Philips pcf85xxc DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

PCF85xxC-2 family

256 to 1024 × 8-bit CMOS EEPROMs with I

Product speciﬁcation File under Integrated Circuits, IC12

C-bus interface

1997 Feb 13

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

1 FEATURES 2 GENERAL DESCRIPTION 3 QUICK REFERENCE DATA 4 ORDERING INFORMATION 5 DEVICE SELECTION 6 BLOCK DIAGRAM 7 PINNING

7.1 Pin description PCF8582C-2

7.2 Pin description PCF8594C-2

7.3 Pin description PCF8598C-2 8I

8.1 Bus conditions

8.2 Data transfer

8.3 Device addressing

8.4 Write operations

8.4.1 Byte/word write

8.4.2 Page write

8.4.3 Remark

8.5 Read operations

8.5.1 Remark

C-BUS PROTOCOL

9 LIMITING VALUES 10 CHARACTERISTICS 11 I2C-BUS CHARACTERISTICS 12 WRITE CYCLE LIMITS 13 EXTERNAL CLOCK TIMING 14 PACKAGE OUTLINES 15 SOLDERING

15.1 Introduction

15.2 DIP

15.2.1 Soldering by dipping or by wave

15.2.2 Repairing soldered joints

15.3 SO

15.3.1 Reflow soldering

15.3.2 Wave soldering

15.3.3 Repairing soldered joints 16 DEFINITIONS 17 LIFE SUPPORT APPLICATIONS 18 PURCHASE OF PHILIPS I2C COMPONENTS

PCF85xxC-2 family

1997 Feb 13 2

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

1 FEATURES

• Low power CMOS: – maximum operating current:

2.0 mA (PCF8582C-2)

2.5 mA (PCF8594C-2)

4.0 mA (PCF8598C-2)

– maximum standby current 10 µA (at 6.0 V),

typical 4 µA

• Non-volatile storage of: – 2 kbits organized as 256 × 8-bit (PCF8582C-2) – 4 kbits organized as 512 × 8-bit (PCF8594C-2) – 8 kbits organized as 1024 × 8-bit (PCF8598C-2)

• Single supply with full operation down to 2.5 V

• On-chip voltage multiplier

• Serial input/output I

• Write operations:

– byte write mode – 8-byte page write mode

(minimizes total write time per byte)

• Read operations: – sequential read – random read

• Internal timer for writing (no external components)

• Power-on-reset

C-bus

PCF85xxC-2 family

• High reliability by using a redundant storage code

• Endurance: 1000000 Erase/Write (E/W) cycles at

=22°C

amb

• 10 years non-volatile data retention time

• Pin and address compatible to: PCF8570, PCF8571,

PCF8572 and PCF8581.

2 GENERAL DESCRIPTION

The PCF85xxC-2 is a family of floating gate Electrically Erasable Programmable Read Only Memories (EEPROMs) with 2, 4 and 8 kbits (256, 512 and 1024 × 8-bit). By using an internal redundant storage code it is fault tolerant to single bit errors. This feature dramatically increases the reliability compared to conventional EEPROMs. Power consumption is low due to the full CMOS technology used. The programming voltage is generated on-chip, using a voltage multiplier.

As data bytes are received and transmitted via the serial

C-bus, a package using eight pins is sufficient. Up to

I eight PCF85xxC-2 devices may be connected to the I2C-bus. Chip select is accomplished by three address inputs (A0, A1 and A2).

Timing of the E/W cycle is carried out internally, thus no external components are required. Pin 7 (PTC) must be connected to either VDD or left open-circuit. There is an option of using an external clock for timing the length of an E/W cycle.

3 QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

DDR

DDW

DD(stb)

supply voltage 2.5 6.0 V supply current read f

supply current E/W f

PCF8582C-2 V

PCF8594C-2 V

PCF8598C-2 V

= 100 kHz

SCL

= 2.5 V − 60 µA

=6V − 200 µA

= 100 kHz

SCL

= 2.5 V − 0.6 mA

=6V − 2.0 mA

= 2.5 V − 0.8 mA

=6V − 2.5 mA

= 2.5 V − 1.0 mA

=6V − 4.0 mA

standby supply current VDD= 2.5 V − 3.5 µA

=6V − 10 µA

1997 Feb 13 3

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

4 ORDERING INFORMATION

TYPE

NUMBER

PCF8582C-2P

PCF8598C-2P PCF8582C-2T PCF8594C-2T PCF8598C-2T SO8 plastic small outline package; 8 leads; body width 7.5 mm SOT176-1

5 DEVICE SELECTION Table 1 Device selection code

SELECTION DEVICE CODE CHIP ENABLE R/

Bit b7 Device 1 0 1 0 A2 A1 A0 R/

NAME DESCRIPTION VERSION

DIP8 plastic dual in-line package; 8 leads (300 mil) SOT97-1PCF8594C-2P

SO8 plastic small outline package; 8 leads (straight); body width 3.9 mm SOT96-1

(1)

b6 b5 b4 b3 b2 b1 b0

PACKAGE

PCF85xxC-2 family

Note

1. The Most Significant Bit (MSB) ‘b7’ is sent first.

1997 Feb 13 4

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

6 BLOCK DIAGRAM

( 128)

DIVIDER

SEQUENCER

EE

CONTROL

PTC

( 16)

TIMER

PCF85xxC-2 family

MGD927

OSCILLATOR

C-BUS CONTROL LOGIC

HIGH

ADDRESS

EEPROM

POINTER

ADDRESS

PCF85xxC-2

handbook, full pagewidth

Fig.1 Block diagram.

BYTE

INPUT

FILTER

COUNTER

BYTE

LATCH

(8 bytes)

SHIFT

SWITCH

ADDRESS

TEST MODE DECODER

321

POWER-ON-RESET

SCL

SDA

1997 Feb 13 5

The pin numbers in this block diagram refer to the PCF8582C-2.

For PCF8594C-2 and PCF8598C-2 please see Chapter 7.

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

7 PINNING

7.1 Pin description PCF8582C-2

SYMBOL PIN DESCRIPTION

A0 1 address input 0 A1 2 address input 1 A2 3 address input 2 V

SDA 5 serial data input/output (I SCL 6 serial clock input (I PTC 7 programming time control output V

7.2 Pin description PCF8594C-2

SYMBOL PIN DESCRIPTION

WP 1 write-protection input A1 2 address input 1 A2 3 address input 2 V

SDA 5 serial data input/output (I SCL 6 serial clock input (I PTC 7 programming time control output V

4 negative supply voltage

C-bus)

8 positive supply voltage

4 negative supply voltage

C-bus)

8 positive supply voltage

C-bus)

handbook, halfpage

Fig.2 Pin configuration PCF8582C-2.

handbook, 2 columns

Fig.3 Pin configuration PCF8594C-2.

A1 A2

A0 A1 A2

PCF85xxC-2 family

1 2

PCF8582C-2

3 4

1 2

PCF8594C-2

3 4

MGD928

MGL001

PTC

SCL

6 5

SDA

PTC

SCL

6 5

SDA

7.3 Pin description PCF8598C-2

SYMBOL PIN DESCRIPTION

WP 1 write-protection input n.c. 2 not connected A2 3 address input 2 V

SDA 5 serial data input/output (I SCL 6 serial clock input (I

4 negative supply voltage

C-bus)

PTC 7 programming time control output V

8 positive supply voltage

1997 Feb 13 6

handbook, halfpage

Fig.4 Pin configuration PCF8598C-2.

n.c.

1 2

PCF8598C-2

3 4

MGL002

PTC

SCL

6 5

SDA

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

8I2C-BUS PROTOCOL

The I2C-bus is for 2-way, 2-line communication between different ICs or modules. The serial bus consists of two bidirectional lines: one for data signals (SDA), and one for clock signals (SCL).

Both the SDA and SCL lines must be connected to a positive supply voltage via a pull-up resistor.

The following protocol has been defined:

• Data transfer may be initiated only when the bus is not busy.

• During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in the data line while the clock line is HIGH will be interpreted as control signals.

8.1 Bus conditions

The following bus conditions have been defined:

• Bus not busy: both data and clock lines remain HIGH.

• Start data transfer: a change in the state of the data

line, from HIGH-to-LOW, while the clock is HIGH, defines the START condition.

• Stop data transfer: a change in the state of the data line, from LOW-to-HIGH, while the clock is HIGH, defines the STOP condition.

• Data valid: the state of the data line represents valid data when, after a START condition, the data line is stable for the duration of the HIGH period of the clock signal. There is one clock pulse per bit of data.

8.2 Data transfer

PCF85xxC-2 family

Data transfer is unlimited in the read mode. The information is transmitted in bytes and each receiver acknowledges with a ninth bit.

Within the I clock rate) and a high speed mode (100 kHz clock rate) are defined. The PCF85xxC-2 operates in both modes.

By definition a device that sends a signal is called a ‘transmitter’, and the device which receives the signal is called a ‘receiver’. The device which controls the signal is called the ‘master’. The devices that are controlled by the master are called ‘slaves’.

Each byte is followed by one acknowledge bit. This acknowledge bit is a HIGH level, put on the bus by the transmitter. The master generates an extra acknowledge related clock pulse. The slave receiver which is addressed is obliged to generate an acknowledge after the reception of each byte.

The master receiver must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter.

The device that acknowledges has to pull down the SDA line during the acknowledge clock pulse in such a way that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse.

Set-up and hold times must be taken into account. A master receiver must signal an end of data to the slave transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event the transmitter must leave the data line HIGH to enable the master generation of the STOP condition.

C-bus specifications a low-speed mode (2 kHz

Each data transfer is initiated with a START condition and terminated with a STOP condition. The number of the data bytes, transferred between the START and STOP conditions is limited to 7 bytes in the E/W mode and 8 bytes in the page E/W mode.

1997 Feb 13 7

Philips Semiconductors Product speciﬁcation

256 to 1024 × 8-bit CMOS EEPROMs with

C-bus interface

8.3 Device addressing

Following a START condition the bus master must output the address of the slave it is accessing. The 4 MSBs of the slave address are the device type identifier (see Fig.5). For the PCF85xxC-2 this is fixed to ‘1010’.

The next three significant bits address a particular device or memory page (page = 256 bytes of memory). A system could have up to eight PCF8582C-2 (or four PCF8594C-2 containing two memory pages each or two PCF8598C-2 containing four memory pages each, respectively) devices on the bus. The eight addresses are defined by the state of the A0, A1 and A2 inputs.

The last bit of the slave address defines the operation to be performed. When set to logic 1 a read operation is selected.

MBC793

or VSS.

Address bits must be connected to either V

handbook, halfpage

8.4 Write operations

8.4.1 BYTE/WORD WRITE

For a write operation the PCF85xxC-2 requires a second address field. This address field is a word address providing access to the 256 words of memory. Upon receipt of the word address the PCF85xxC-2 responds with an acknowledge and awaits the next eight bits of data, again responding with an acknowledge. Word address is automatically incremented. The master can now terminate the transfer by generating a STOP condition or transmit up to six more bytes of data and then terminate by generating a STOP condition.

1010A2A1A0R/W

Fig.5 Slave address.

PCF85xxC-2 family

After this STOP condition the E/W cycle starts and the bus is free for another transmission. Its duration is 10 ms per byte.

During the E/W cycle the slave receiver does not send an acknowledge bit if addressed via the I2C-bus.

8.4.2 P The PCF85xxC-2 is capable of an eight-byte page write

operation. It is initiated in the same manner as the byte write operation. The master can transmit eight data bytes within one transmission. After receipt of each byte the PCF85xxC-2 will respond with an acknowledge. The typical E/W time in this mode is 9 × 3.5 ms = 31.5 ms. Erasing a block of 8 bytes in page mode takes typical

3.5 ms and sequential writing of these 8 bytes another typical 28 ms.

After the receipt of each data byte the three low order bits of the word address are internally incremented. The high order five bits of the address remain unchanged. The slave acknowledges the reception of each data byte with an ACK. The I master after the 8th byte with a STOP condition. If the master transmits more than eight bytes prior to generating the STOP condition, no acknowledge will be given on the ninth (and following) data bytes and the whole transmission will be ignored and no programming will be done. As in the byte write operation, all inputs are disabled until completion of the internal write cycles.

8.4.3 R A write to the EEPROM is always performed if the pin WP

is LOW (not on PCF8582C-2). If WP is HIGH, then the upper half of the EEPROM is write-protected and no acknowledge will be given by the PCF85xxC-2 when one of the upper 256 EEPROM bytes (PCF8594C-2) or 512 EEPROM bytes (PCF8598C-2) is addressed. However, an acknowledge will be given after the slave address and the word address.

AGE WRITE

C-bus data transfer is terminated by the

EMARK

1997 Feb 13 8

+ 16 hidden pages

Philips pcf85xxc DATASHEETS

CONTENTS

1 FEATURES

2 GENERAL DESCRIPTION

3 QUICK REFERENCE DATA

4 ORDERING INFORMATION

5 DEVICE SELECTION Table 1 Device selection code

6 BLOCK DIAGRAM

7 PINNING

7.1 Pin description PCF8582C-2

7.2 Pin description PCF8594C-2

7.3 Pin description PCF8598C-2

8I2C-BUS PROTOCOL

8.1 Bus conditions

8.2 Data transfer

8.3 Device addressing

8.4 Write operations