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TMP1827 Datasheet(PDF) 42 Page - Texas Instruments

Part # TMP1827
Description  TMP1827 Single-Wire, ±0.3°C Accurate Temperature Sensor With SHA-256-HMAC Authentication Engine, 2-kbit EEPROM
PDF  68 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMP1827 Datasheet(HTML) 42 Page - Texas Instruments

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RST
ATR
FLEXADDR
1-BYTE FLEX
ADDRESS DEVICE-
1
0Fh
GPIO READ
CRC
F5h
DEVICE SENDS
GPIO BYTE
RST
ATR
FLEXADDR
1-BYTE FLEX
ADDRESS DEVICE-
2
0Fh
GPIO READ
CRC
F5h
DEVICE SENDS
GPIO BYTE
CRC
DEVICE SENDS
GPIO BYTE
RST
ATR
FLEXADDR
1-BYTE FLEX
ADDRESS DEVICE-
3
0Fh
GPIO READ
CRC
F5h
DEVICE SENDS
GPIO BYTE
CRC
DEVICE SENDS
GPIO BYTE
Figure 8-30. Multiple Device GPIO Read Flow
8.5.7 Multiple Device IO Write and Read
Figure 8-31 shows the program flow that the host MCU must execute for configuring the and reading the IO
from a device. The host selects the device it wants to communicate with and issues the GPIO WRITE function.
The host shall then send the IO configuration register followed by an inverted value, that allows the device to
check for any bus transmission error. If the host receives a return code any other than AAh, it must terminate the
transaction by sending a bus reset. When the host gets the return code of AAh from the device, it shall wait for
the device to sample the bus and then read back the IO read register along with a CRC. If the host plans to read
the device continuously, then it must send a bus reset and initiate a GPIO READ function.
RST
ATR
FLEXADDR
1-BYTE FLEX
ADDRESS
0Fh
GPIO WRITE
GPIO CONFIG
BYTE
A5h
GPIO CONFIG
BYTE
CRC
DEVICE RETURN
CODE
DEVICE SENDS
GPIO BYTE
AAh
RST
ATR
FLEXADDR
1-BYTE FLEX
ADDRESS
0Fh
GPIO WRITE
GPIO CONFIG
BYTE
A5h
GPIO CONFIG
BYTE
CRC
DEVICE RETURN
CODE
DEVICE SENDS
GPIO BYTE
AAh
Figure 8-31. Multiple Device GPIO Write and Read Flow
TMP1827
SBOSA15 – SEPTEMBER 2022
www.ti.com
42
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Copyright © 2022 Texas Instruments Incorporated
Product Folder Links: TMP1827



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