參數(shù)資料
型號(hào): TWR-MCF51JE-KIT
廠(chǎng)商: Freescale Semiconductor
文件頁(yè)數(shù): 25/47頁(yè)
文件大?。?/td> 0K
描述: TOWER SYSTEM KIT MCF51JE
標(biāo)準(zhǔn)包裝: 1
系列: ColdFire®, Flexis™
類(lèi)型: MCU
適用于相關(guān)產(chǎn)品: Freescale 電源塔系統(tǒng),MCF51JE
所含物品: 4 個(gè)板,線(xiàn)纜,文檔,DVD
Preliminary Electrical Characteristics
MCF51JE256 Datasheet, Rev. 4
Freescale Semiconductor
31
o
Table 18. XOSC (Temperature Range = –40 to 105
C Ambient)
#
Characteristic
Symbol Minimum Typical1
1
Data in Typical column was characterized at 3.0 V, 25
C or is typical recommended value.
Maximum
Unit
1
Oscillator crystal or resonator
(EREFS = 1, ERCLKEN = 1)
Low range (RANGE = 0)
flo
32
38.4
kHz
High range (RANGE = 1),
FEE or FBE mode 2
2
When MCG is configured for FEE or FBE mode, input clock source must be divisible using RDIV to within the range of 31.25 kHz to 39.0625
kHz.
fhi-fll
1—
5
MHz
High range (RANGE = 1),
PEE or PBE mode 3
3
When MCG is configured for PEE or PBE mode, input clock source must be divisible using RDIV to within the range of 1 MHz to 2 MHz.
fhi-pll
1—
16
MHz
High range (RANGE = 1),
High gain (HGO = 1),
FBELP mode
fhi-hgo
1—
16
MHz
High range (RANGE = 1),
Low power (HGO = 0),
FBELP mode
fhi-lp
1—
8
MHz
2
Load capacitors
C1
C2
See Note 4
4
See crystal or resonator manufacturer’s recommendation.
3
Feedback resistor
Low range
(32 kHz to 38.4 kHz)
RF
10
M
High range
(1 MHz to 16 MHz)
——
1
4
Series resistor — Low range
Low Gain (HGO = 0)
RS
—0
k
High Gain (HGO = 1)
100
5
Series resistor — High range
Low Gain (HGO = 0)
RS
—0
k
High Gain (HGO = 1)
8 MHz
0
4 MHz
0
10
1 MHz
0
20
6
Crystal start-up time 5, 6
5
This parameter is characterized and not tested on each device.
6
Proper PC board layout procedures must be followed to achieve specifications.
Low range, low gain
(RANGE=0,HGO=0)
t
CSTL
200
ms
Low range, high gain
(RANGE=0,HGO=1)
400
High range, low gain
(RANGE=1,HGO=0)
tCSTH
—5
High range, high gain (RANGE=1,
HGO=1)
—15
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