参数资料
型号: MCF51QF32VHS
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: FLASH, 50 MHz, MICROCONTROLLER, QCC44
封装: 5 X 5 MM, QFN-44
文件页数: 16/72页
文件大小: 1031K
代理商: MCF51QF32VHS
Table 14. MCG specifications (continued)
Symbol
Description
Min.
Typ.
Max.
Unit
Notes
Dlock
Lock entry frequency tolerance
± 1.49
± 2.98
%
Dunl
Lock exit frequency tolerance
± 4.47
± 5.97
%
tpll_lock
Lock detector detection time
150 × 10-6
+ 1075(1/
fpll_ref)
s
1. The startup time is defined as the time between the IRC being enabled, either by the MCG or by the IRCLKEN bit being
set, and the first edge of the internal reference clock.
2. This parameter is measured with the internal reference (slow clock) being used as a reference to the FLL (FEI clock
mode).
3. These typical values listed are with the slow internal reference clock (FEI) using factory trim and DMX32=0.
4. The resulting system clock frequencies should not exceed their maximum specified values. The DCO frequency deviation
(
Δfdco_t) over voltage and temperature should be considered.
5. These typical values listed are with the slow internal reference clock (FEI) using factory trim and DMX32=1.
6. The resulting clock frequency must not exceed the maximum specified clock frequency of the device.
7. This specification was obtained at TBD frequency.
8. This specification applies to any time the FLL reference source or reference divider is changed, trim value is changed,
DMX32 bit is changed, DRS bits are changed, or changing from FLL disabled (BLPE, BLPI) to FLL enabled (FEI, FEE,
FBE, FBI). If a crystal/resonator is being used as the reference, this specification assumes it is already running.
9. Excludes any oscillator currents that are also consuming power while PLL is in operation.
10. This specification was obtained using a Freescale developed PCB. PLL jitter is dependent on the noise characteristics of
each PCB and results will vary.
11. This specification applies to any time the PLL VCO divider or reference divider is changed, or changing from PLL disabled
(BLPE, BLPI) to PLL enabled (PBE, PEE). If a crystal/resonator is being used as the reference, this specification assumes
it is already running.
6.3.2 Oscillator electrical specifications
This section provides the electrical characteristics of the module.
6.3.2.1 Oscillator DC electrical specifications
Table 15. Oscillator DC electrical specifications
Symbol
Description
Min.
Typ.
Max.
Unit
Notes
VDD
Supply voltage
1.71
3.6
V
IDDOSC
Supply current — low-power mode (HGO=0)
32 kHz
1 MHz
4 MHz
8 MHz (RANGE=01)
16 MHz
24 MHz
32 MHz
500
200
300
950
1.2
1.5
nA
μA
mA
Table continues on the next page...
Clock modules
MCF51JF128 Advance Information Data Sheet, Rev. 3, 08/2011.
Freescale Semiconductor, Inc.
Preliminary
23
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