SAP51C-A-G1-R ZMDI, SAP51C-A-G1-R Datasheet - Page 43

• Manufacturer Part Number: SAP51C-A-G1-R
• Description: Interface - Specialized ASI
• Manufacturer: ZMDI

Specifications of SAP51C-A-G1-R

• Rohs: yes
• Product Type: Actuator Sensor Interface IC
• Operating Supply Voltage: 16 V to 34 V
• Supply Current: 6 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-20
• Minimum Operating Temperature: - 25 C

4.12. Oscillator Pins OSC1, OSC2
Table 28: Oscillator pin parameters
1
The oscillator supports direct connection of 5.33 MHz or 16.000 MHz crystals with a dedicated load capacity
of 12pF and parasitic pin capacities of up to 8pF. The IC automatically detects the oscillation frequency of the
connected crystal and controls the internal clock generator circuit accordingly. The oscillator unit also contains
a clock watch dog circuit that can generate an unconditioned IC reset if there was no clock oscillation for more
than about 20µs. This is to prevent the IC from unpredicted behavior if no clock signal is available anymore.
4.13. IC Reset
Any IC reset turns the Data Output and Parameter Output Registers to 0xF and forces the corresponding
output drivers to high impedance state. Except at Power On Reset, Data Strobe and Parameter Strobe signals
are simultaneously generated to visualize possibly changed output data to external circuitry.
The Data_Exchange_Disable flag becomes set during IC reset, prohibiting any data port activity right after IC
initialization and as long as the external circuitry was not pre-conditioned by decent parameter output data.
Consequently the AS-i master has to send a Write_Parameter call in advance of the first Data_Exchange
request to an initialized slave. Following IC initialization times apply:
Table 29: IC Initialization times
Symbol Parameter
t
t
t
1
2
3
4.13.1. Power On Reset
In order to force the IC into a defined state after power up and to avoid uncontrolled switching of the digital
logic if the 5V supply (U5R) breaks down below a certain minimum level, a Power On Reset is executed under
the following conditions:
Table 30: Power On Reset Threshold Voltages
Symbol Parameter
V
V
t
1
Data Sheet
October 20, 2011
Symbol
V
C
C
V
V
INIT
INIT2
INIT3
Low
for external clock applied to OSC1
guaranteed by design
‘power on’ starts latest at V
C
guaranteed by design
POR1F
POR1R
SAP5S / SAP51
Universal Actuator-Sensor Interface IC
OSC_IN
IL
IH
OSC
CRYSTAL
UOUT
= 470µF, t
Initialization time after Software Reset (generated by master
calls Reset_Slave or Broadcast_Reset) or external reset via
DSTBn
Initialization time after power on
Initialization time after power on with high capacitive load
V
V
Power-on reset pulse width
U5R
U5R
voltage to trigger INIT procedure, rising voltage
voltage to trigger internal reset procedure, falling voltage
Parameter
Input voltage range
External parasitic capacitor at oscillator pins OSC1, OSC2
Crystal load capacitance
Input ”low” voltage
Input ”high” voltage
© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 3.0
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without
the prior written consent of the copyright owner. The information furnished in this publication is PRELIMINARY and subject to
changes without notice.
INIT3
is guaranteed by design only
UIN
= 18V, external capacitor at pin UOUT less than or equal 10µF
Min
Min
1.2
3.5
4
-0.3
Min
3.5
0
0
0
1000
Max
Max
1.7
4.3
30
2
6
V
V
Max
1.5
12
U5R
8
U5R
Unit
Unit
ms
ms
ms
µs
V
V
Unit
pF
pF
V
V
V
43 of 63
Note
Note
Note
1
1
1
2
3
1
1