參數(shù)資料
型號: MCF52235
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: ColdFire Microcontroller
中文描述: ColdFire微控制器
文件頁數(shù): 27/50頁
文件大?。?/td> 656K
代理商: MCF52235
MCF52235 Family Configurations
MCF52235 ColdFire Microcontroller, Rev. 3
Freescale Semiconductor
27
1.17
EzPort Signal Descriptions
Table 17
contains a list of EzPort external signals
Table 17. EzPort Signal Descriptions
1.18
Power and Ground Pins
The pins described in
Table 18
provide system power and ground to the chip. Multiple pins are provided for adequate current
capability. All power supply pins must have adequate bypass capacitance for high-frequency noise suppression.
Some of the V
DD
and V
SS
pins on the device are only to be used for noise bypass.
Figure 5
shows a typical connection diagram.
Pay particular attention to those pins which show only capacitor connections. Do not connect power supply voltage directly to
these pins.
Signal Name
Abbreviation
Function
I/O
EzPort Clock
EzPort Chip Select
EZPCK
EZPCS
Shift clock for EzPort transfers
Chip select for signalling the start and end
of serial transfers
EZPD is sampled on the rising edge of
EZPCK
EZPQ transitions on the falling edge of
EZPCK
I
I
EzPort Serial Data In
EZPD
I
EzPort Serial Data Out
EZPQ
O
Table 18. Power and Ground Pins
Signal Name
Abbreviation
Function
I/O
PLL Analog Supply
VDDPLL,
VSSPLL
Dedicated power supply signals to isolate the sensitive PLL analog
circuitry from the normal levels of noise present on the digital power
supply.
I
Positive Supply
VDD
These pins supply positive power to the core logic.
I
Ground
VSS
This pin is the negative supply (ground) to the chip.
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MCF5232CAB80 Integrated Microprocessor Hardware Specification
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