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MPC8349E bảng dữ liệu(PDF) 49 Page - Freescale Semiconductor, Inc

tên linh kiện MPC8349E
Giải thích chi tiết về linh kiện  PowerQUICC??II Pro Integrated Host Processor Hardware Specifications
PDF  88 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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MPC8349E bảng dữ liệu(HTML) 49 Page - Freescale Semiconductor, Inc

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MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
Freescale Semiconductor
49
Timers
14 Timers
This section describes the DC and AC electrical specifications for the timers.
14.1
Timer DC Electrical Characteristics
Table 43 provides the DC electrical characteristics for the MPC8349E timer pins, including TIN, TOUT,
TGATE, and RTC_CLK.
14.2
Timer AC Timing Specifications
Table 44 provides the timer input and output AC timing specifications.
Table 43. Timer DC Electrical Characteristics
Characteristic
Symbol
Condition
Min
Max
Unit
Input high voltage
VIH
2.0
OVDD +0.3
V
Input low voltage
VIL
–0.3
0.8
V
Input current
IIN
±5
μA
Output high voltage
VOH
IOH = –8.0 mA
2.4
—
V
Output low voltage
VOL
IOL = 8.0 mA
—
0.5
V
Output low voltage
VOL
IOL = 3.2 mA
—
0.4
V
Table 44. Timers Input AC Timing Specifications1
Characteristic
Symbol2
Min
Unit
Timers inputs—minimum pulse width
tTIWID
20
ns
Notes:
1. Input specifications are measured from the 50 percent level of the signal to the 50 percent level of the rising edge of CLKIN.
Timings are measured at the pin.
2. Timer inputs and outputs are asynchronous to any visible clock. Timer outputs should be synchronized before use by external
synchronous logic. Timer inputs are required to be valid for at least tTIWID ns to ensure proper operation.



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