參數(shù)資料
型號(hào)： IP80C86-2
廠商： INTERSIL CORP
元件分類： 微控制器/微處理器
英文描述： CMOS 16-Bit Microprocessor
中文描述： 16-BIT, 8 MHz, MICROPROCESSOR, PDIP40
封裝： PLASTIC, DIP-40
文件頁(yè)數(shù)： 7/35頁(yè)
文件大?。?/td> 339K
代理商： IP80C86-2
3-147
RQ/GT0
RQ/GT1
31, 30
I/O
REQUEST/GRANT: pins are used by other local bus masters to force the processor to release
the local bus at the end of the processor’s current bus cycle. Each pin is bidirectional with
RQ/GTO having higher priority than RQ/GT1. RQ/GT has an internal pull-up bus hold device so
it may be left unconnected. The request/grant sequence is as follows (see RQ/GT Sequence
Timing)
1. A pulse of 1 CLK wide from another local bus master indicates a local bus request (“hold”)
to the 80C86 (pulse 1).
2. During a T4 or TI clock cycle, a pulse 1 CLK wide from the 80C86 to the requesting master
(pulse 2) indicates that the 80C86 has allowed the local bus to float and that it will enter the
“grant sequence” state at the next CLK. The CPU’s bus interface unit is disconnected logi-
cally from the local bus during “grant sequence”.
3. A pulse 1 CLK wide from the requesting master indicates to the 80C86 (pulse 3) that the
“hold” request is about to end and that the 80C86 can reclaim the local bus at the next CLK.
The CPU then enters T4 (or TI if no bus cycles pending).
Each Master-Master exchange of the local bus is a sequence of 3 pulses. There must be one
idle CLK cycle after each bus exchange. Pulses are active low.
If the request is made while the CPU is performing a memory cycle, it will release the local
bus during T4 of the cycle when all the following conditions are met:
1. Request occurs on or before T2.
2. Current cycle is not the low byte of a word (on an odd address).
3. Current cycle is not the first acknowledge of an interrupt acknowledge sequence.
4. A locked instruction is not currently executing.
If the local bus is idle when the request is made the two possible events will follow:
1. Local bus will be released during the next cycle.
2. A memory cycle will start within three clocks. Now the four rules for a currently active memory
cycle apply with condition number 1 already satisfied.
LOCK
29
O
LOCK: output indicates that other system bus masters are not to gain control of the system bus
while LOCK is active LOW. The LOCK signal is activated by the “LOCK” prefix instruction and
remains active until the completion of the next instruction. This signal is active LOW, and is held
at a high impedance logic one state during “grant sequence”. In MAX mode, LOCK is automat-
ically generated during T2 of the first INTA cycle and removed during T2 of the second INTA
cycle.
QS1, QSO
24, 25
O
QUEUE STATUS: The queue status is valid during the CLK cycle after which the queue opera-
tion is performed.
QS1 and QS0 provide status to allow external tracking of the internal 80C86 instruction queue.
Note that QS1, QS0 never become high impedance.
Maximum Mode System
(Continued)
The following pin function descriptions are for the 80C86 system in maximum mode (i.e., MN/MX - GND). Only the pin functions which are
unique to maximum mode are described below.
SYMBOL
PIN
NUMBER
TYPE
DESCRIPTION
QSI
QSO
0
0
No Operation
0
1
First byte of op code from queue
1
0
Empty the queue
1
1
Subsequent byte from queue
80C86
相關(guān)PDF資料
PDF描述
IP80C88 CMOS 8/16-Bit Microprocessor
IP80C88-2 CMOS 8/16-Bit Microprocessor
IP82C50A-5 CMOS Asynchronous Communications Element
IP82C52 CMOS Serial Controller Interface
IP82C55AZ CMOS Programmable Peripheral Interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IP80C88 功能描述:微處理器 - MPU CPU 8/16BIT 5V 5MHZ IND 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(chǔ)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
IP80C88/+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor
IP80C88-2 功能描述:微處理器 - MPU CPU 8/16BIT 5V 8MHZ IND 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(chǔ)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
IP80C88-2/+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor
IP80C88-2S2064 制造商:Rochester Electronics LLC 功能描述:- Bulk
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*