参数资料
型号: PCF51AC256BCFUE
厂商: Freescale Semiconductor
文件页数: 15/42页
文件大小: 0K
描述: MCU 8BIT 256K FLASH 64-QFP
标准包装: 84
系列: MCF51AC
核心处理器: Coldfire V1
芯体尺寸: 32-位
速度: 50MHz
连通性: I²C,SCI,SPI
外围设备: LVD,PWM,WDT
输入/输出数: 54
程序存储器容量: 256KB(256K x 8)
程序存储器类型: 闪存
RAM 容量: 32K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
数据转换器: A/D 20x12b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 64-QFP
包装: 托盘
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.7
Electrical Characteristics
Freescale Semiconductor
22
Figure 5. Typical IOH vs. VDD–VOH at VDD = 3 V (Low Drive, PTxDSn = 0)
22
D
DC injection current5 6 7 8 (single pin limit)
VIN >VDD
VIN <VSS
IIC
0
2
–0.2
mA
DC injection current (Total MCU limit, includes sum of all
stressed pins)
VIN >VDD
VIN <VSS
0
—25
–5
mA
1 Typical values are based on characterization data at 25
C unless otherwise stated.
2 Measured with V
In = VDD or VSS.
3 Measured with V
In = VSS.
4 Measured with V
In = VDD.
5 Power supply must maintain regulation within operating V
DD range during instantaneous and operating maximum current
conditions. If positive injection current (VIn > VDD) is greater than IDD, the injection current may flow out of VDD and could result
in external power supply going out of regulation. Ensure external VDD load will shunt current greater than maximum injection
current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or
if clock rate is very low (which would reduce overall power consumption).
6 All functional non-supply pins are internally clamped to V
SS and VDD.
7 Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate
resistance values for positive and negative clamp voltages, then use the larger of the two values.
8 The RESET pin does not have a clamp diode to V
DD. Do not drive this pin above VDD.
Table 10. DC Characteristics (continued)
Num
C
Parameter
Symbol
Min
Typical1
Max
Unit
–5.0E-3
–4.0E-3
–3.0E-3
–2.0E-3
–1.0E-3
000E+0
0
0.3
0.5
0.8
0.9
1.2
1.5
VDD–VOH (V)
VSupply–VOH
Average of IOH
I OH
(A)
25C
–6.0E-3
105C
-40C
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