Electronic Components Datasheet Search
  New Zealand  ▼
ALLDATASHEET.CO.NZ

X  

Preview PDF HTML

STK501 Datasheet(PDF) 13 Page - ATMEL Corporation

Part # STK501
Description  STK500 Compatible
PDF  29 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

STK501 Datasheet(HTML) 13 Page - ATMEL Corporation

Back Button STK501 Datasheet HTML 9Page - ATMEL Corporation STK501 Datasheet HTML 10Page - ATMEL Corporation STK501 Datasheet HTML 11Page - ATMEL Corporation STK501 Datasheet HTML 12Page - ATMEL Corporation STK501 Datasheet HTML 13Page - ATMEL Corporation STK501 Datasheet HTML 14Page - ATMEL Corporation STK501 Datasheet HTML 15Page - ATMEL Corporation STK501 Datasheet HTML 16Page - ATMEL Corporation STK501 Datasheet HTML 17Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 13 / 29 page
background image
Using the STK501 Top Module
AVR
® STK501 User Guide
2-7
2.5.1
A16
The A16 pin on the PORTG/AUX connector is connected to A16 (address pin 16) on the
SRAM. ATmega103(L) and ATmega128(L) support up to 60 KB of external SRAM. The
STK501 SRAM footprint is for a 128 KB SRAM. Implementing software control of the
A16 line will increase the memory range from 64 KB to 128 KB. This line is pulled low by
default, addressing the lower 64 KB of the SRAM.
Figure 2-10. SRAM Block Schematic
2.5.2
SRAMEN
The SRAMEN pin on the PORTG/AUX connector is connected to the Chip-enable (CE)
pin of the SRAM. This signal controls if the SRAM should be enabled or not. To enable
the SRAM, a low level should be applied to this pin. This pin is pulled high by default,
through a 10 k
Ω resistor. Figure 2-10 shows a simplified block schematic on how the
SRAM interface is implemented. Figure 2-11 shows how to enable the SRAM by short-
ing SRAMEN and GND on the PORTG/AUX connector using one of the supplied
jumpers.
This signal can also be controlled by software or by some external control logic.
Table 2-1. Recommended SRAM Devices
Manufacturer
Part Number
Supply Voltage (V)
Package
ISSI
IS63LV1024-T
3.3
TSOP-II
ISSI
IS63LV1024-J
3.3
SOJ 300-mil
ISSI
IS63LV1024-K
3.3
SOJ 400-mil
IDT
IDT71124-Y
5.0
SOJ 400-mil
IDT
IDT71V124SA-TY
3.3
SOJ 300-mil
IDT
IDT71V124SA-Y
3.3
SOJ 400-mil
IDT
IDT71V124SA-PH
3.3
TSOP-II
VTG
PA6
PA7
PA5
PA4
PA3
PA2
PA1
PA0
PA6
PA7
PA5
PA4
PA3
PA2
PA1
PA0
PC6
PC7
PC5
PC4
PC3
PC2
PC1
PC0
OE
WE
CE
SRAM
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
D0
D1
D2
D3
D4
D5
D6
D7
10K x 12
LATCH
LE
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
D1
D2
D3
D4
D5
D6
D7
D0
AVR
PORTA
ALE (PG2)
WR (PG0)
RD (PG1)
PORTC
OE
A6
A7
A5
A4
A3
A2
A1
A0
VTG
A[7:0]
A6
A4
A2
A0
A7
A5
A3
A1
A6
A4
A2
A0
A7
A5
A3
A1
From
PORTG/AUX
connector
SRAMEN
A16
RAM HIGH
ADDRESS



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


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