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参数资料
| 型号： | MCF5407FT220 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 220 MHz, RISC PROCESSOR, PQFP208 |
| 封装： | 28 X 28 MM, 0.50 MM PITCH, PLASTIC, FQFP-208 |
| 文件页数： | 4/35页 |
| 文件大小： | 441K |
| 代理商： | MCF5407FT220 |
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12
MCF5407 Integrated ColdFire Microprocessor Product Brief
MOTOROLA
Programming Model, Addressing Modes, and Instruction Set
1.3.10 PLL Module
The MCF5407 PLL module is shown in Figure 3.
Figure 3. PLL Module
The PLL module’s three modes of operation (reset, normal, and reduced power) are described as follows.
Reset mode—When RSTI is asserted, the PLL enters reset mode. At reset, the PLL asserts RSTO
from the MCF5407. The core:bus frequency ratio along with other MCF5407 configuration
information are sampled during reset.
Normal mode—In normal mode, the input frequency programmed at reset is clock-multiplied to
provide the processor clock (PCLK).
Reduced-power mode—In reduced-power mode, the PCLK is disabled by executing a sequence
including programming a control bit in the system configuration register (SCR) and then executing
the STOP instruction. Register contents are retained in reduced-power mode, so the system can be
reenabled quickly when an unmasked interrupt or reset is detected.
1.4
Programming Model, Addressing Modes, and
Instruction Set
The ColdFire programming model is separated into two privilege modes—supervisor and user, which is
indicated by the S bit in the status register (SR). The processor identifies a logical address by accessing
either the supervisor or user address space, which differentiates between supervisor and user modes.
User mode—When the processor is in user mode (SR[S] = 0), only a subset of the registers can be
accessed and privileged instructions cannot be executed. Typically, most application processing
occurs in user mode. Entry into user mode is usually accomplished by executing a return from
exception instruction (RTE) (assuming the value of SR[S] saved on the stack is 0) or a MOVE, SR
instruction (assuming SR[S] is 0).
Supervisor mode—Supervisor mode protects system resources from uncontrolled access by users.
In supervisor mode, complete access to all registers and the entire ColdFire instruction set is
provided. Typically, system programmers use the supervisor programming model to implement
operating system functions and provide I/O control. The supervisor programming model provides
access to the same registers as the user model, plus additional registers for configuring on-chip
system resources, as described in Section 1.4.3, “Supervisor Registers.”
Exceptions (including interrupts) are handled in supervisor mode.
PLL
CLKIN
RSTI
PSTCLK
Debug Module
DIVIDE[2:0]
RSTO
PCLK (to core)
BCLKO
CLKIN (to on-chip peripherals)
÷2
(= PCLK/2)
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相关代理商/技术参数 |
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|---|---|
| MCF54410CMF250 | 制造商:Freescale Semiconductor 功能描述:MCF54410CMF250 - Bulk |
| MCF54415CMJ250 | 功能描述:微处理器 - MPU COLDFIREV4M CORE C90LP RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MCF54415CMJ250 | 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MCU COLDFIRE 250MHZ 256-MA |
| MCF54416CMJ250 | 功能描述:微处理器 - MPU COLDFIREV4M CORE C90LP RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324 |
| MCF54416CMJ250 | 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU COLDFIRE 250MHZ 256-MA |
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