MCF51JM64 FREESCALE [Freescale Semiconductor, Inc], MCF51JM64 Datasheet - Page 27

• Manufacturer Part Number: MCF51JM64
• Description: MCF51JM128 ColdFire Microcontroller
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1
2
3
4
5
Num C
2.9
Freescale Semiconductor
Data in Typical column was characterized at 3.0 V, 25°C or is typical recommended value.
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.
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.
This parameter is characterized and not tested on each device. Proper PC board-layout procedures must be followed to achieve
specifications.
4 MHz crystal
1
2
3
4
5
6
—
T
T
Table 15. Oscillator Electrical Specifications (Temperature Range = –40 to 105°C Ambient)
Oscillator crystal or resonator (EREFS = 1, ERCLKEN = 1)
Load capacitors
Feedback resistor
Series resistor
Crystal start-up time
Square wave input clock frequency (EREFS = 0, ERCLKEN = 1)
• Low range (RANGE = 0)
• High range (RANGE = 1) FEE or FBE mode
• High range (RANGE = 1) PEE or PBE mode
• High range (RANGE = 1, HGO = 1) BLPE mode
• High range (RANGE = 1, HGO = 0) BLPE mode
• Low range (32 kHz to 38.4 kHz)
• High range (1 MHz to 16 MHz)
• Low range, low gain (RANGE = 0, HGO = 0)
• Low range, high gain (RANGE = 0, HGO = 1)
• High range, low gain (RANGE = 1, HGO = 0)
• High range, high gain (RANGE = 1, HGO = 1)
• Low range, low gain (RANGE = 0, HGO = 0)
• Low range, high gain (RANGE = 0, HGO = 1)
• High range, low gain (RANGE = 1, HG0 = 0)
• High range, high gain (RANGE = 1, HG0 = 1)
• FEE or FBE mode
• PEE or PBE mode
• BLPE mode
External Oscillator (XOSC) Characteristics
4
2
3
MCF51JM128 ColdFire Microcontroller, Rev. 2
Rating
5
2
3
5
≥ 8 MHz
≥ 8 MHz
4 MHz
4 MHz
1 MHz
1 MHz
t
t
CSTH-HGO
CSTL-HGO
Symbol
t
t
CSTH-LP
CSTL-LP
f
f
hi-hgo
f
f
f
hi-pll
extal
R
hi-fll
hi-lp
C
C
R
f
lo
S
1
2
F
Preliminary Electrical Characteristics
0.03125
manufacturer’s recommendation.
Min
32
—
—
—
—
—
—
—
—
—
—
1
1
1
1
1
0
See crystal or resonator
Typ
100
200
400
10
15
—
—
—
—
—
—
—
—
1
0
0
0
0
0
5
1
Max
38.4
16
16
10
20
16
40
—
—
—
—
—
—
—
5
8
0
5
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Unit
kHz
MΩ
MΩ
ms
kΩ
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