memory location A n – A 0
Erases all memory locations. Valid
only at V CC = 4.5V to 5.5V
Writes all memory locations. Valid
only at V CC = 4.5V to 5.5V
Disables all programming instructions
Note:
The Xs in the address field represent DON’T CARE values and must be clocked.
Functional
Description
The AT93C46 is accessed via a simple and versatile three-wire serial communication
interface. Device operation is controlled by seven instructions issued by the host pro-
cessor. A valid instruction starts with a rising edge of CS and consists of a start bit (logic
“1”) followed by the appropriate op code and the desired memory address location.
READ (READ): The Read (READ) instruction contains the address code for the mem-
ory location to be read. After the instruction and address are decoded, data from the
selected memory location is available at the serial output pin DO. Output data changes
are synchronized with the rising edges of serial clock SK. It should be noted that a
dummy bit (logic “0”) precedes the 8- or 16-bit data output string.
ERASE/WRITE ENABLE (EWEN): To assure data integrity, the part automatically goes
into the Erase/Write Disable (EWDS) state when power is first applied. An Erase/Write
Enable (EWEN) instruction must be executed first before any programming instructions
can be carried out. Please note that once in the EWEN state, programming remains
enabled until an EWDS instruction is executed or V CC power is removed from the part.
ERASE (ERASE): The Erase (ERASE) instruction programs all bits in the specified
memory location to the logical “1” state. The self-timed erase cycle starts once the
Erase instruction and address are decoded. The DO pin outputs the Ready/Busy status
of the part if CS is brought high after being kept low for a minimum of 250 ns (t CS ). A
logic “1” at pin DO indicates that the selected memory location has been erased and the
part is ready for another instruction.
WRITE (WRITE): The Write (WRITE) instruction contains the 8 or 16 bits of data to be
written into the specified memory location. The self-timed programming cycle t WP starts
after the last bit of data is received at serial data input pin DI. The DO pin outputs the
Read/Busy status of the part if CS is brought high after being kept low for a minimum of
250 ns (t CS ). A logic “0” at DO indicates that programming is still in progress. A logic “1”
indicates that the memory location at the specified address has been written with the
data pattern contained in the instruction and the part is ready for further instructions. A
Ready/Busy status cannot be obtained if the CS is brought high after the end of the self-
timed programming cycle tWP.
5
5140B–SEEPR–2/07
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)

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

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
AT93C56A-10TU-2.7 IC EEPROM 2KBIT 2MHZ 8TSSOP
AT93C86AY6-10YH-1.8 IC EEPROM 16KBIT 2MHZ 8MAP
ATAVRBFLY KIT EVALUATION AVR BUTTERFLY
ATAVRXBNDL XMEGA XPLAIN AND DISPLAY MODULE
ATDH2222 ADAPTER FOR ATDH2200 20PLCC
ATDH2225 CABLE ISP FOR AT17
ATDH2227 ADAPTER FOR ATDH2200 44PLCC
ATEVK1101 KIT DEV/EVAL FOR AVR32 AT32UC3B
相关代理商/技术参数
AT93C56 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Three-wire Serial EEPROMs
AT93C56-10PA-2.7C 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microwire Serial EEPROM
AT93C56-10PA-5.0C 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microwire Serial EEPROM
AT93C56-10PC 功能描述:电可擦除可编程只读存储器 1/2/4k 3-Wire Bus RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
AT93C56-10PC-1.8 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microwire Serial EEPROM
AT93C56-10PC-2.5 功能描述:IC EEPROM 2KBIT 2MHZ 8DIP RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:378 系列:- 格式 - 存储器:闪存 存储器类型:FLASH 存储容量:8M（1M x 8，512K x 16） 速度:110ns 接口:并联 电源电压:2.7 V ~ 3.6 V 工作温度:-40°C ~ 85°C 封装/外壳:48-CBGA 供应商设备封装:48-CBGA（7x7） 包装:托盘
AT93C56-10PC-2.7 制造商:Atmel Corporation 功能描述:Serial EEPROM, 128 x 16, 8 Pin, Plastic, DIP
AT93C56-10PI 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:3-wire Serial EEPROMs