SERC816 データシートの表示（PDF） - STMicroelectronics

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SERC816

SERCOS INTERFACE CONTROLLER

STMicroelectronics 

SERCON816

Table 1. SERCON816 I/O Port Function Summary (continued)

Signal(s)

WDOGN

L_ERRN

CYC_CLK

CON_CLK

DIV_CLK

SCLK

SCLKO2

SCLKO4

MCLK

RSTN

TEST

OUTZ

NDTRO

VSS

VDD

Pin(s)

IO

Function

24

O Watchdog output (active low)

32

O Line error, active low: goes low when signal distortion is too high or when the

receive signal is missing. The operating mode is programmed by the

processor.

34

I SERCOS interface cycle clock: CYC_CLK synchronizes the communication

cycles. The polarity is programmable.

35

O Control clock: becomes active within a communication cycle. Time, polarity

and width are programmable.

36

O Divided control clock: becomes active several times within a communication

cycle or once in several communication cycles. Number of pulses, start time,

repetition rate and polarity are programmable, the pulse width is 1 µs.

2

I Serial clock for clock regeneration: the maximum frequency is 64 MHz.

6

O Clock output: outputs the SCLK clock divided by 2 or 1.

5

O Clock output: outputs the SCLK clock divided by 4 or 2.

4

I Master clock for telegram processing and timing control, frequency 12 to 64

MHz.

10

I Reset, active low. Must be zero for at least 50 ns after power on.

7

I Test, active high. Has to be tied to VSS.

11

I Puts outputs into high impedance state, active high: OUTZ is 1 puts all pins

into a high impedance state. The clocks are turned off and the circuit is reset.

For the in-circuit test and for turning on the power-down mode.

9

O NAND tree output. For the test at the semiconductor manufacturers and for

the connection test after board production. NDTRO is not set to a high

impedance state.

3,15,23,33

,42,50,60,

70,81,91

Ground pins:

1,8,19,27,

37,55,65,

76,86

Power supply +5 V ± 5%.

3 ELECTRICAL (DC AND AC) CHARACTERISTICS

3.1 Absolute Maximum Ratings

Symbol

Parameter

VDD

Supply voltage

VI

Input voltage

VO

Output voltage

TSTG Storage temperature

Value

-0.5 to 6.5

-0.5 to VDD + 0.5

-0.5 to VDD + 0.5

-55 to +150

Unit

V

V

V

°C

7/23

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