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参数资料
| 型号： | 24FC515T-I/SM |
| 厂商： | Microchip Technology |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 512KBIT 1MHZ 8SOIC |
| 产品培训模块： | I2C Serial EEPROM |
| 标准包装： | 2,100 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 512K (64K x 8) |
| 速度： | 1MHz |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIJ |
| 包装： | 带卷 (TR) |
| 其它名称： | 24FC515TI/SM |
24AA515/24LC515/24FC515
7.0
ACKNOWLEDGE POLLING
FIGURE 7-1:
ACKNOWLEDGE
Since the device will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete. (This feature can be used to maximize bus
throughput.) Once the Stop condition for a Write
command has been issued from the master, the device
initiates the internally timed write cycle. ACK polling
can be initiated immediately. This involves the master
sending a Start condition, followed by the control byte
for a Write command (R/W = 0 ). If the device is still
busy with the write cycle, then no ACK will be returned.
If no ACK is returned, then the Start bit and control byte
must be resent. If the cycle is complete, then the device
will return the ACK, and the master can then proceed
with the next Read or Write command. See Figure 7-1
for flow diagram.
POLLING FLOW
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Note:
Care must be taken when polling the
24LC515. The control byte that was used
to initiate the write needs to match the
control byte used for polling.
Send Control Byte
with R/W = 0
Did Device
Acknowledge
(ACK = 0 )?
Yes
Next
Operation
No
DS21673G-page 10
? 2008 Microchip Technology Inc.
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