Siemens SLA24C164-D-3-P, SLA24C164-D-P, SLA24C164-S-3-P, SLA24C164-S-P, SLE24C164-D-P Datasheet

...

Standard EEPROM ICs

SLx 24C164/P 16 Kbit (2048 × 8bit)

Serial CMOS-EEPROM with

C Synchronous 2-Wire Bus

and Page Protection Mode

Data Sheet 1998-07-27

™

SLx 24C164/P Revision History: Current Version: 1998-07-27

Previous Version: 06.97 Page

(in previous Version)

Page (in current Version)

Subjects (major changes since last revision)

3 3 Text was changed to “Typical programming time 5 ms for up to

16 bytes”. 55WP= 11, 12 11, 12 The erase/write cycle is finished latest after 10

protects the upper half entire memory.

8ms. 15 15 Figure 11: second command byte is a CSR and not CSW. 21 21 The write or erase cycle is finished latest after 10

4ms. 19 24 “Capacitive l oad …” were added. 25 25 Some timings were changed. 25 25 The line “erase/write cycle” was removed. 25 25 Chapter 8.4 “Erase and Write Characteristics” has been added.

I2CBus

Purchase of Siemens I

C system p rovided the system conforms to the I2C specifications defined by Philips.

the I

C components conveys the license under the Philips I2C patent to use the components in

Edition 1998-07-27 Published by Siemens AG,

Bereich Halbleiter, MarketingKommunikation, Balanstraße 73, 81541 München

Siemens AG 1998.

Attention please!

As far as patents or other rights of third parties are concerned, liability is only assumed for components, not for applications, processes and circuits implemented within components or assemblies.

The information describes the type of component and shall not be considered as assured characteristics. Terms of delivery and rights to change design reserved. For questions on technology, delivery and prices please contact the Semiconductor Group Offices in Germany or the Siemens Companies

and Representatives worldwide (see address list). Due to technical requirements components may contain dangerous substances. For information on the types in question please contact

your nearest Siemens Office, Semiconductor Group. Siemens AG is an approved CECC manufacturer.

Packing

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For pa cking material that is returned to us unsorted or which we are not obliged to accept, we shall have to invoice you for any costs incurred.

Components used in life-support devices or systems must be expressly authorized for such purpose!

Critical components written appr oval of the Semiconductor Group of Siemens AG.

1 A critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the

failure of that life-support device or system, or to affect its safety or effectiveness of that device or system.

2 Life support devices or systems are intended (a) to be implanted in the human body, or (b) to support and/or maintain and sustain hu-

man life. If they fail, it is reasonable to assume that the health of the user may be endangered.

of the Semiconductor Group of Siemens AG, may only be used in life-support devices or systems2with the express

16 Kbit (2048 × 8bit)SerialCMOS

EEPROMs, I Page Protection Mode

Features

• Data EEPROM internally organized as

2048 bytes and 128 pages × 16 bytes

• Page protection mode, flexible page-by-page hardware write protection

– Additional protection EEPROM of 128 bits, 1 bit

per data page

– Protection setting for each data page by writing its

protection bit

– Protection managementwithoutswitching WPpin

• Low power CMOS

C Synchronous 2-Wire Bus,

™

SLx 24C164/P

P-DIP-8-4

•

• Two wire serial interface bus, I

= 2.7 to 5.5 V operation

C-Bus

compatible

• Three chip select pins to address 8 devices

• Filtered inputs for noise suppression with Schmitt trigger

P-DSO-8-3

• Clock frequency up to 400 kHz

• High programming flexibility

– Internal programming voltage – Self timed programming cycle including erase – Byte-write and page-write programming, between 1 and 16 bytes – Typical programming time 5 ms for up to 16 bytes

• High reliability

– Endurance 10

cycles

– Data retention 40 years

– ESD protection 4000 V on all pins

• 8 pin DIP/DSO packages

• Available for extended temperature ranges

– Industrial: − 40 °C to + 85 °C – Automotive: − 40°C to + 125 °C

Values are temperature dependent, for further information please refer to your Siemens Sales office.

Semiconductor Group 3 1998-07-27

SLx 24C164/P

Ordering Information Type Ordering Code Package Temperature Voltage

SLA 24C164-D/P Q67100-H3504 P-DIP-8-4 – 40 °C … + 85 °C 4.5 V...5.5 V SLA 24C164-S/P Q67100-H3499 P-DSO-8-3 – 40 °C … + 85 °C 4.5 V...5.5 V SLA 24C164-D-3/P Q67100-H3502 P-DIP-8-4 – 40 °C … + 85 °C 2.7 V...5.5 V SLA 24C164-S-3/P Q67100-H3498 P-DSO-8-3 – 40 °C … + 85 °C 2.7 V...5.5 V SLE 24C164-D/P Q67100-H3503 P-DIP-8-4 – 40°C … + 125 °C 4.5 V...5.5 V SLE 24C164-S/P Q67100-H3497 P-DSO-8-3 – 40°C … + 125 °C 4.5 V...5.5 V

Other types are available on request

– Temperature range (– 55 °C … + 150 °C) – Package (die, wafer delivery)

1 Pin Configuration

P-DSO-8-3

CS0

CS1

CS2

1 2 3 4

IEP02124

CS0

CS1

CS2

P-DIP-8-4

IEP02125

WP SCL63

SDA54

Figure 1 Pin Configuration (top view)

Pin Definitions and Functions Table 1 Pin No. Symbol Function

1, 2, 3 CS0, CS1, CS2 Chip select inputs

SCL SDA

Ground 5 SDA Serial bidirectional data bus 6 SCL Serial clock input 7 WP Write protection input 8

Semiconductor Group 4 1998-07-27

Supply voltage

SLx 24C164/P

Pin Description

Serial Clock (SCL)

The SCL input is used to clock data into the device on the rising edge and to clock data out of the device on the falling edge.

Serial Data (SDA)

SDA is a bidirectional pin used to transfer addresses, data or control information into the device or to transfer data out of the device. The output is open drain, performing a wired AND function with any number of other open drain or open collector devices. The SDA

bus requires a pull-up resistor to

Chip Select (CS0, CS1, CS2)

The CS0, CS1 and CS2 pins are chip select inputs either hard wired or actively driven

or VSS. These inputs allow the selection of one of eight possible devices sharing

acommonbus.

Write Protection (WP)

WP switched to WP switched to

allows normal read/write operations.

protects the entire EEPROM against changes (hardware write

protection). Additionally write protection is managed by a protection bit associated to each page.

(refer to chapter 7 Page Protection Mode

)

Semiconductor Group 5 1998-07-27

2 Description

SLx 24C164/P

The SLx 24C164/P device is a serial e

emory (EEPROM), organized as 2048 × 8 bit. The data memory is divided into

lectrically erasable and programmable read only

128 pages. The 16 bytes of a page can be programmed simultaneously. Each page may be protected individually against changes by its associated protection bit.

The device conforms to the specification of the 2-wire serial I

pins allow the addressing of 8 devices on the I

C-Bus. Low voltage design permits

C-Bus. Three chip select

operation down to 2.7 V with low active and standby currents. All devices have a

minimum endurance of 10

erase/write cycles.

The device operates at 5.0 V ± 10% with a maximum clock frequency of 400 kHz and at

2.7 ... 4.5 V with a maximum clock frequency of 100 kHz. The device is available as 5 V

type ( applications and as 3 V type (

= 4.5 … 5.5 V) with two temperature ranges for industrial and automotive

= 2.7 … 5.5 V) for industrial applications. The

EEPROMs are mounted in eight-pin DIP and DSO packages or are also supplied as chips.

CS0 CS1 CS2

SCL

SDA

Start/

Stop

Logic

Chip Address

Control

Logic

Serial

Control

Logic

Address

Logic

Programming

Control

H.V. Pump

EEPROM

DEC

Page Logic

Dout/ACK

Page

Prot. Bit

EEPROM

Y DEC

IEB02271

Figure 2 Block Diagram

Semiconductor Group 6 1998-07-27

SLx 24C164/P

3 I2C-Bus Characteristics

The SLx 24C164/P devices support a master/slave bidirectional bus oriented protocol in which the EEPROM always takes the role of a slave.

Slave 1 Slave 2 Slave 3 Slave 4

SCL

Master

SDA

Slave 8Slave 5 Slave 6 Slave 7

IES02183

Figure 3 Bus Configuration

Master Device that initiates the transfer of data and provides the clock for both

transmit and receive operations.

Slave Device addressed by the master, capable of receiving and transmitting

data.

Transmitter The device with the SDA as output is defined as the transmitter. Due to

the open drain characteristic of the SDA output the device applying a low level wins.

Receiver The device with the SDA as input is defined as the receiver.

Semiconductor Group 7 1998-07-27

SLx 24C164/P

The conventions for the serial clock line and the bidirectional data line are shown in figure 4.

SCL

SDA

START Condition Data allowed STOP Condition

to Change

Acknowledge

ACK ACK

IED02128

Figure 4

C-Bus Timing Conventions for START Condition, STOP Condition, Data Valida-

tion and Transfer of Acknowledge ACK

Standby Mode in which the bus is not busy (no serial transmission, no

programming): both clock (SCL) and data line (SDA) are in high state. The device enters the standby mode after a STOP condition or after a programming cycle.

START Condition High to low transition of SDA when SCL is high, preceding all

commands.

STOP Condition Low to high transition of SDA when SCL is high, terminating all

communications. A STOP condition initiates an EEPROM programming cycle. A STOP condition after reading a data byte from the EEPROM initiates the Standby mode.

Acknowledge A successful reception of eight data bits is indicated by the

receiver by pulling down the SDA line during the following clock cycle of SCL (ACK). The transmitter on the other hand has to release the SDA line after the transmission of eight data bits. The EEPROM as the receiving device responds with an acknowledge, when addressed. The master, on the other side, acknowledges each data byte transmitted by the EEPROM and can at any time end a read operation by releasing the SDA line (no ACK) followed by a STOP condition.

Data Transfer Data must change only during low SCL state, data remains valid

on the SDA bus during high SCL state. Nine clock pulses are required to transfer one data byte, the most significant bit (MSB) is transmitted first.

Semiconductor Group 8 1998-07-27

SLx 24C164/P

4 Device Addressing and EEPROM Addressing

After a START condition, the master always transmits a Command Byte CSW or CSR. After the acknowledge of the EEPROM a Control Byte follows, its content and the transmitter depend on the previous Command Byte. The description of the Command and Control Bytes is shown in table 2.

Command Byte Selects one of the 8 addressable devices: the chip select bits c2,

and c0 (bit positions b6 to b4) are compared to their

c1 corresponding hard wired input pins CS2, CS1 and CS0, respectively (c1

Selects operation: the least significant bit b0 is low for a write operation (C read operation (C

Contains address information: in the CSW Command Byte, the bit positions b3 to b1 are decoded for the three uppermost EEPROM address bits A10, A9, A8 (in the CSR Command Byte, the bit positions b3 to b1 are left undefined).

is the complement of CS1 pin).

hip Select Write Command Byte CSW) or set high for a

hip Select Read Command Byte CSR).

Control Byte Following CSW (b0 = 0): contains the eight lower bits of the

EEPROM address (EEA) bit A7 to A0, or an additional command byte for the handling of the protection bit.

Following CSR (b0 = 1): contains the data read out, transmitted by the EEPROM. The EEPROM data are read as long as the master pulls down SDA after each byte in order to acknowledge the transfer. The read operation is stopped by the master by releasing SDA (no acknowledge is applied) followed by a STOP condition.

Table 2

Command and Control Byte for I

C-Bus Addressing of Chip and EEPROM

Definition Function

b7 b6 b5 b4 b3 b2 b1 b0

CSW 1 c2 c1 CSR 1 c2 c1

c0A10A9A80 ChipSelectforWrite c0 x x x 1 Chip Select for Read

EEA A7 A6 A5 A4 A3 A2 A1 A0 EEPROM address The device has an internal address counter which points to the current EEPROM

address. The address counter is incremented

– after a data byte to be written has been acknowledged, during entry of further data

byte

– during a byte read, thus the address counter points to the following address after

reading a data byte.

Semiconductor Group 9 1998-07-27

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