UM1542 datasheet(40/43 Pages) STMICROELECTRONICS

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PC interface parameters description

UM1542

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Doc ID 023172 Rev 1

Appendix G

PC interface parameters description

Output in the table below is defined as the information sent by the STM8S MCU to the

STM32, and input is the contrary.

Table 8.

PC interface parameters

Parameter

Software type

Unit

Factory

setting

Allowable

range

Setting step

Temperature hysteresis

Input/output

°C

0.5 to 20

0.1

Evaporator temperature

Output

°C

N/A

-40 to +40

Evaporator temperature order 1

Input/output

°C

-5

-40 to 10

0.5

Evaporator temperature order 2

Input/output

°C

-12

-40 to 10

0.5

Evaporator temperature order 3

Input/output

°C

-20

-40 to 10

0.5

Evaporator temperature order 4

Input/output

°C

-28

-40 to 10

0.5

Evaporator temperature order 5

Input/output

°C

-36

-40 to 10

0.5

Compressor phase shift

Input/output

0.5

0.1 to 5

0.1

Gate current pulse width

for compressor control

Input/output

0.1 to 4

0.1

Gate current pulse width

for bulb control

Input/output

0.1 to 5

0.1

Gate current pulse width

for defrost resistor control

Input/output

0.1 to 3

0.1

Gate current pulse width for fan

Input/output

0.1 to 3

0.1

Fan phase shift

Input/output

0.5

0.1 to 5

0.1

Defrost activation delay

Input/output

Hours and

minutes

1 to 99

10’

Defrost duration

Input/output

Minutes and

seconds

1 to 60

10’

ZVS delay

Input/output

µs

5 to 255

Line frequency

Output

N/A

50 / 60

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