adsp-bf548 Analog Devices, Inc., adsp-bf548 Datasheet - Page 66

• Manufacturer Part Number: adsp-bf548
• Description: Blackfin Embedded Processor
• Manufacturer: Analog Devices, Inc.

ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
Up/Down Counter/Rotary Encoder Timing
Table 44
encoder timing.
Table 44. Up/Down Counter/Rotary Encoder Timing
1
Parameter
Timing Requirements
t
t
t
Either a valid setup and hold time or a valid pulse width is sufficient. There is no need to resynchronize counter inputs.
WCOUNT
CIS
CIH
and
Figure 35
CUD/CDG/CZM
Up/Down Counter/Rotary Encoder Input Pulse Width
Counter Input Setup Time Before CLKOUT Low
Counter Input Hold Time After CLKOUT Low
CLK OUT
describe up/down counter/rotary
Figure 35. Up/Down Counter/Rotary Encoder Timing
Rev. A | Page 66 of 88 | October 2008
t
CIS
t
1
WCOUNT
1
t
CIH
Min
t
4.0
4.0
SCLK
+ 1
Max
Unit
ns
ns
ns