參數(shù)資料
型號: PCF51AC256BCFUE
廠商: Freescale Semiconductor
文件頁數(shù): 26/42頁
文件大?。?/td> 0K
描述: MCU 8BIT 256K FLASH 64-QFP
標準包裝: 84
系列: MCF51AC
核心處理器: Coldfire V1
芯體尺寸: 32-位
速度: 50MHz
連通性: I²C,SCI,SPI
外圍設備: LVD,PWM,WDT
輸入/輸出數(shù): 54
程序存儲器容量: 256KB(256K x 8)
程序存儲器類型: 閃存
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 20x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-QFP
包裝: 托盤
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Electrical Characteristics
Freescale Semiconductor
32
2.10
MCG Specifications
Table 16. MCG Frequency Specifications (Temperature Range = –40 to 105
C Ambient)
Num C
Rating
Symbol
Min
Typical1
Max
Unit
1C
Internal reference frequency — factory trimmed at
VDD = 5 V and temperature = 25 C
fint_ft
32.768
kHz
2
C Average internal reference frequency — untrimmed
fint_ut
31.25
39.0625
kHz
3
T Internal reference startup time
tirefst
—60
100
s
4
C
DCO output frequency
range — untrimmed 2
Low range (DRS=00)
fdco_ut
16
20
MHz
C
Mid range (DRS=01)
32
40
C
High range (DRS=10)
48
60
5
P DCO output frequency2
reference =32768Hz
and DMX32 = 1
Low range (DRS=00)
fdco_DMX32
16.82
MHz
P
Mid range (DRS=01)
33.69
P
High range (DRS=10)
50.48
6D
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (using FTRIM)
f
dco_res_t
0.1
0.2
%fdco
7D
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (not using FTRIM)
f
dco_res_t
0.2
0.4
%fdco
8D
Total deviation of trimmed DCO output frequency over
voltage and temperature
f
dco_t
0.5
–1.0
2%f
dco
9D
Total deviation of trimmed DCO output frequency over
fixed voltage and temperature range of 0–70
C
f
dco_t
0.5
1%f
dco
10
D FLL acquisition time3
tfll_acquire
——
1
ms
11
D PLL acquisition time4
tpll_acquire
——
1
ms
12
D
Long term jitter of DCO output clock (averaged over
2ms interval) 5
CJitter
—0.02
0.2
%fdco
13
D VCO operating frequency
fvco
7.0
55.0
MHz
16
D Jitter of PLL output clock measured over 625 ns6
fpll_jitter_625ns
—0.5666
—%fpll
17
D Lock entry frequency tolerance 7
Dlock
1.49
2.98
%
MCU
EXTAL
XTAL
Crystal or Resonator
RS
C2
RF
C1
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