參數資料
型號： M38K29F8LHP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64
封裝： 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64
文件頁數： 118/151頁
文件大?。?/td> 1403K
代理商： M38K29F8LHP
38K2 Group
Rev.3.00
Oct 15, 2006
page 69 of 147
REJ03B0193-0300
EXTERNAL BUS INTERFACE (EXB)
The external bus interface (EXB) controls the data transfer be-
tween the external MCU and the 38K2 group’s CPU or its
qCPU channel
It is a data transfer course by the interrupt processing between the
external MCU and the 38K2 group’s CPU.
qMemory channel
It is a data transfer course by direct RAM access of the memory
channel controller between the external MCU and the 38K2
group’s memory (multichannel RAM)
CPU channel
[Interrupt type]
Memory channel
[Direct RAM access type]
38K2 group
USB bus
(USB host)
Exter
nal
MCU
CPU
Program ROM
Peripheral functions
External bus interface
(EXB)
USB
Multichannel RAM
Fig. 103 External bus interface
Address
CS, RD, WR,
DMA acknowledge
Access cycle time from externals:
3 clocks or more of
φ + Signal delay time + Data setup
time of external MCU in USB inactive
5 clocks or more of
φ + Signal delay time + Data setup
time of external MCU in USB active
Fig. 104 Data transfer timing of memory channel
memory (multichannel RAM). The external bus interface is shown
below.
qData transfer of memory channel
When the burst mode is selected with the burst bit of the memory
channel operation mode register, data transfer can be carried out
at the highest speed. After the external bus interface detects a rise
of external read signal/write signal and synchronizes it with the in-
ternal clock
φ, it completes the data transfer between the transmit/
receive buffer and the multichannel RAM in two clocks.
However, the waiting time of two clocks at a maximum is gener-
ated to access the multichannel RAM in USB being operating
because the USB has priority to access.
Therefore, it is necessary to set up the access interval which fills
the following timing with the external MCU bus side.
In
φ = 8 MHz, data transfer at about 2 Mbytes/second is possible
at a maximum. When there is access simultaneously from the
USB, it is about 1.3 Mbytes/second.
In
φ = 6 MHz, data transfer at about 1.5 Mbytes/second is possible
at a maximum. When there is access simultaneously from the
USB, it is about 1 Mbytes/second.
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相關代理商/技術參數
參數描述
M38K29F8LHP#U0 功能描述:IC 740/38K2 MCU FLASH 64-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 產品培訓模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標準包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設備:DMA，POR，PWM，WDT 輸入/輸出數:121 程序存儲器容量:384KB（384K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數據轉換器:A/D 34x10b，D/A 2x8b 振蕩器型:內部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87
M38K29F8LHP#UO 制造商:Renesas Electronics Corporation 功能描述:
M38K29T-ADF 功能描述:DEV TEMPORARY TARGET BOARD FOR M RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標準包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關產品:1-Wire? 設備 產品目錄頁面:1429 (CN2011-ZH PDF)
M38K29T-PAC 制造商:Renesas Electronics Corporation 功能描述:DEV SIMPLE TOOL SYSTEM PKG FOR 38000/38K - Bulk
M38UC-150 制造商:M/A-COM Technology Solutions 功能描述:MICROWAVE MIXER - Bulk
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