- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382643 > TMS370 (Texas Instruments, Inc.) RADIO FREQUENCY I DENTIFICATION SYSTEMS PDF資料下載
參數(shù)資料
| 型號： | TMS370 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | RADIO FREQUENCY I DENTIFICATION SYSTEMS |
| 中文描述： | 射頻我擠密系統(tǒng) |
| 文件頁數(shù)： | 16/54頁 |
| 文件大?。?/td> | 785K |
| 代理商： | TMS370 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當(dāng)前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁
TMS370Cx9x
8-BIT MICROCONTROLLER
SPNS036B – JANUARY 1996 – REVISED FEBRUARY 1997
16
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
clock modules
The ‘370Cx9x family provides two clock options which are referred to as divide-by-1 (PLL) and divide-by-4
(standard oscillator). Both the divide-by-1 and divide-by-4 options are configurable during the manufacturing
process of a TMS370 microcontroller. The ‘370C090A ROM-masked devices offer both options to meet system
engineering requirements. Only one of the two clock options is allowed on the ROM device while the EPROM
device ’792 has only the divide-by-4 clock.
The divide-by-1 clock module option provides the capability for reduced electromagnetic interference (EMI) with
no added cost.
The divide-by-1 provides a 1-to-1 match of the external resonator frequency (CLKIN) to the internal system clock
(SYSCLK) frequency. The divide-by-4 produces a SYSCLK which is one-fourth the frequency of the external
resonator. Inside the divide-by-1 module, the frequency of the external resonator is multiplied by four. The clock
module then divides the resulting signal by four to provide the four-phased internal system clock signals. The
resulting SYSCLK is equal to the resonator frequency. The frequencies are formulated as follows:
Divide-by-4 option : SYSCLK
external resonator frequency
4
external resonator frequency
CLKIN
4
Divide-by-1 option : SYSCLK
4
4
CLKIN
The main advantage of choosing a divide-by-1 oscillator is that EMI is reduced. The harmonics of low-speed
resonators extend through less of the emissions spectrum than the harmonics of faster resonators. The
divide-by-1 provides the capability of reducing the resonator speed by four times, and this results in a steeper
decay of emissions produced by the oscillator.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMS3705A | RADIO FREQUENCY I DENTIFICATION SYSTEMS |
| TMS370C002A | 8-BIT MICROCONTROLLER |
| TMS370C010A | 8-BIT MICROCONTROLLER |
| TMS370CX7XFN | 8-BIT MICROCONTROLLER |
| TMS370CX7XFZ | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS3705A1DRG4 | 功能描述:RFID應(yīng)答器 Transponder base station IC RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| TMS3705ADR | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TMS3705BDRG4 | 功能描述:RFID應(yīng)答器 LF Reader IC RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| TMS3705DDRQ1 | 功能描述:IC RFID BASE STATION LF 16SOIC 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:RFID 閱讀器 頻率:134.2kHz 標(biāo)準(zhǔn):- 接口:- 電壓 - 電源:5V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:16-SOIC 標(biāo)準(zhǔn)包裝:1 |
| TMS3705DR | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。