ADSP-21990BST Analog Devices Inc, ADSP-21990BST Datasheet - Page 27

• Manufacturer Part Number: ADSP-21990BST
• Description: IC DSP CONTROLLER 16BIT 176LQFP
• Manufacturer: Analog Devices Inc
• Series: ADSP-21xxr
• Type: Fixed Pointr

Specifications of ADSP-21990BST

• Rohs Status: RoHS non-compliant
• Interface: SPI, SSP
• Clock Rate: 160MHz
• Non-volatile Memory: External
• On-chip Ram: 20kB
• Voltage - I/o: 3.30V
• Voltage - Core: 2.50V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 176-LQFP

Timer PWM_OUT Cycle Timing
Table 8
input signal is asynchronous in “width capture mode” and has
an absolute maximum input frequency of 40 MHz.
Table 8. Timer PWM_OUT Cycle Timing
1
Parameter
Switching Characteristic
t
The minimum time for t
HTO
and
Figure 9
PWM_OUT
HCLK
Timer Pulse Width Output
HTO
describe timer expired operations. The
is one cycle, and the maximum time for t
1
Figure 9. Timer PWM_OUT Cycle Timing
Rev. A | Page 27 of 50 | August 2007
HTO
equals (2
32
–1) cycles.
t
HTO
Min
12.5
Max
(2
32
–1) cycles
ADSP-21990
Unit
ns