adsp-2109lkp-55 Analog Devices, Inc., adsp-2109lkp-55 Datasheet - Page 21

• Manufacturer Part Number: adsp-2109lkp-55
• Description: Low Cost Dsp Microcomputers
• Manufacturer: Analog Devices, Inc.

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TIMING PARAMETERS (ADSP-2104/ADSP-2109)
CLOCK SIGNALS & RESET
Parameter
Timing Requirement:
t
t
t
t
Switching Characteristic:
t
t
t
NOTE
1
CK
CKL
CKH
RSP
CPL
CPH
CKOH
Applies after powerup sequence is complete. Internal phase lock loop requires no more than 2000 CLKIN cycles, assuming stable CLKIN (not including crystal
oscillator startup time).
CLKIN Period
CLKIN Width Low
CLKIN Width High
RESET Width Low
CLKOUT Width Low
CLKOUT Width High
CLKIN High to CLKOUT High
CLKOUT
CLKIN
Figure 19. Clock Signals
Min
50
20
20
15
15
0
250
t
CKL
t
CPL
20 MHz
t
CK
–21–
t
CKH
t
CKOH
t
Max
150
20
CPH
Min
20
20
5t
0.5t
0.5t
ADSP-2104/ADSP-2109
CK
CK
CK
1
Dependency
– 10
– 10
Frequency
Max
Unit
ns
ns
ns
ns
ns
ns
ns