Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

ATMEGA640 Datasheet(PDF) 368 Page - Microchip Technology

Part # ATMEGA640
Description  8-bit Microcontroller with 16/32/64KB In-System Programmable Flash
PDF  436 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATMEGA640 Datasheet(HTML) 368 Page - Microchip Technology

Back Button ATMEGA640 Datasheet HTML 364Page - Microchip Technology ATMEGA640 Datasheet HTML 365Page - Microchip Technology ATMEGA640 Datasheet HTML 366Page - Microchip Technology ATMEGA640 Datasheet HTML 367Page - Microchip Technology ATMEGA640 Datasheet HTML 368Page - Microchip Technology ATMEGA640 Datasheet HTML 369Page - Microchip Technology ATMEGA640 Datasheet HTML 370Page - Microchip Technology ATMEGA640 Datasheet HTML 371Page - Microchip Technology ATMEGA640 Datasheet HTML 372Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 368 / 436 page
background image
368
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
DS40002211A
2. This assumes 50% clock duty cycle. The half period is actually the low time of the external clock, XTAL1.
Table 31-12. External Data Memory Characteristics, 4.5 to 5.5 Volts, 1 Cycle Wait-state
Symbol
Parameter
8MHz Oscillator
Variable Oscillator
Unit
Min.
Max.
Min.
Max.
01/tCLCL
Oscillator Frequency
0.0
16
MHz
10
tRLDV
Read Low to Data Valid
200
2.0tCLCL-50
ns
12
tRLRH
RD Pulse Width
240
2.0tCLCL-10
15
tDVWH
Data Valid to WR High
240
2.0tCLCL
16
tWLWH
WR Pulse Width
240
2.0tCLCL-10
Table 31-13. External Data Memory Characteristics, 4.5 to 5.5 Volts, SRWn1 = 1, SRWn0 = 0
Symbol
Parameter
4MHz Oscillator
Variable Oscillator
Unit
Min.
Max.
Min.
Max.
01/tCLCL
Oscillator Frequency
0.0
16
MHz
10
tRLDV
Read Low to Data Valid
325
3.0tCLCL-50
ns
12
tRLRH
RD Pulse Width
365
3.0tCLCL-10
15
tDVWH
Data Valid to WR High
375
3.0tCLCL
16
tWLWH
WR Pulse Width
365
3.0tCLCL-10
Table 31-14. External Data Memory Characteristics, 4.5 to 5.5 Volts, SRWn1 = 1, SRWn0 = 1
Symbol
Parameter
4MHz Oscillator
Variable Oscillator
Unit
Min.
Max.
Min.
Max.
01/tCLCL
Oscillator Frequency
0.0
16
MHz
10
tRLDV
Read Low to Data Valid
325
3.0tCLCL-50
ns
12
tRLRH
RD Pulse Width
365
3.0tCLCL-10
14
tWHDX
Data Hold After WR High
240
2.0tCLCL-10
15
tDVWH
Data Valid to WR High
375
3.0tCLCL
16
tWLWH
WR Pulse Width
365
3.0tCLCL-10



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com