參數(shù)資料
型號: MC68MH360VR25L
廠商: Freescale Semiconductor
文件頁數(shù): 79/158頁
文件大?。?/td> 0K
描述: IC MPU QUICC 25MHZ 357-PBGA
標(biāo)準(zhǔn)包裝: 44
系列: M683xx
處理器類型: M683xx 32-位
速度: 25MHz
電壓: 5V
安裝類型: 表面貼裝
封裝/外殼: 357-BBGA
供應(yīng)商設(shè)備封裝: 357-PBGA(25x25)
包裝: 托盤
Chapter 1.Overview
If a clock pulse is missing in a given frame N, the counter will fail to reach its end state
before the next sync pulse (N+1) arrives, causing that sync pulse to be ignored. When the
counter nally reaches its end state, it waits for the next sync pulse (N+2) before resetting.
Correct routing is thus resumed in frame (N+2). In the case of an extra clock pulse, the
counter reaches its end state too early and resumes synchronized routing upon detecting the
next sync pulse (N+1).
Synchronization pulse errors are similar to clock pulse errors. If the frame pulse comes too
late, this is similar to having missed a clock pulse in the last time slot. If the frame pulse is
too early, it is similar to having one additional clock pulse.
1.9 E1/T1 Frame Description
The primary rate ISDN connections offer a cost-effective, high-speed interface. The
physical connections in North America offer 24 connections over a T1 interface; in Europe
an E1 (or CEPT) connection gives 32 connections of 64 Kbps each with a time-division-
multiplexed architecture.
Time-division-multiplexing (TDM) allows several communication channels to share the
same physical media. The data stream of each channel is divided into a number of
subpackages. Each channel is then assigned a subdivision of the TDM line called a time
slot. This time slot is repeated over time in a regular pattern. A concatenation of the
channels’ subpackages comprises a frame. The frequency of frame repetition depends on
the particular communication interface. Two examples—the T1 line used in North America
and the E1 interface used in Europe illustrate TDM.
For both E1 and T1, the frames must be repeated at a frequency of 8 KHz, or every 125
s.
In many applications the required channel speed is 64 Kbps. For example, almost all voice
channels use 8-KHz sampling with 8-bit resolution. Each channel in a T1 or E1 interface
occupies 8 bits per time slot. The T1 interface multiplexes 24 channels, requiring 24 time
slots per frame. In addition to the channels’ bits, one more bit, for frame signaling and
synchronization, is added to create a frame totaling 193 bits. The resulting T1 physical
interface is thus 1.544 Mbps (8 KHz * 193 bits). The E1 frame consists of multiplexing
32 channels resulting in a speed of 2.048 Mbps (8 KHz * 256 bits). These two frames are
illustrated in Figure 1-8.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料
PDF描述
MC68MH360CVR25L IC MPU QUICC 25MHZ 357-PBGA
HMC40DTEI CONN EDGECARD 80POS .100 EYELET
FMC50DRAS-S734 CONN EDGECARD 100PS .100 R/A SLD
EMC40DTEF CONN EDGECARD 80POS .100 EYELET
AMM22DREI CONN EDGECARD 44POS .156 EYELET
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68MH360VR25LR2 功能描述:微處理器 - MPU QUICC 2SMC 1SPI RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68MH360VR25VL 功能描述:微處理器 - MPU QUICC 2SMC 1SPI RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68MH360VR33L 功能描述:微處理器 - MPU QUICC 2SMC 1SPI RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68MH360VR33LR2 功能描述:微處理器 - MPU QUICC 2SMC 1SPI RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68MH360ZP25L 功能描述:IC MPU 32BIT QUICC 357-PBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:M683xx 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA(25x25) 包裝:托盤