AMD Vega 10 - Smbus Read Thermal Sensor

c. The SMBus master issues a write bit to the slave.
d. The SMBus slave acknowledges the master.
e. The SMBus master issues an 8-bit CMD_RD_DATA command to the slave.
f. The SMBus slave acknowledges the master.
g. The SMBus master terminates the transaction with a STOP.
3. Issuing an SMBus read to the slave:
a. The SMBus master issues a START bit to the slave.
b. The SMBus master issues an 7-bit slave address to the slave.
c. The SMBus master issues a read bit to the slave.
d. The SMBus slave acknowledges the master.
e. The SMBus slave sends a byte count (always 4).
f. The SMBus master acknowledges the slave.
g. The SMBus slave sends SMB_RD_DATA[31:24] to the master.
h. The SMBus master acknowledges the slave.
i. The SMBus slave sends SMB_RD_DATA[23:16] to the master.
j. The SMBus master acknowledges the slave.
k. The SMBus slave sends SMB_RD_DATA[15:8] to the master.
l. The SMBus master acknowledges the slave.
m. The SMBus slave sends SMB_RD_DATA[7:0] to the master.
n. The SMBus master acknowledges the slave.
o. The SMBus master terminates the transaction with a STOP.
4.1.3 SMBus Read Thermal Sensor
Programming sequence is shown below:
1. SMB Issue a Load Address Command (cmd1) to the
CG_MULT_THERMAL_STATUS address. (Tell SMBus slave which register to
read.)
82 01 04 0f 01 66 5A
2. SMB Issue a Read Data Command (cmd3) (Tell SMBus slave to read out thermal
value.)
82 03 83 <value read back>
3. Repeat step 2.
46 Timing Specifications
"Vega 10" Databook
56006_1.00
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