欢迎访问ic37.com |
会员登录 免费注册
发布采购

93C46 参数 Datasheet PDF下载

93C46图片预览
型号: 93C46
PDF下载: 下载PDF文件 查看货源
内容描述: 1K 5.0V Microwire串行EEPROM [1K 5.0V Microwire Serial EEPROM]
分类和应用: 可编程只读存储器电动程控只读存储器电可擦编程只读存储器
文件页数/大小: 12 页 / 147 K
品牌: MICROCHIP [ MICROCHIP TECHNOLOGY ]
 浏览型号93C46的Datasheet PDF文件第2页浏览型号93C46的Datasheet PDF文件第3页浏览型号93C46的Datasheet PDF文件第4页浏览型号93C46的Datasheet PDF文件第5页浏览型号93C46的Datasheet PDF文件第7页浏览型号93C46的Datasheet PDF文件第8页浏览型号93C46的Datasheet PDF文件第9页浏览型号93C46的Datasheet PDF文件第10页  
93C46B
3.6
ERASE/WRITE Disable and Enable
(EWDS/EWEN)
3.7
READ
The READ instruction outputs the serial data of the
addressed memory location on the DO pin. A dummy
zero bit precedes the 16-bit output string. The output
data bits will toggle on the rising edge of the CLK and
are stable after the specified time delay (T
PD
). Sequen-
tial read is possible when CS is held high. The memory
data will automatically cycle to the next register and
output sequentially.
The device powers up in the ERASE/WRITE Disable
(EWDS) state. All programming modes must be pre-
ceded by an Erase/Write Enable (EWEN) instruction.
Once the EWEN instruction is executed, programming
remains enabled until an EWDS instruction is executed
or Vcc is removed from the device. To protect against
accidental data disturbance, the EWDS instruction can
be used to disable all ERASE/WRITE functions and
should follow all programming operations. Execution of
a READ instruction is independent of both the EWDS
and EWEN instructions.
FIGURE 3-4:
CS
EWDS TIMING
T
CSL
CLK
DI
1
0
0
0
0
X
•••
X
FIGURE 3-5:
EWEN TIMING
T
CSL
CS
CLK
DI
1
0
0
1
1
X
•••
X
FIGURE 3-6:
CS
READ TIMING
CLK
DI
1
1
0
An
•••
A0
DO
HIGH-Z
0
Dx
•••
D0
Dx
•••
D0
Dx
•••
D0
DS21172D-page 6
Preliminary
©
1997 Microchip Technology Inc.