參數(shù)資料
型號(hào): MC908QL4MDTER
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16
封裝: 0.65 MM PITCH, LEAD FREE, TSSOP-16
文件頁(yè)數(shù): 80/226頁(yè)
文件大?。?/td> 2850K
代理商: MC908QL4MDTER
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Slave LIN Interface Controller (SLIC) Module
MC68HC908QL4 Data Sheet, Rev. 8
170
Freescale Semiconductor
NOTE
Even though most internal oscillators are within ±25% before trimming, they
are stable at some frequency in that range, within at least ±5% over the
entire operating voltage and temperature range. The trimming operation
simply eliminates the offset due to factory manufacturing variations to
re-center the base oscillator frequency to the nominal value. Please refer to
the electrical specifications for the oscillator for more specific information,
as exact specifications might differ from module to module.
14.9.17 Digital Receive Filter
The receiver section of the SLIC module includes a digital low-pass filter to remove narrow noise pulses
from the incoming message. block diagram of the digital filter is shown in Figure 14-23.
Figure 14-23. SLIC Module Rx Digital Filter Block Diagram
14.9.17.1 Digital Filter Operation
The clock for the digital filter is provided by the SLIC Interface clock. At each positive edge of the clock
signal, the current state of the receiver input signal from the SLCRX pad is sampled. The SLCRX signal
state is used to determine whether the counter should increment or decrement at the next positive edge
of the clock signal.
The counter will increment if the input data sample is high but decrement if the input sample is low. The
counter will thus progress up towards the highest count value (determined by RXFP bit settings), on
average, the SLCRX signal remains high or progress down towards ‘0’ if, on average, the SLCRX signal
remains low. The final counter value which determines when the filter will change state is generated by
shifting the RXFP value right two positions and bitwise OR-ing the result with the value 0x0F. For
example, a prescale setting of divide by 3 (RXFP = 0x80) would give a count value of 0x2F.
When the counter eventually reaches this value, the digital filter decides that the condition of the SLCRX
signal is at a stable logic level 1 and the data latch is set, causing the filtered Rx data signal to become a
logic level 1. Furthermore, the counter is prevented from overflowing and can only be decremented from
this state.
Alternatively, when the counter eventually reaches the value ‘0’, the digital filter decides that the condition
of the SLCRX signal is at a stable logic level 0 and the data latch is reset, causing the filtered Rx data
DQ
UP/DOWN
OUT
4
EDGE &
COUNT
COMPARATOR
DQ
FILTERED
RX DATA OUT
SLIC CLOCK
RX DATA
FROM
SLCRX PIN
INPUT
SYNC
4-BIT UP/DOWN COUNTER
DIGITAL RX FILTER
PRESCALER (RXFP[1:0])
HOLD
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC908QL4MDW 功能描述:IC MCU 8BIT 4K FLASH 16-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC08 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN,SCI,SPI 外圍設(shè)備:POR,PWM,溫度傳感器,WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB(20K x 16) 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤(pán) 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC908QL4MDWE 功能描述:8位微控制器 -MCU NITRON LIN RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC908QL4V 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Microcontrollers
MC908QL4VDTE 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers
MC908QL4VDWE 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers