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ADMC326 Datasheet(PDF) 4 Page - Analog Devices

Part No. ADMC326
Description  28-Lead ROM-Based DSP Motor Controller
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADMC326 Datasheet(HTML) 4 Page - Analog Devices

 
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ADMC326
–4–
REV. A
TIMING PARAMETERS
Parameter
Min
Max
Unit
Clock Signals
Signal tCK is defined as 0.5 tCKIN. The ADMC326 uses an input clock with a
frequency equal to half the instruction rate; a 10 MHz input clock (which is
equivalent to 100 ns) yields a 50 ns processor cycle (equivalent to 20 MHz). When
tCK values are within the range of 0.5 tCKIN period, they should be substituted for
all relevant timing parameters to obtain specification value.
Example: tCKH = 0.5 tCK – 10 ns = 0.5 (50 ns) – 10 ns = 15 ns.
Timing Requirements:
tCKIN
CLKIN Period
100
150
ns
tCKIL
CLKIN Width Low
20
ns
tCKIH
CLKIN Width High
20
ns
Switching Characteristics:
tCKL
CLKOUT Width Low
0.5 tCK – 10
ns
tCKH
CLKOUT Width High
0.5 tCK – 10
ns
tCKOH
CLKIN High to CLKOUT High
0
20
ns
Control Signals
Timing Requirement:
tRSP
RESET Width Low
5 tCK
1
ns
PWM Shutdown Signals
Timing Requirement:
tPWMTPW
PWMTRIP Width Low
tCK
ns
NOTES
1Applies after power-up sequence is complete.
Specifications subject to change without notice.
CLKIN
CLKOUT
tCKL
tCKIL
tCKH
tCKIH
tCKIN
tCKOH
Figure 1. Clock Signals


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