- 您现在的位置：买卖IC网 > PDF目录381516 > AT93C46A-10TU-2.7 (ATMEL CORP) Three-wire Serial EEPROM PDF资料下载
参数资料
| 型号： | AT93C46A-10TU-2.7 |
| 厂商： | ATMEL CORP |
| 元件分类： | DRAM |
| 英文描述： | Three-wire Serial EEPROM |
| 中文描述： | 64 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8 |
| 封装： | 0.170 INCH, LEAD AND HALOGEN FREE, PLASTIC, MO-153AA, TSSOP-8 |
| 文件页数： | 5/15页 |
| 文件大小： | 431K |
| 代理商： | AT93C46A-10TU-2.7 |
5
AT93C46A
0539K–SEEPR–2/07
Functional
Description
The AT93C46A 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 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 16 bits of data to be writ-
ten 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
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 “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, t
WP
.
ERASE ALL (ERAL):
The Erase All (ERAL) instruction programs every bit in the mem-
ory array to the logic “1” state and is primarily used for testing purposes. 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
). The ERAL instruction is valid only at V
CC
= 5.0V
±
10%.
WRITE ALL (WRAL):
The Write All (WRAL) instruction programs all memory locations
with the data patterns specified in the instruction. The DO pin outputs the ready/busy
Table 5.
Instruction Set for the AT93C46A
Instruction
SB
Op Code
Address
Comments
x 16
READ
1
10
A
5
A
0
Reads data stored in memory, at specified address
EWEN
1
00
11XXXX
Write enable must precede all programming modes
ERASE
1
11
A
5
A
0
A
5
A
0
Erase memory location A
n
A
0
Writes memory location A
n
A
0
WRITE
1
01
ERAL
1
00
10XXXX
Erases all memory locations. Valid only at V
CC
= 4.5V to 5.5V
WRAL
1
00
01XXXX
Writes all memory locations. Valid only at V
CC
= 4.5V to 5.5V
EWDS
1
00
00XXXX
Disables all programming instructions
相关PDF资料 |
PDF描述 |
|---|---|
| AT93C46B-10SI | 3-Wire Serial E2PROMs |
| AT93C46B-10SI-2.5 | 3-Wire Serial E2PROMs |
| AT93C46B-10SI-2.7 | 3-Wire Serial E2PROMs |
| AT93C46B | 3-Wire Serial E2PROMs |
| AT93C46B-10PC | 3-Wire Serial E2PROMs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT93C46B | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:3-Wire Serial E2PROMs |
| AT93C46B-10P127 | 制造商:Atmel Corporation 功能描述: |
| AT93C46B-10PC | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:3-Wire Serial E2PROMs |
| AT93C46B-10PC-2.5 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:3-Wire Serial E2PROMs |
| AT93C46B-10PC-2.7 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:3-Wire Serial E2PROMs |
发布紧急采购，3分钟左右您将得到回复。