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47L16 bảng dữ liệu(PDF) 24 Page - Microchip Technology

tên linh kiện 47L16
Giải thích chi tiết về linh kiện  4K/16K I2C Serial EERAM
PDF  40 Pages
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

47L16 bảng dữ liệu(HTML) 24 Page - Microchip Technology

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47L04/47C04/47L16/47C16
DS20005371C-page 24
 2015-2016 Microchip Technology Inc.
2.6
ACKNOWLEDGE POLLING
Since the device will not acknowledge during Store and
Recall operations, nor during the internal STATUS
register write cycles, checking for the Acknowledge
signal can be used to determine when those events are
complete. Once such
an
event
has started,
Acknowledge polling can be initiated immediately. This
involves the master sending a Start condition, followed
by the write control byte (R/W = 0) for either the SRAM
array or the Control registers. If the device is still busy,
then no Acknowledge will be returned. In this case,
then the Start condition and control byte must be
resent. If the Store or Recall is complete, then the
device will return an Acknowledge, and the master can
then proceed with the next Read or Write command.
See Figure 2-15 for flow diagram.
FIGURE 2-15:
ACKNOWLEDGE
POLLING FLOW
Send Start
Initiate
Store, Recall, or
STATUS Register Write Event
Send Control Byte
with R/W = 0
Did Device
Acknowledge
(ACK = 0)?
Next
Operation
NO
YES
Note:
Either the SRAM or Control register
control byte can be used for Acknowl-
edge Polling



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