Document Number: 38-08036 Rev. *E Page 24 of 33
AC Digital Block Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and –40°C <
T
A
< 85°C, or 3.15V to 3.5V and –40°C < T
A
< 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and
are for design guidance only.
AC External Clock Specifications
The following tables list guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and –40°C <
T
A
< 85°C, or 3.15V to 3.5V and –40°C < T
A
< 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and
are for design guidance only.
Table 21. AC Digital Block Specifications
Function Description Min Typ Max Unit Notes
Timer Capture Pulse Width 50
[11]
– – ns
Maximum Frequency, No Capture – – 49.92 MHz 4.75V < Vdd < 5.25V.
Maximum Frequency, With Capture – – 25.92 MHz
Counter Enable Pulse Width 50
[11]
– – ns
Maximum Frequency, No Enable Input – – 49.92 MHz 4.75V < Vdd < 5.25V.
Maximum Frequency, Enable Input – – 25.92 MHz
Dead Band Kill Pulse Width:
Asynchronous Restart Mode 20 – – ns
Synchronous Restart Mode 50
[11]
– – ns
Disable Mode 50
[12]
– – ns
Maximum Frequency – – 49.92 MHz 4.75V < Vdd < 5.25V.
CRCPRS
(PRS
Mode)
Maximum Input Clock Frequency – – 49.92 MHz 4.75V < Vdd < 5.25V.
CRCPRS
(CRC
Mode)
Maximum Input Clock Frequency – – 24.6 MHz
SPIM Maximum Input Clock Frequency – – 8.2 MHz Maximum data rate at 4.1 MHz due to 2
x over clocking.
SPIS Maximum Input Clock Frequency – – 4.1 MHz
Width of SS_ Negated Between Trans-
missions
50
[11]
– – ns
Transmitter Maximum Input Clock Frequency – – 24.6 MHz Maximum data rate at 3.08 MHz due to 8
x over clocking.
Receiver Maximum Input Clock Frequency – – 24.6 MHz Maximum data rate at 3.08 MHz due to 8
x over clocking.
Table 22. AC External Clock Specifications
Parameter Description Min Typ Max Unit Notes
F
OSCEXT
Frequency for USB Applications 23.94 24 24.06 MHz USB operation in the extended Industrial
temperature range (–40°C <
T
A
< 85°C)
requires that the system clock is sourced
from an external clock oscillator.
– Duty Cycle 47
50 53 %
– Powerup to IMO Switch 150
– – μs
Note
11. 50 ns minimum input pulse width is based on the input synchronizers running at 24 MHz (42 ns nominal period).
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