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TMP1827 Datasheet(PDF) 41 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) 41 Page - Texas Instruments

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RST
ATR
SKIPADDR
WRITE SP-2
CCh
0Fh
2 BYTE EEPROM
ADDRESS
RST
ATR
SKIPADDR
READ SP-2
CCh
AAh
2 BYTE EEPROM
ADDRESS
8 BYTE DATA
WRITTEN
8 BYTE DATA TO
WRITE
CRC
CRC
RST
ATR
SKIPADDR
COPY SP-2
CCh
55h
WAIT FOR tPROGMAX
RST
ATR
SKIPADDR
READ EEPROM
CCh
AAh
2 BYTE EEPROM
ADDRESS
8 BYTE READ
DATA
CRC
Repeat for all
the blocks
that need to
be
programmed
NEXT 8 BYTE READ
DATA
CRC
A5h
Figure 8-28. Single Device EEPROM Programming and Verify Flow
8.5.5 Single Device EEPROM Lock Operation
When the device EEPROM is successfully programmed as shown in Figure 8-28, the host shall execute the
sequence, as shown in Figure 8-29, to write-protect the EEPROM block.
RST
ATR
SKIPADDR
WRITE SP-2
CCh
0Fh
2 BYTE EEPROM
PAGE LOCK
ADDRESS
RST
ATR
SKIPADDR
READ SP-2
CCh
AAh
2 BYTE EEPROM
PAGE LOCK
ADDRESS
1 BYTE LOCK CODE
READ BACK
1 BYTE LOCK CODE
WRITE
CRC
CRC
RST
ATR
SKIPADDR
COPY SP-2
CCh
55h
WAIT FOR t
PROGMAX
80h XXh
55h
80h XXh
55h
A5h
Figure 8-29. Single Device EEPROM Lock Operation Flow
8.5.6 Multiple Device IO Read
Figure 8-30 shows the program flow that the host MCU must execute for reading the IO from a device. The host
selects the device it wants to communicate with and issues the GPIO READ function. The host must wait for
the time it takes for the device to sample the IO, by keeping the bus idle, before the device returns the IO read
register value along with the CRC for the byte. The device at this point shall again sample the IOs. If the host
issues a bus reset during the sampling time, the device shall terminate the update process and it will hold the
last sampled value. If the host continues, then the new sampled values shall be sent back by the device.
www.ti.com
TMP1827
SBOSA15 – SEPTEMBER 2022
Copyright © 2022 Texas Instruments Incorporated
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