STPM32TR datasheet(12/89 Pages) STMICROELECTRONICS

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Figure 9. UART enable and disable timing diagrams

SCS

MISO

1.5V

VOH

VOH -0.3V

90%

10%

3.0V

GND

tpZH

tpHZ

(*) Rising and falling time are measuring conditions and not an input operating specification

6ns(*)

Figure 10. Output load circuit for enable and disable times

(*) Probe and board capacitances included

50pF (*)

1Kohm

GND

MISO

Vcc

Probe

4.1

Pin programmability

Table 5. Programmable pin functions

Name

Multiplexed function

Functional description

I/O

CLKOUT/ZCR

System clock signal

Clock signals (DCLK, SCLK, MCLK, CLKIN)

Output

Zero-crossing

Line voltage/current zero-crossing

LED1

Programmable pulse 1

Primary channel energies (A, AF, R, S)(1)

Output

Secondary channel energies (A, AF, R, S)

Primary ± secondary channel energies (A, AF, R, S)

SD out current (DATI1)

Sigma-delta bitstream of primary current channel

LED2

Programmable pulse 2

Primary channel energies (A, AF, R, S)

Output

Secondary channel energies (A, AF, R, S)

Primary ± secondary channel energies (A, AF, R, S)

SD out current (DATI2)

Sigma-delta bitstream of secondary current channel

INT1

Interrupt

Programmable interrupt 1

Output

SD out voltage (DATV1)

Sigma-delta bitstream of primary voltage

INT2

Interrupt

Programmable interrupt 2

Output

SD out voltage (DATV2)

Sigma-delta bitstream of secondary voltage

SCS

SPI/UART select

Serial port selection at power-up

Input

Chip-select

SPI/UART

STPM32, STPM33, STPM34

Pin programmability

DS10272 - Rev 13

page 12/89

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