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參數(shù)資料
| 型號： | S80C188XL20 |
| 廠商： | INTEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, 20 MHz, MICROPROCESSOR, PQFP80 |
| 封裝： | EIAJ, QFP-80 |
| 文件頁數(shù)： | 46/48頁 |
| 文件大?。?/td> | 762K |
| 代理商： | S80C188XL20 |
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80C186XL80C188XL
DRAM Refresh Control Unit
The Refresh Control Unit (RCU) automatically gen-
erates DRAM refresh bus cycles The RCU operates
only in Enhanced Mode After a programmable peri-
od of time the RCU generates a memory read re-
quest to the BIU If the address generated during a
refresh bus cycle is within the range of a properly
programmed chip select that chip select will be acti-
vated when the BIU executes the refresh bus cycle
Power-Save Control
The 80C186XL when in Enhanced Mode can enter
a power saving state by internally dividing the proc-
essor clock frequency by a programmable factor
This divided frequency is also available at the
CLKOUT pin
All internal logic including the Refresh Control Unit
and the timers have their clocks slowed down by
the division factor To maintain a real time count or a
fixed DRAM refresh rate these peripherals must be
re-programmed when entering and leaving the pow-
er-save mode
Interface for 80C187 Math
Coprocessor (80C186XL Only)
In Enhanced Mode three of the mid-range memory
chip selects are redefined according to Table 1 for
use with the 80C187 The fourth chip select MCS2
functions as in compatible mode and may be pro-
grammed for activity with ready logic and wait states
accordingly As in Compatible Mode MCS2 will func-
tion for one-fourth a programmed block size
Table 1 MCS Assignments
Compatible
Enhanced Mode
Mode
MCS0
PEREQ Processor Extension Request
MCS1
ERROR NPX Error
MCS2
Mid-Range Chip Select
MCS3
NPS
Numeric Processor Select
ONCE Test Mode
To facilitate testing and inspection of devices when
fixed into a target system the 80C186XL has a test
mode available which allows all pins to be placed in
a high-impedance state ONCE stands for ‘‘ON Cir-
cuit Emulation’’ When placed in this mode the
80C186XL will put all pins in the high-impedance
state until RESET
The ONCE mode is selected by tying the UCS and
the LCS LOW during RESET These pins are sam-
pled on the low-to-high transition of the RES pin
The UCS and the LCS pins have weak internal pull-
up resistors similar to the RD and TEST BUSY pins
to guarantee ONCE Mode is not entered inadver-
tently during normal operation LCS and UCS must
be held low at least one clock after RES goes high
to guarantee entrance into ONCE Mode
7
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| S80C188XL25 | 制造商:Intel 功能描述:MPU Intel186 CISC 16-Bit CHMOS 25MHz 80-Pin PQFP |
| S80C194 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microcontroller |
| S80C196EA | 功能描述:IC MPU 16-BIT 5V 40MHZ 160-QFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND |
| S80C196KB | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:COMMERCIAL/EXPRESS CHMOS MICROCONTROLLER |
| S80C196KB WAF | 制造商:Intel 功能描述: |
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