- 您现在的位置：买卖IC网 > PDF目录183322 > MPC180LMB (FREESCALE SEMICONDUCTOR INC) MICROPROCESSOR, PQFP100 PDF资料下载
参数资料
| 型号： | MPC180LMB |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROPROCESSOR, PQFP100 |
| 封装： | LQFP-100 |
| 文件页数： | 13/28页 |
| 文件大小： | 356K |
| 代理商： | MPC180LMB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页
20
MPC180 Hardware Reference Manual
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
System Timing Analysis
1. Input hold margin to the MPC180. This can be optimized by having the MPC180 clock arrive
before the host processor clock.
2. Input setup margin to the host processor. This can be optimized by having the MPC180 clock
arrive before the host processor clock.
Since the two areas that need optimization require the clock offset to be adjusted in the same direction, the
PCB designer can intentionally offset the clock that drives the host processor in reference to the clock that
drives the MPC180 to maximize the timing margins. By adjusting the offset such that the clock to the
MPC180 arrives in time before the clock to the host processor, the input setup margin to the MPC180 can
be exchanged for input hold margin to the MPC180 and input hold margin to the host processor can be
exchanged for input setup margin to the host processor.
In choosing the appropriate clock offset, the PCB designers should make appropriate trade-offs in order to
balance the margin. In this analysis, 0.55 nS was chosen for the MPC850 and MPC860 in order to balance
the Data hold to the host processor with the CS hold to the MPC180. An offset of 1.0 nS was chosen for the
MPC8260 interface to balance the Data input hold to the MPC180 with the TA output hold to the MPC8260.
The following clock offsets will now be taken into consideration and the timing analysis will be repeated:
tclock_offset = 055 nS for the MPC850 and MPC860 (The clock that drives the MPC180 should
arrive 0.55 nS in absolute time before the clock that drives the MPC850 and MPC860)
tclock_offset = 1.0 nS for the MPC8260 (The clock that drives the MPC180 should arrive 1.0 nS in
absolute time before the clock that drives the MPC8260)
The input setup time margin is calculated for when the host processor is the source of the signal and the
MPC180 is the receiver. The results are shown in Table 13.
The input hold time margin will now be calculated for when the host processor is the source of the signal
and the MPC180 is the receiver. The results are shown in Table 14.
Table 13. MPC180 Input Setup Margin with Clock Offset
Signal
MPC180 Input
Setup Time
MCP850
Access Time
MPC860
Access Time
MPC8260
Access Time
Input Setup
Margin with
MPC850
Input Setup
Margin with
MPC860
Input Setup
Margin with
MPC8260
A[18:29]
1.0 nS
12.0 nS
11.75 nS
8.0 nS
5.55 nS
5.8 nS
4.1 nS
ENDIAN
1.0 nS
12.0 nS
11.75 nS
8.0 nS
5.55 nS
5.8 nS
4.1 nS
D[0:31]
1.0 nS
12.0 nS
11.75 nS
8.0 nS
5.55 nS
5.8 nS
4.1 nS
CS
1.1 nS
13.0 nS
11.75 nS
6.0 nS
4.45 nS
5.7 nS
6.0 nS
R/W
1.0 nS
12.0 nS
11.75 nS
6.0 nS
5.55 nS
5.8 nS
6.1 nS
BURST
1.0 nS
—
6.0 nS
—
6.1 nS
TS
1.0 nS
12.25 nS
11.0 nS
—
5.3 nS
6.55 nS
—
PSDVAL
1.0 nS
—
10.0 nS
—
2.1 nS
相关PDF资料 |
PDF描述 |
|---|---|
| MPC866P | Hardware Specifications |
| MPC866T | Hardware Specifications |
| MPC870 | Hardware Specifications |
| MPC870ZT66 | Hardware Specifications |
| MPC870ZT80 | Hardware Specifications |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MPC180TD | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MPC180 Security Processor |
| MPC180TS | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:MPC180 Security Processor |
| MPC1830ADTBEL | 制造商:Motorola Inc 功能描述: |
| MPC184VFB | 功能描述:微处理器 - MPU SECURITY COPROCESSOR 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 |
| MPC184VMB | 功能描述:微处理器 - MPU SECURITY CO-PRCSR 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 |
发布紧急采购，3分钟左右您将得到回复。