Datasheet om5234 DATASHEETS (Philips)

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INTEGRATED CIRCUITS

OM5234/OM5284

CMOS single-chip 8-bit microcontrollers

Preliminary specification 1996 Nov 01

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Page 2

Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

DESCRIPTION

The OM5234 and OM5284 single-chip 8-bit microcontrollers are manufactured in an advanced CMOS process and are derivatives of the 80C51 microcontroller family . The OM5234 and OM5284 are pre-programmed devices for specific applications. Unless specifically stated otherwise, all references to OM5234 apply equally to OM5284.

The OM5234 contains a non-volatile 16k × 8 read-only program memory, a volatile 256 × 8 read/write data memory, four 8-bit I/O ports, two 16-bit timer/event counters (identical to the timers of the 80C51), a multi-source, two-priority-level, nested interrupt structure, UART and on-chip oscillator and timing circuits.

FEA TURES

•80C51 central processing unit

•6k × 8 ROM

•256 × 8 RAM

•Two standard 16-bit timer/counters

•Four 8-bit I/O ports

•Full-duplex UART facilities

•Power control modes

– Idle mode – Power-down mode

•ROM code protection

ORDERING INFORMATION

OM5234 F T P

Device

OM5234

Frequency Range

F = 3.5 to 16MHz I = 3.5 to 24MHz

T emperature Range

/ YYY

ROM code for application

5XX, etc.

Package designator

A = Plastic Leaded Chip Carrier B = Plastic Quad Flat Package

Device

OM5284

Frequency Range

E = 3.5 to 16MHz I = 3.5 to 24MHz

P = Plastic Dual In-Line Package

B = 0 to 70°C

PART NUMBER

TEMPERATURE RANGE °C

AND PACKAGE

OM5234/FBB/YYY 0 to 70°C, Plastic Quad Flat Package 16 SOT307-2 OM5234/FBP/YYY 0 to 70°C, Plastic Dual In-Line Package 16 SOT129-1 OM5234/FBA/YYY 0 to 70°C, Plastic Leaded Chip Carrier 16 SOT187-2 OM5284EBYY 0 to 70°C, Plastic Quad Flat Package 16 SOT307-2 OM5284EA YY 0 to 70°C, Plastic Leaded Chip Carrier 16 SOT187-2 OM5284EPYY 0 to 70°C, Plastic Dual In-Line Package 16 SOT129-1

OM5284 X Y ZZ

ROM code for application

01, 02, 03

Package designator

A = Plastic Leaded Chip Carier B = Plastic Quad Flat Package P = Plastic Dual In-Line Package

FREQUENCY

(MHz)

DRAWING

NUMBER

LOGIC SYMBOL

1996 Nov 01

RST XTAL1 XTAL2

PSEN

ALE

ALTERNATE

FUNCTIONS

RxD

TxD

INT0 INT1

T0 T1

VSSV

ADDRESS AND

PORT 0

PORT 3

PORT 1PORT 2

DATA BUS

ADDRESS BUS

SU00800

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Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

PIN CONFIGURATIONS DUAL IN-LINE PACKAGE

PIN FUNCTIONS

P1.0 P1.1

2 3

P1.2

P1.3

P1.4

P1.5

P1.6 P1.7

8 9

RST

P3.0/RxD

P3.1/TxD P3.2/INT0 P3.3/INT1

P3.4/T0 P3.5/T1

P3.6/WR

P3.7/RD

XTAL2 XTAL1

11 12 13 14 15 16 17 18 19 20

IN-LINE

PACKAGE

DUAL

39 38 37 36 35 34 33 32 31

30 29 28 27 26

25 24 23 22

P0.0/AD0 P0.1/AD1 P0.2/AD2 P0.3/AD3 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 EA

ALE PSEN P2.7/A15 P2.6/A14 P2.5/A13

P2.4/A12 P2.3/A11 P2.2/A10 P2.1/A9 P2.0/A8

SU00802

PLASTIC LEADED CHIP CARRIER PIN FUNCTIONS

6140

PLCC

18 28

Pin Function

1 NC* 2 P1.0 3 P1.1 4 P1.2 5 P1.3 6 P1.4 7 P1.5 8 P1.6

9 P1.7 10 RST 11 P3.0/RxD 12 NC* 13 P3.1/TxD 14 P3.2/INT0 15 P3.3/INT1

* DO NOT CONNECT

Pin Function

16 P3.4/T0 17 P3.5/T1 18 P3.6/WR 19 P3.7/RD 20 XTAL2 21 XTAL1 22 V

23 NC* 24 P2.0/A8 25 P2.1/A9 26 P2.2/A10 27 P2.3/A11 28 P2.4/A12 29 P2.5/A13 30 P2.6/A14

PLASTIC QUAD FLAT PACK PIN FUNCTIONS

44 34

Pin Function

31 P2.7/A15 32 PSEN 33 ALE 34 NC* 35 EA 36 P0.7/AD7 37 P0.6/AD6 38 P0.5/AD5 39 P0.4/AD4 40 P0.3/AD3 41 P0.2/AD2 42 P0.1/AD1 43 P0.0/AD0 44 V

SU00798

1996 Nov 01

Pin Function

1 P1.5 2 P1.6 3 P1.7 4 RST 5 P3.0/RxD 6V

SS4

7 P3.1/TxD 8 P3.2/INT0

9 P3.3/INT1 10 P3.4/T0 11 P3.5/T1 12 P3.6/WR 13 P3.7/RD 14 XTAL2 15 XTAL1

PQFP

12 22

Pin Function

16 V

SS1

17 NC* 18 P2.0/A8 19 P2.1/A9 20 P2.2/A10 21 P2.3/A11 22 P2.4/A12 23 P2.5/A13 24 P2.6/A14 25 P2.7/A15 26 PSEN 27 ALE 28 V

SS2

29 EA/V 30 P0.7/AD7

Pin Function

31 P0.6/AD6 32 P0.5/AD5 33 P0.4/AD4 34 P0.3/AD3 35 P0.2/AD2 36 P0.1/AD1 37 P0.0/AD0 38 V

39 V

SS3

40 P1.0 41 P1.1 42 P1.2 43 P.13 44 P1.4

SU00799

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Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

PIN DESCRIPTIONS

PIN NUMBER

MNEMONIC PLCC QFP DIP TYPE NAME AND FUNCTION

P0.0–0.7 43–36 37–30 39–32 I/O Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s written to

P1.0–P1.7 2–9 40–44,

P1.6 8 2 7 I/O Bidirectional I/O with internal pull-ups (OM5284), and open drain for (OM5234). P1.7 9 3 8 I/O Bidirectional I/O with internal pull-ups (OM5284), and open drain for (OM5234).

P2.0–P2.7 24–31 18–25 21–28 I/O Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that have

P3.0–P3.7 11,

RST 10 4 9 I Reset: A high on this pin for two machine cycles while the oscillator is running, resets the

ALE 33 27 30 I/O Address Latch Enable: Output pulse for latching the low byte of the address during an

PSEN 32 26 29 O Program Store Enable: Read strobe to external program memory via Port 0 and Port 2.

EA 35 29 31 I External Access: If during a RESET, EA is held at TTL, level HIGH, the CPU executes

XTAL1 21 15 19 I Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock

XTAL2 20 14 18 O Crystal 2: Output from the inverting oscillator amplifier.

NOTE:

To avoid “latch-up” effect at power-on, the voltage on any pin at any time must not be higher than V

22 6, 16,

28, 39

20 I Ground: 0V reference. With the QFP package, all VSS pins (V

connected.

SS1

to V

) must be

SS4

44 38 40 I Power Supply: This is the power supply voltage for normal, idle, and power-down

operation.

them float and can be used as high-impedance inputs. Port 0 is also the multiplexed low-order address and data bus during accesses to external program and data memory. In this application, it uses strong internal pull-ups when emitting 1s.

1–8 I/O Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups, except P1.6 and P1.7,

1–3

which are open drain for OM5234 (only). Port 1 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port 1 pins that are externally pulled low will source current because of the internal pull-ups. (See DC Electrical Characteristics: I

). Alternate functions include:

1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port 2 pins that are externally being pulled low will source current because of the internal pull-ups. (See DC Electrical Characteristics: I address byte during fetches from external program memory and during accesses to

). Port 2 emits the high-order

external data memory that use 16-bit addresses (MOVX @DPTR). In this application, it uses strong internal pull-ups when emitting 1s. During accesses to external data memory that use 8-bit addresses (MOV @Ri), port 2 emits the contents of the P2 special function register.

10–17 I/O Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have

13–195,7–13

1s written to them are pulled high by the internal pull-ups and can be used as inputs. As inputs, port 3 pins that are externally being pulled low will source current because of the pull-ups. (See DC Electrical Characteristics: I the 80C51 family , as listed below:

). Port 3 also serves the special features of

11 5 10 I RxD (P3.0): Serial input port 13 7 11 O TxD (P3.1): Serial output port 14 8 12 I INT0 (P3.2): External interrupt 15 9 13 I INT1 (P3.3): External interrupt 16 10 14 I T0 (P3.4): Timer 0 external input 17 11 15 I T1 (P3.5): Timer 1 external input 18 12 16 O WR (P3.6): External data memory write strobe 19 13 17 O RD (P3.7): External data memory read strobe

device. An internal diffused resistor to V external capacitor to V

permits a power-on reset using only an

access to external memory. In normal operation, ALE is emitted at a constant rate of 1/6 the oscillator frequency . Note that one ALE pulse is skipped during each access to external data memory.

It is activated twice each machine cycle during fetches from the external program memory. When executing out of external program memory, two activations of PSEN skipped during each access to external data memory. PSEN HIGH) during fetches from external program memory. PSEN

is not activated (remains can sink/source 8 LSTTL

inputs and can drive CMOS inputs without external pull-ups.

out of the internal program memory ROM provided the Program Counter is less than

16384. If during a RESET, EA program memory. EA

is held at TTL LOW level, the CPU executes out of external

is not allowed to float.

generator circuits.

+ 0.5V or VSS – 0.5V, respectively.

are

1996 Nov 01

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Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

DC ELECTRICAL CHARACTERISTICS

VSS = 0V, VDD = 5V ± 10%, T

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

IL1

IL2

IH1

OL1

OL2

Input low voltage, except EA, P1.6, P1.7 –0.5 0.2VDD–0.1 V Input low voltage to EA –0.5 0.2VDD–0.3 V Input low voltage to P1.6, P1.7 –0.5 0.3V Input high voltage, except XTAL1, RST, P1.6, P1.7 0.2VDD+0.9 VDD+0.5 V Input high voltage, XTAL1, RST 0.7V Output low voltage, ports 1, 2, 3, except P1.6, P1.7 IOL = 1.6mA Output low voltage, port 0, ALE, PSEN IOL = 3.2mA Output low voltage, P1.6, P1.7 IOL = 3.0mA 0.4 V Output high voltage, ports 1, 2, 3, ALE, PSEN Logical 0 input current, ports 1, 2, 3, except P1.6, P1.7 VIN = 0.45V –50 µA Logical 1-to-0 transition current, ports 1, 2, 3, except P1.6, P1.7 See note 5 –650 µA Input leakage current, port 0, EA, P1.6, P1.7 0.45V < V Power supply current:

Active mode @ 16MHz Idle mode @ 16MHz Power down mode

RST

Internal reset pull-down resistor 40 225 kΩ Pin capacitance 15 pF

NOTES:

1. The operating supply current is measured with all output pins disconnected; XTAL1 driven with t = VSS + 0.5V; VIH = V

2. The idle mode supply current is measured with all output pins disconnected; XTAL1 driven with t

3. The power-down current is measured with all output pins disconnected; XTAL2 not connected; Port 0 = P1.6 = P1.7 = V

4. 2V ≤ V

5. Pins of ports 1 , 2, and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its

= V

–0.5V; XTAL2 not connected; Port 0 = P1.6 = P1.7 = VDD; EA = RST = VSS.

= RST = VSS.

≤ VDDmax.

maximum value when V

6. Capacitive loading on ports 0 and 2 may cause spurious noise to be superimposed on the V

to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operations. In the worst cases (capacitive loading > 100pF), the noise pulse on the ALE pin may exceed 0.8V . In such cases, it may be desirable to qualify ALE with a Schmitt Trigger, or use an address latch with a Schmitt Trigger STROBE input.

7. Under steady state (non-transient) conditions, I = 26mA total for Port 0; Maximum IOL = 15mA total for Ports 1, 2, and 3; Maximum IOL = 71mA total for all output pins. If IOL exceeds the

test conditions, V

8. Capacitive loading on ports 0 and 2 may cause the V

may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions.

address bits are stabilizing.

9. I

for other frequencies can be derived from Figure 1, where FREQ is the external oscillator frequency in MHz. I

DDMAX

= 0°C to +70°C

amb

TEST LIMITS

1, 9

2, 9

3, 4

–0.5V; XTAL2 not connected; EA = RST = Port 0 = P1.6 = P1.7 = VDD.

is approximately 2V .

must be externally limited as follows: Maximum IOL = 10mA per port pin; Maximum

on ALE and PSEN to momentarily fall below the 0.9VDD specification when the

IOH = –25µA 0.75V

VDD=5.5V 32.0 mA

6, 7 6, 7

< 4.7V ±10 µA

VDD+0.5 V

0.45 V

6 mA

50 µA

= tf = 5ns;

= tf = 5ns; VIL = VSS + 0.5V;

;

s of ALE and ports 1 and 3. The noise is due

is given in mA.

DDMAX

1996 Nov 01

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Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

(mA)

(1)

(2)

0481216

(1) MAXIMUM OPERATING MODE: V (2) MAXIMUM IDLE MODE: VDD = V These values are valid within the specified frequency range.

= V

DDmax

XTAL1

(MHz)

Figure 1. IDD vs. Frequency

(mA)

(1) MAXIMUM OPERATING MODE: V (2) MAXIMUM IDLE MODE: VDD = V These values are valid within the specified frequency range.

81216

(1)

(2)

= V

DDmax

XTAL1

(MHz)

SU00801

AC ELECTRICAL CHARACTERISTICS

1, 2

16MHz CLOCK VARIABLE CLOCK

SYMBOL FIGURE PARAMETER MIN MAX MIN MAX UNIT

External Clock

CHCX

CLCX

CLCH

CHCL

2 High time 2 Low time 2 Rise time 2 Fall time

20 20 t 20 20 t

20 20 ns 20 20 ns

CLCL –

LOW HIGH

NOTES:

1. Parameters are valid over operating temperature range unless otherwise specified.

2. Load capacitance for port 0, ALE, and PSEN

= 100pF, load capacitance for all other outputs = 80pF.

3. These values are characterized but not 100% production tested.

VCC–0.5

0.45V

NOTE: AC inputs during testing are driven at VCC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’. Timing measurements are made at VIH min for a logic ‘1’ and VIL max for a logic ‘0’.

0.2V

CC CC

+0.9

–0.1

Figure 2. AC Testing Input/Output

ns ns

SU00010

1996 Nov 01

Page 7

Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

PLCC44: plastic leaded chip carrier; 44 leads SOT187-2

1996 Nov 01

Page 8

Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

DIP40: plastic dual in-line package; 40 leads (600 mil) SOT129-1

1996 Nov 01

Page 9

Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

QFP44: plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 x 10 x 1.75 mm SOT307-2

1996 Nov 01

Page 10

Philips Semiconductors Preliminary specification

OM5234/OM5284CMOS single-chip 8-bit microcontrollers

DEFINITIONS

Data Sheet Identification Product Status Definition

Objective Specification

Preliminary Specification

Product Specification

Formative or in Design

Preproduction Product

Full Production

Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.

LIFE SUPPORT APPLICA TIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected

to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.

Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381

This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.

Philips Semiconductors and Philips Electronics North America Corporation

 Copyright Philips Electronics North America Corporation 1996

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1996 Nov 01