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| 型号： | 93AA56XT-I/SN |
| 元件分类： | PROM |
| 英文描述： | 128 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SOIC-8 |
| 文件页数： | 12/13页 |
| 文件大小： | 102K |
| 代理商： | 93AA56XT-I/SN |
93AA46/56/66
DS20067H-page 8
1998 Microchip Technology Inc.
3.0
PIN DESCRIPTION
3.1
Chip Select (CS)
A HIGH level selects the device. A LOW level deselects
the device and forces it into standby mode. However, a
programming cycle which is already initiated and/or in
progress will be completed, regardless of the CS input
signal. If CS is brought LOW during a program cycle,
the device will go into standby mode as soon as the
programming cycle is completed.
CS must be LOW for 250 ns minimum (TCSL) between
consecutive instructions. If CS is LOW, the internal
control logic is held in a RESET status.
3.2
Serial Clock (CLK)
The Serial Clock is used to synchronize the communi-
cation between a master device and the 93AAXX.
Opcode, address, and data bits are clocked in on the
positive edge of CLK. Data bits are also clocked out on
the positive edge of CLK.
CLK can be stopped anywhere in the transmission
sequence (at HIGH or LOW level) and can be contin-
ued anytime with respect to clock HIGH time (TCKH)
and clock LOW time (TCKL). This gives the controlling
master freedom in preparing opcode, address, and
data.
CLK is a “Don't Care” if CS is LOW (device deselected).
If CS is HIGH, but START condition has not been
detected, any number of clock cycles can be received
by the device without changing its status (i.e., waiting
for START condition).
CLK cycles are not required during the self-timed
WRITE (i.e., auto ERASE/WRITE) cycle.
After detection of a start condition the specied number
of clock cycles (respectively LOW to HIGH transitions
of CLK) must be provided. These clock cycles are
required to clock in all required opcode, address, and
data bits before an instruction is executed (see instruc-
tion set truth table). CLK and DI then become don't care
inputs waiting for a new start condition to be detected.
3.3
Data In (DI)
Data In is used to clock in a START bit, opcode,
address, and data synchronously with the CLK input.
Note:
CS must go LOW between consecutive
instructions.
3.4
Data Out (DO)
Data Out is used in the READ mode to output data syn-
chronously with the CLK input (TPD after the positive
edge of CLK).
This pin also provides READY/BUSY status informa-
tion during ERASE and WRITE cycles. READY/BUSY
status information is available on the DO pin if CS is
brought HIGH after being LOW for minimum chip select
LOW time (TCSL) and an ERASE or WRITE operation
has been initiated.
The status signal is not available on DO, if CS is held
LOW or HIGH during the entire WRITE or ERASE
cycle. In all other cases DO is in the HIGH-Z mode. If
status is checked after the WRITE/ERASE cycle, a pull-
up resistor on DO is required to read the READY signal.
3.5
Organization (ORG)
When ORG is connected to VCC, the (x16) memory
organization is selected. When ORG is tied to VSS, the
(x8) memory organization is selected. ORG can only
be oated for clock speeds of 1MHz or less for the (x16)
memory organization. For clock speeds greater than 1
MHz, ORG must be tied to VCC or VSS.
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| 93AA56X-I/SN | 128 X 16 MICROWIRE BUS SERIAL EEPROM, PDSO8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 93AA66/P | 功能描述:电可擦除可编程只读存储器 512x8 Or 256x16 1.8V 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 |
| 93AA66/SN | 功能描述:电可擦除可编程只读存储器 512x8 Or 256x16 1.8V 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 |
| 93AA66A-I/MS | 功能描述:电可擦除可编程只读存储器 512x8 - 1.8V 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 |
| 93AA66A-I/MSG | 功能描述:电可擦除可编程只读存储器 512x8 - 1.8V Lead Free Package 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 |
| 93AA66A-I/P | 功能描述:电可擦除可编程只读存储器 512x8 - 1.8V 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 |
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