參數(shù)資料
型號(hào)： MPC8308-KIT
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 78/83頁(yè)
文件大?。?/td> 0K
描述： KIT EVALUATION FOR MPC830X
標(biāo)準(zhǔn)包裝： 1
系列： PowerQUICC II™ PRO
類(lèi)型： MPU
適用于相關(guān)產(chǎn)品： MPC8308
所含物品： 板，線纜，CD，電源
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 3
8
Freescale Semiconductor
RESET Initialization
Table 9. RTC_PIT_CLOCK AC Timing Specifications
5
RESET Initialization
This section describes the DC and AC electrical specifications for the reset initialization timing and
electrical requirements of the device.
5.1
RESET DC Electrical Characteristics
This table provides the DC electrical characteristics for the RESET pins.
Table 8. SYS_CLK_IN AC Timing Specifications
Parameter/
Symbol
Min
Typ
Max
Unit
Notes
SYS_CLK_IN frequency
fSYS_CLK_IN
24
—
66.67
MHz
1, 6
SYS_CLK_IN period
tSYS_CLK_IN
15
—
41.67
ns
—
SYS_CLK_IN rise and fall time
tKH, tKL
0.6
1.2
ns
2
SYS_CLK_IN duty cycle
tKHK/tSYS_CLK_IN
40
—
60
%
3
SYS_CLK_IN jitter
—
±150
ps
4, 5
Notes:
1. Caution: The system and core must not exceed their respective maximum or minimum operating frequencies.
2. Rise and fall times for SYS_CLK_IN are measured at 0.4 and 2.7 V.
3. Timing is guaranteed by design and characterization.
4. This represents the total input jitter—short term and long term—and is guaranteed by design.
5. The SYS_CLK_IN driver’s closed loop jitter bandwidth should be <500 kHz at –20 dB. The bandwidth must be set low to
allow cascade-connected PLL-based devices to track SYS_CLK_IN drivers with the specified jitter.
6. Spread spectrum is allowed up to 1% down-spread @ 33 kHz (max rate).
Parameter/
Symbol
Min
Typ
Max
Unit
Notes
RTC_PIT_CLOCK frequency
fRTC_PIT_CLOCK
1
32768
—
Hz
—
RTC_PIT_CLOCK rise and fall time
tRTCH, tRTCL
1.5
—
3
s—
RTC_PIT_CLOCK duty cycle
tRTCHK/tRTC_PIT_CLO
CK
45
—
55
%
—
Table 10. RESET Pins DC Electrical Characteristics
Characteristic
Symbol
Condition
Min
Max
Unit
Input high voltage
VIH
—2.0
NVDD +0.3
V
Input low voltage
VIL
—–0.3
0.8
V
Input current
IIN
0 V
V
IN NVDD
±5
A
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
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