- 您現(xiàn)在的位置：買賣IC網 > PDF目錄98007 > M44C510-P40 (ATMEL CORP) 4-BIT, MROM, MICROCONTROLLER, PDIP40 PDF資料下載
參數(shù)資料
| 型號： | M44C510-P40 |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數(shù)： | 4/57頁 |
| 文件大?。?/td> | 1105K |
| 代理商： | M44C510-P40 |
第1頁第2頁第3頁當前第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頁第55頁第56頁第57頁
M44C510
TELEFUNKEN Semiconductors
Rev. A2, 13-Jan-98
12 (57)
1.5
Clock Generation
The M44C510 has a dual clock system, a system clock
(SYSCL) for the core and a 32-kHz subclock (SUBCL)
for the time-keeping peripheral modules (see figure 10).
Each clock can be generated from independent on-chip
oscillators or they can both be derived from the same high
frequency SYSCL oscillator. This is mask selectable - al-
lowing a choice of either an 4-MHz crystal, 4-MHz
ceramic resonator or a RC oscillator. All the necessary os-
cillator circuitry, with the exception of the actual crystal
or resonator, are integrated on chip. Therefore, if no exact
timing is required, for example, it is possible to use the
fully integrated RC oscillator, thus operating without any
external components.
An additional mask option enables a high resolution trim-
mable RC oscillator whereby the SYSCL can be trimmed
with an external resistor between SCLIN and VDD. In this
configuration, the SYSCL frequency can be maintained
stable to within a tolerance of
±10% over the full
operating temperature range. A SYSCL frequency of
2 MHz, for example, can be obtained by connecting a
200 k
W resistor (see figures 44, 48 and 49).
Some applications require only long-term time keeping
or low resolution timing. In this case, an on-chip, low-
power 32-kHz crystal oscillator can be used to generate
the SUBCL. This allows the core to go into SLEEP mode
when not used, and therefore greatly reduces power con-
sumption.
If the full (2-MHz) timing resolution is required, then ei-
ther the crystal or resonator oscillator should be used for
SYSCL generation.
Should a suitable external 1...8-MHz or 32-kHz clock
source be available, then SCLIN (Crystal oscillator con-
figuration) or OSCIN respectively can be used as the
input.
Note:
A SYSCL frequency of 2 MHz leads an instruc-
tion cycle time of 1
ms.
Crystal
oscillator
Ceramic
resonator
oscillator
RC-
oscillator
Oscin
Oscout
R Trim
Osc. select
SYSCL
Toggle
SCLIN
SCLOUT
SUBCL
32kHz
crystal
oscillator
OSCIN
OSCOUT
mask option
Divide by 64
Out
*
Osc. select
=
to CPU
to watchdog
to prescaler
to timer/counter
to buzzer
to timer/counter
96 11520
*
Oscin
Oscout
Out
*
Oscin
Oscout
Out
*
Figure 10. Clock module
相關PDF資料 |
PDF描述 |
|---|---|
| M44C510D-XXX-DOW | 4-BIT, MROM, MICROCONTROLLER |
| M44C588 | 4-BIT, MROM, 4 MHz, MICROCONTROLLER |
| M44C892 | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO20 |
| M48T08Y-15PC1 | 0 TIMER(S), REAL TIME CLOCK, PDMA28 |
| M48T08Y-10PC1 | 0 TIMER(S), REAL TIME CLOCK, PDMA28 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M44C890 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low-Current Microcontroller for Wireless Communication |
| M44C890-H | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low-Current Microcontroller for Wireless Communication |
| M44S05K4F1 | 功能描述:汽車連接器 MX44 Terminals RoHS:否 制造商:Amphenol SINE Systems 產品:Contacts 系列:ATP 位置數(shù)量: 型式:Female 安裝風格: 端接類型: 觸點電鍍:Nickel |
| M44T332538880MHZ | 制造商:MEC 功能描述: |
| M44T3338880MHZ | 制造商:MEC 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。