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參數(shù)資料
| 型號： | M34C02-W-WDW1TG |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 2 Kbit Serial IC Bus EEPROM for DIMM serial presence detect |
| 中文描述： | 2千位串行IC總線的EEPROM內(nèi)存串行存在檢測 |
| 文件頁數(shù)： | 16/31頁 |
| 文件大?。?/td> | 162K |
| 代理商： | M34C02-W-WDW1TG |
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Device operation
M34C02-W, M34C02-L, M34C02-R
16/31
3.7.3
Minimizing system delays by polling on ACK
During the internal Write cycle, the device disconnects itself from the bus, and writes a copy
of the data from its internal latches to the memory cells. The maximum Write time (t
w
) is
shown in
Table 14
and
Table 16
, but the typical time is shorter. To make use of this, a polling
sequence can be used by the bus master.
The sequence, as shown in
Figure 9
, 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 device is ready to receive the second
part of the instruction (the first byte of this instruction having been sent during Step 1).
●
●
●
Figure 9.
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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| M34C02-W-WDW6TG | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit Serial IC Bus EEPROM for DIMM serial presence detect |
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| M34C02-W-WMB1TG | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit Serial IC Bus EEPROM for DIMM serial presence detect |
| M34C02-W-WMB6TG | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 Kbit Serial IC Bus EEPROM for DIMM serial presence detect |
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