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參數(shù)資料
| 型號： | M34A08-VDW6T |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2 Kbit Serial SMBus EEPROM for ACR Card Configuration |
| 中文描述： | 2千位串行EEPROM中的SMBus對于ACR卡配置 |
| 文件頁數(shù)： | 7/15頁 |
| 文件大小： | 123K |
| 代理商： | M34A08-VDW6T |
7/15
M34A02
as ‘roll-over’ occurs. Data starts to become
overwritten (in a way not formally specified in this
data sheet).
The bus master sends from one up to 16 bytes of
data, each of which is acknowledged by the
memory if Write Control (WC) is Low. If Write
Control (WC) is High, the contents of the
addressed memory location are not modified, and
each data byte is followed by a NoAck. After each
byte is transferred, the internal byte address
counter (the 4 least significant bits only) is
incremented. The transfer is terminated by the bus
master generating a Stop condition.
Minimizing System Delays by Polling On ACK
During the internal Write cycle, the device
disconnects itself from the bus, and copies the
data from its internal latches to the memory cells.
The maximum Write time (t
w
) is shown in Table 6,
but the typical time is shorter. To make use of this,
an Ack polling sequence can be used by the bus
master.
The sequence, as shown in Figure 7, is:
– Initial condition: a Write cycle is in progress.
– Step 1: the bus master issues a Start condition
followed by a Device Select code (the first byte
of the new instruction).
– Step 2: if the device is busy with the internal
Write cycle, no Ack will be returned and the bus
master goes back to Step 1. If the device has
terminated the internal Write cycle, it responds
with an Ack, indicating that the memory is ready
to receive the second part of the next instruction
(the first byte of this instruction having been sent
during Step 1).
Read Operations
Read operations are performed independently of
the state of the Write Control (WC) signal.
Figure 8. Write Cycle Polling Flowchart using ACK
WRITE Cycle
in Progress
AI01847C
Next
Operation is
Addressing the
Memory
START Condition
DEVICE SELECT
with RW = 0
ACK
Returned
YES
NO
YES
NO
ReSTART
STOP
DATA for the
WRITE Operation
DEVICE SELECT
with RW = 1
Send Address
and Receive ACK
First byte of instruction
with RW = 0 already
decoded by the device
YES
NO
START
Condition
Continue the
WRITE Operation
Continue the
Random READ Operation
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PDF描述 |
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| M34C00 | SWITCH TACT 6MM SQ L=5.85MM160GF |
| M34C00-WDW6T | 3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
| M34C00-WMN6T | 3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
| M34C00MN | 3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
| M34C00DW | 3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34A08-VMN6T | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit Serial SMBus EEPROM for ACR Card Configuration |
| M34C/S | 制造商:Brady 功能描述:WEAR EAR PROTECTION |
| M34C00 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
| M34C00DW | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
| M34C00MN | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 x 128 bit Serial IC Bus EEPROM For ee-Tags |
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