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UCS2113 датащи(PDF) 31 Page - Microchip Technology

номер детали UCS2113
подробное описание детали  USB Dual-Port Power Switch and Current Monitor
PDF  62 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

UCS2113 датащи(HTML) 31 Page - Microchip Technology

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 2016-2021 Microchip Technology Inc. and its subsidiaries
DS20005680B-page 31
UCS2113
7.13
SMBus Send Byte
The Send Byte protocol is used to set the internal
address register pointer to the correct address location.
No data is transferred during the Send Byte protocol as
shown in Table 7-6.
7.14
SMBus Receive Byte
The Receive Byte protocol is used to read data from a
register when the internal register address pointer is
known to be at the right location (e.g. set via Send
Byte). This is used for consecutive reads of the same
register as shown in Table 7-7.
7.14.1
STAND-ALONE OPERATING MODE
Stand-Alone mode allows the UCS2113 to operate
without
active
SMBus/I2C
communications.
Stand-Alone mode can be enabled by connecting a
pull-down resistor greater or equal to 47 k
 on the
COMM_ILIM pin as shown in Table 5-3.The SMCLK
pin should be tied to ground in this mode.
Note:
The SMBus Send Byte command is
expected to be followed by the SMBus
Receive Byte command. When two
SMbus Send Byte commands are sent in
a row, the first command receives an ACK
and will be processed by the UCS2113,
but the second command receives a
NACK and will be ignored.
TABLE 7-6:
SEND BYTE PROTOCOL
START
Client Address
WR
ACK
Register Address
ACK
STOP
1→0
YYYY_YYY
0
0
XXh
0
0 → 1
TABLE 7-7:
RECEIVE BYTE PROTOCOL
START
Client Address
RD
ACK
Register Data
NACK
STOP
1→0
YYYY_YYY
1
0
XXh
1
0 → 1



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