serc816-tr STMicroelectronics, serc816-tr Datasheet - Page 7

• Manufacturer Part Number: serc816-tr
• Description: Sercos Interface Controller
• Manufacturer: STMicroelectronics

3
3.1 Absolute Maximum Ratings
Table 1. SERCON816 I/O Port Function Summary (continued)
Symbol
CON_CLK
CYC_CLK
T
Signal(s)
DIV_CLK
WDOGN
L_ERRN
V
SCLKO2
SCLKO4
NDTRO
V
ELECTRICAL (DC AND AC) CHARACTERISTICS
STG
V
MCLK
RSTN
OUTZ
SCLK
DD
TEST
VDD
O
VSS
I
Supply voltage
Input voltage
Output voltage
Storage temperature
3,15,23,33
,42,50,60,
1,8,19,27,
37,55,65,
70,81,91
Pin(s)
76,86
24
32
34
35
36
10
11
2
6
5
4
7
9
IO
O
O
O
O
O
O
O
I
I
I
I
I
I
Watchdog output (active low)
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.
SERCOS interface cycle clock: CYC_CLK synchronizes the communication
cycles. The polarity is programmable.
Control clock: becomes active within a communication cycle. Time, polarity
and width are programmable.
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 s.
Serial clock for clock regeneration: the maximum frequency is 64 MHz.
Clock output: outputs the SCLK clock divided by 2 or 1.
Clock output: outputs the SCLK clock divided by 4 or 2.
Master clock for telegram processing and timing control, frequency 12 to 64
MHz.
Reset, active low. Must be zero for at least 50 ns after power on.
Test, active high. Has to be tied to VSS.
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.
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.
Ground pins:
Power supply +5 V ± 5%.
Parameter
Function
-0.5 to V
-0.5 to V
-55 to +150
-0.5 to 6.5
Value
DD
DD
+ 0.5
+ 0.5
SERCON816
Unit
V
V
V
C
7/23