參數(shù)資料
型號: MC68MH360VR25L
廠商: Freescale Semiconductor
文件頁數(shù): 130/158頁
文件大?。?/td> 0K
描述: IC MPU QUICC 25MHZ 357-PBGA
標準包裝: 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
供應商設備封裝: 357-PBGA(25x25)
包裝: 托盤
Chapter 5. Buffer Descriptors
Figure 5-2 shows how non-octet alignment is reported and how data is stored. The two
diagrams on the left show the reception of a single-buffer, 12-byte frame including the
CRC. In the top case, the reception is correctly octet-aligned and the frame length indicates
12 bytes.
11
NO
Rx non-octet-aligned frame (HDLC mode only)—A frame that contained a number of bits not
exactly divisible by eight was received. NO = 1 for any type of nonalignment regardless of frame
length. The shortest frame that can be detected is of type Flag-Bit-Flag. This causes the buffer to
be closed with the NO error indicated.
Figure 5-2 shows how the non-octet alignment is reported and where data can be found.
12
AB
Rx abort sequence—A minimum of seven consecutive ones was received during frame
reception. Abort is not detected between frames. The sequence ...closing-ag, data, CRC, ag,
AB, ag, data, opening-ag... does not cause an abort error. If the abort is long enough to be an
idle, an idle line interrupt may be generated. An abort within the frame is not reported by a unique
interrupt but rather with an RXF interrupt; the user has to examine the buffer descriptor.
13
CR
Rx CRC error—This frame contains a CRC error. The received CRC bytes are always written to
the receive buffer.
14–15
16–31
DL
Data length—the number of octets written by the CPM into this buffer descriptor’s data buffer. It is
written by the CPM once when the buffer descriptor is closed.
When this buffer descriptor is the last buffer descriptor of a frame (L = 1), the data length equals
the total number of octets in the frame (including the two- or four-byte CRC).
Note: The amount of memory allocated for this buffer should be greater than or equal to the
contents of the maximum receive buffer length register (MRBLR + 4).
32–63
RxBP
Rx buffer pointer—The receive buffer pointer, which always points to the rst location of the
associated data buffer, may reside in either internal or external memory. The Rx buffer pointer
must be divisible by 4.
Table 5-1. Receive Buffer Descriptor (RxBD) Field Descriptions (Continued)
Field
Name
Description
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
相關代理商/技術參數(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 標準包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點:- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應商設備封裝:357-PBGA(25x25) 包裝:托盤