adsp-21478 Analog Devices, Inc., adsp-21478 Datasheet - Page 27

• Manufacturer Part Number: adsp-21478
• Description: Sharc Processor
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
Timer PWM_OUT Cycle Timing
The following timing specification applies to timer0 and timer1
in PWM_OUT (pulse-width modulation) mode. Timer signals
are routed to the DPI_P14–1 pins through the DPI SRU. There-
fore, the timing specifications provided below are valid at the
DPI_P14–1 pins.
Table 20. Timer PWM_OUT Timing
Timer WDTH_CAP Timing
The following timing specification applies to timer0 and timer1,
and in WDTH_CAP (pulse width count and capture) mode.
Timer signals are routed to the DPI_P14–1 pins through the
SRU. Therefore, the timing specification provided below is valid
at the DPI_P14–1 pins.
Table 21. Timer Width Capture Timing
Parameter
Switching Characteristic
t
Parameter
Timing Requirement
t
PWMO
PWI
Timer Pulse Width
Timer Pulse Width Output
(TIMER1–0)
DPI_P14–1
(TIMER1–0)
DPI_P14–1
Figure 14. Timer Width Capture Timing
Rev. PrB | Page 27 of 70 | March 2010
Figure 13. Timer PWM_OUT Timing
Min
2 × t
Min
2 × t
PCLK
PCLK
t
PWMO
– 1.2
t
PWI
ADSP-21478/ADSP-21479
Max
2 × (2
Max
2 × (2
31
31
– 1) × t
– 1) × t
PCLK
PCLK
Unit
ns
Unit
ns