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MC908AP32CFAE 参数 Datasheet PDF下载

MC908AP32CFAE图片预览
型号: MC908AP32CFAE
PDF下载: 下载PDF文件 查看货源
内容描述: [MC908AP32CFAE]
分类和应用:
文件页数/大小: 325 页 / 4102 K
品牌: FREESCALE [ Freescale ]
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General Description  
PIN NAME  
Table 1-2. Pin Functions  
VOLTAGE  
LEVEL  
PIN DESCRIPTION  
IN/OUT  
8-bit general purpose I/O port; PTB0–PTB3 are open drain when  
configured as output. PTB4–PTB7 have schmitt trigger inputs.  
VDD  
In/Out  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
PTB0 as SDA of MMIIC.  
PTB1 as SCL of MMIIC.  
PTB2 as TxD of SCI; open drain output.  
PTB3 as RxD of SCI.  
In/Out  
In/Out  
Out  
PTB0/SDA  
PTB1/SCL  
PTB2/TxD  
PTB3/RxD  
In  
PTB4/T1CH0  
PTB5/T1CH1  
PTB6/T2CH0  
PTB7/T2CH1  
PTB4 as T1CH0 of TIM1.  
PTB5 as T1CH1 of TIM1.  
PTB6 as T2CH0 of TIM2.  
PTB7 as T2CH1 of TIM2.  
In/Out  
In/Out  
In/Out  
In/Out  
8-bit general purpose I/O port; PTC6 and PTC7 are open drain  
when configured as output.  
VDD  
In/Out  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
VDD  
PTC0 is shared with IRQ2 and has schmitt trigger input.  
PTC2 as MISO of SPI.  
In  
In  
PTC0/IRQ2  
PTC1  
PTC2/MISO  
PTC3/MOSI  
PTC4/SS  
PTC5/SPSCK  
PTC6/SCTxD  
PTC7/SCRxD  
PTC3 as MOSI of SPI.  
Out  
In  
PTC4 as SS of SPI.  
PTC5 as SPSCK of SPI.  
In/Out  
Out  
In  
PTC6 as SCTxD of IRSCI; open drain output.  
PTC7 as SCRxD of IRSCI.  
PTD0/KBI0  
:
PTD7/KBI7  
8-bit general purpose I/O port with schmitt trigger inputs.  
Pins as keyboard interrupts (with pullup), KBI0–KBI7.  
In/Out  
In  
1. See Chapter 22 Electrical Specifications for VREG tolerance.  
1.6 Power Supply Bypassing (VDD, VDDA, VSS, VSSA)  
V
and V are the power supply and ground pins, the MCU operates from a single power supply  
SS  
DD  
together with an on chip voltage regulator.  
Fast signal transitions on MCU pins place high. short-duration current demands on the power supply. To  
prevent noise problems, take special care to provide power supply bypassing at the MCU as Figure 1-5  
shows. Place the bypass capacitors as close to the MCU power pins as possible. Use  
high-frequency-response ceramic capacitor for C  
, C  
are optional bulk current bypass  
BYPASS  
BULK  
capacitors for use in applications that require the port pins to source high current level.  
MC68HC908AP Family Data Sheet, Rev. 4  
26  
Freescale Semiconductor