参数资料
型号: MCF5235CVM100
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 100 MHz, RISC PROCESSOR, PBGA256
封装: MAPBGA-256
文件页数: 11/76页
文件大小: 2665K
代理商: MCF5235CVM100
MOTOROLA
MCF523x Integrated Microprocessor Hardware Specifications
19
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Signal Primary Functions
2.2
Signal Primary Functions
2.2.1
Reset Signals
Table 3 describes signals that are used to either reset the chip or as a reset indication.
2.2.2
PLL and Clock Signals
Table 4 describes signals that are used to support the on-chip clock generation circuitry.
PST[3:0]
4
O
Test
TEST
1
I
PLL_TEST
1
I
Power Supplies
VDDPLL
1
I
VSSPLL
1
I
OVDD
22
I
OVSS
22
I
VDD
4
I
VSS
4
I
Table 3. Reset Signals
Signal Name
Abbreviation
Function
I/O
Reset In
RESET
Primary reset input to the device. Asserting RESET immediately
resets the CPU and peripherals.
I
Reset Out
RSTOUT
Driven low for 128 CPU clocks when the soft reset bit of the system
configuration register (SCR[SOFTRST]) is set. It is driven low for 32K
CPU clocks when the software watchdog timer times out or when a
low input level is applied to RESET.
O
Table 4. PLL and Clock Signals
Signal Name
Abbreviation
Function
I/O
External Clock In
EXTAL
Always driven by an external clock input except when used as a
connection to the external crystal when the internal oscillator circuit is
used. The clock source is configured during reset by CLKMOD[1:0].
I
Crystal
XTAL
Used as a connection to the external crystal when the internal
oscillator circuit is used to drive the crystal.
O
Clock Out
CLKOUT
This output signal reflects the internal system clock.
O
Table 2. Signal Descriptions (continued)
Signal Name
GPIO
Alternate 1
Alternate 2
Qty.
Dir.
Pullup
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