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23LC1024 Datasheet

Download or read online Microchip Technology 23LC1024 1Mbit SPI Serial SRAM With SDI And SQI Interface pdf datasheet.



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1Mbit SPI Serial SRAM with SDI and SQI Interface
Device Selection Table
Part
V
Range
CC
Number
23A1024
1.7-2.2V
23LC1024
2.5-5.5V
Features:
• SPI-Compatible Bus Interface:
- 20 MHz Clock rate
- SPI/SDI/SQI mode
• Low-Power CMOS Technology:
- Read Current: 3 mA at 5.5V, 20 MHz
- Standby Current: 4 A at +85° C
• Unlimited Read and Write Cycles
• Zero Write Time
• 128K x 8-bit Organization:
- 32-byte page
• Byte, Page and Sequential mode for Reads and
Writes
• High Reliability
• Temperature Range Supported:
- Industrial (I):
-40C to +85C
• Pb-Free and RoHS Compliant, Halogen Free
• 8 Lead SOIC, TSSOP and PDIP Packages
Pin Function Table
Name
Function
CS
Chip Select Input
SO/SIO1
Serial Output/SDI/SQI Pin
SIO2
SQI Pin
Vss
Ground
SI/SIO0
Serial Input/SDI/SQI Pin
SCK
Serial Clock
HOLD/SIO3
Hold/SQI Pin
Vcc
Power Supply
 2011 Microchip Technology Inc.
23A1024/23LC1024
Dual I/O
Quad I/O
Max Clock
(SDI)
(SQI)
Frequency
Yes
Yes
20 MHz
Yes
Yes
20 MHz
Description:
The Microchip Technology Inc. 23A1024/23LC1024
are 1 Mbit Serial SRAM devices. The memory is
accessed via a simple Serial Peripheral Interface (SPI)
compatible serial bus. The bus signals required are a
clock input (SCK) plus separate data in (SI) and data
out (SO) lines. Access to the device is controlled
through a Chip Select (CS) input. Additionally, SDI
(Serial Dual Interface) and SQI (Serial Quad Interface)
is supported if your application needs faster data rates.
This device also supports unlimited reads and writes to
the memory array.
The 23A1024/23LC1024 is available in standard
packages including 8-lead SOIC, PDIP and advanced
8-lead TSSOP.
Package Types (not to scale)
SOIC/TSSOP/PDIP
CS
1
SO/SIO1
2
SIO2
3
Vss
4
Preliminary
Packages
SN, ST, P
SN, ST, P
8
Vcc
7
HOLD/SIO3
6
SCK
5
SI/SIO0
DS25142A-page 1

Summary of Contents

Page 1

... Dual Interface) and SQI (Serial Quad Interface) is supported if your application needs faster data rates. This device also supports unlimited reads and writes to the memory array. The 23A1024/23LC1024 is available in standard packages including 8-lead SOIC, PDIP and advanced 8-lead TSSOP. Package Types (not to scale) ...

Page 2

... V can be lowered without losing RAM data. This parameter is periodically Preliminary 0.3V CC Test Conditions 23A1024 23LC1024 23A1024 23LC1024 -400  OUT MHz ...

Page 3

... AC Waveform: Input pulse level 0 Input rise/fall time Operating temperature -40° 85° Timing Measurement Reference Level: Input 0.5 V Output 0.5 V 2011 Microchip Technology Inc. 23A1024/23LC1024 Industrial (I -40° 85° Min. Max. Units 20 MHz 25 — ...

Page 4

... FIGURE 1-1: HOLD TIMING CS 15 SCK HOLD FIGURE 1-2: SERIAL INPUT TIMING (SPI MODE SCK MSB in High-Impedance SO FIGURE 1-3: SERIAL OUTPUT TIMING (SPI MODE SCK 12 MSB out SO SI DS25142A-page High-Impedance n Dont Care ...

Page 5

... Read Sequence The device is selected by pulling CS low. The 8-bit READ instruction is transmitted to the 23A1024/ 23LC1024 followed by the 24-bit address, with the first seven MSBs of the address being a dont care bit. 2011 Microchip Technology Inc. 23A1024/23LC1024 After the correct READ instruction and address are sent, the data stored in the memory at the selected address is shifted out on the SO pin ...

Page 6

... TABLE 2-1: INSTRUCTION SET Instruction Name Instruction Format READ 0000 0011 WRITE 0000 0010 EDIO 0011 1011 EQIO 0011 1000 RSTIO 1111 1111 RDMR 0000 0101 WRMR 0000 0001 FIGURE 2-1: BYTE READ SEQUENCE (SPI MODE SCK Instruction ...

Page 7

... SCK Page X, Word Y 2011 Microchip Technology Inc. 23A1024/23LC1024 24-bit Address Page X, Word Y Page X, Word ...

Page 8

... FIGURE 2-5: SEQUENTIAL READ SEQUENCE (SPI MODE SCK Instruction SCK SI Page X, Word SCK SI Page X1, Word DS25142A-page ...

Page 9

... SCK Data Byte 2011 Microchip Technology Inc. 23A1024/23LC1024 24-bit Address Data Byte ...

Page 10

... Read Mode Register Instruction (RDMR) The Read Mode Register instruction (RDMR) provides access to the MODE register. The MODE register may be read at any time. The MODE register is formatted as follows: TABLE 2-2: MODE REGISTER W/R W/R MODE MODE ...

Page 11

... SCK Instruction 2.7 Power-On State The 23A1024/23LC1024 powers on in the following state: The device is in low-power Standby mode ( A high-to-low-level transition required to enter active state 2011 Microchip Technology Inc. 23A1024/23LC1024 for the ...

Page 12

... Serial Output (SO) The SO pin is used to transfer data out of the 23A1024/ 23LC1024. During a read cycle, data is shifted out on this pin after the falling edge of the serial clock. 3.3 Serial Input (SI) The SI pin is used to transfer data into the device. It receives instructions, addresses, and data ...

Page 13

... Vcc SIO1 2 7 HOLD SCK Vss 4 5 SIO0 SQI Mode Vcc SIO1 2 7 SIO3 SIO2 3 6 SCK Vss 4 5 SIO0 Note: Pin 3 should not be left floating when not using SQI Operation. 2011 Microchip Technology Inc. 23A1024/23LC1024 Preliminary DS25142A-page 13 ...

Page 14

... DS25142A-page 14 4.1 Dual Interface Mode The 23A1024/23LC1024 supports Serial Dual Input (SDI) mode of operation. To enter SDI mode the EDIO command must be clocked in noted that if the MCU resets before the SRAM, the user will need to determine the serial mode of operation of the SRAM and reset it accordingly. Byte read and write ...

Page 15

... Instruction SIO1 1 Note: Page and Sequential mode are similar in that additional bytes can be clocked in before CS is brought high. 2011 Microchip Technology Inc. 23A1024/23LC1024 24-Bit Address ...

Page 16

... FIGURE 4-4: ENTER SQI MODE (EQIO) FROM SPI MODE CS SCK SI SO 4.3 Exit SDI or SQI Mode To exit from SDI mode, the RSTIO command must be issued. The command must be entered in the current device configuration, either SDI or SQI, see and Figure 4-8. FIGURE 4-5: BYTE READ MODE SQII ...

Page 17

... Instruction Note: Page and Sequential mode are similar in that additional bytes can be clocked out before CS is brought high. FIGURE 4-7: RESET SDI MODE (RSTIO) FROM SDI MODE CS SCK SIO0 SIO1 2011 Microchip Technology Inc. 23A1024/23LC1024 ...

Page 18

... FIGURE 4-8: RESET SDI/SQI MODE (RSTIO) FROM SQI MODE CS SCK SIO0 SIO1 SIO2 SIO3 DS25142A-page Preliminary 2011 Microchip Technology Inc. ...

Page 19

... Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. 2011 Microchip Technology Inc. 23A1024/23LC1024 Example 23A1024 I/P 1L7 e 3 0528 ...

Page 20

... PLO %RG >3',3@ 1RWH N NOTE 1RWHV DS25142A-page Preliminary c 2011 Microchip Technology Inc. ...

Page 21

... Note: 2011 Microchip Technology Inc. 23A1024/23LC1024 Preliminary DS25142A-page 21 ...

Page 22

... Note: DS25142A-page 22 Preliminary 2011 Microchip Technology Inc. ...

Page 23

... PP %RG >62,&@ 1RWH 2011 Microchip Technology Inc. 23A1024/23LC1024 Preliminary DS25142A-page 23 ...

Page 24

... PP %RG >76623@ 1RWH NOTE 1RWHV DS25142A-page Preliminary φ L 2011 Microchip Technology Inc. ...

Page 25

... Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging 2011 Microchip Technology Inc. 23A1024/23LC1024 Preliminary DS25142A-page 25 ...

Page 26

... APPENDIX A: REVISION HISTORY Revision A (July 2012) Initial release. DS25142A-page 26 Preliminary 2011 Microchip Technology Inc. ...

Page 27

... To register, access the Microchip web site at www.microchip.com. Under Support, Customer Change Notification and follow the registration instructions. 2012 Microchip Technology Inc. 23A1024/23LC1024 CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: Distributor or Representative Local Sales Office the following • ...

Page 28

... Telephone: (___) ___ - ___ Application (optional): Would you like a reply? Y Device: 23A1024/23LC1024 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this document easy to follow? If not, why? 4 ...

Page 29

... Plastic PDIP (300 mil body), 8-lead 2012 Microchip Technology Inc. 23A1024/23LC1024 /XX X Examples: Package Preliminary 23A1024-I/ Mbit, 1.7 - 2.2V Serial SRAM, Industrial temp., TSSOP package 23LC1024-I/ Mbit, 2.5-5.5V Serial SRAM, Industrial temp., Tape & Reel, SOIC package 23LC1024-I Mbit, 2.5-5.5V Serial SRAM, Industrial temp., PDIP package DS25142A-page 29 ...

Page 30

... NOTES: DS25142A-page 30 Preliminary 2012 Microchip Technology Inc. ...

Page 31

... Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2012, Microchip Technology Incorporated, Printed in the U ...

Page 32

... Tel: 886-7-536-4818 Fax: 886-7-330-9305 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 Preliminary 2012 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris ...

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