Philips pca84c12 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

PCA84C122; 222; 422; 622; 822

8-bit microcontrollers for remote control transmitters

Product speciﬁcation Supersedes data of February 1994 File under Integrated Circuits, IC14

Philips Semiconductors

1995 May 01

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers for remote control transmitters

CONTENTS

1 FEATURES 2 GENERAL DESCRIPTION

2.1 Important note 3 MEMORY AND I/O CONFIGURATIONS 4 ORDERING INFORMATION 5 BLOCK DIAGRAM 6 PINNING INFORMATION

6.1 Pinning

6.2 Pin description 7 POWER-ON-RESET STATUS AND PORT

OPTIONS

8 HARDWARE MODULATOR

8.1 Interface between the 84CXXX core and derivative logic

8.2 Instructions for data transfer between the 84CXXX core and derivative logic

8.3 Operation of the Hardware Modulator

9 INTERRUPTS

9.1 Internal timer/counter

9.2 External keypad wake-up and T0/INT pin

10 OUTPUT DRIVER 11 WATCHDOG TIMER (WDT) 12 LIMITING VALUES 13 DC CHARACTERISTICS 14 AC CHARACTERISTICS 15 APPLICATION INFORMATION 16 PACKAGE OUTLINES 17 SOLDERING

17.1 Plastic small outline packages

17.2 Plastic dual in-line packages

18 DEFINITIONS 19 LIFE SUPPORT APPLICATIONS

PCA84C122; 222; 422; 622; 822

1995 May 01 2

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers for remote control transmitters

1 FEATURES

• 84CXXX CPU

• ROM, RAM and I/O configurations are device

dependent; see Chapter 3

• Two test inputs: T0 (ANDed with Port 1 input lines)

and T1

• 3 single-level vectored interrupt sources:

– external (T0/INT and Port 1, for keypad press

wake-up function) – timer/counter (TI) – hardware modulator interrupt

• 8-bit programmable timer/counter with 5-bit pre-scaler

• Power saving: Idle and Stop modes are provided

• Hardware Modulator providing pulse bursts, with:

– programmable duty factor for each pulse – programmable number of pulses

• One output line from the Hardware Modulator to control the driver transistor for the infrared LED (IR-LED). Capable of sinking 27 mA at V

• Watchdog Timer to keep the transmitter from being locked or malfunction

• Available packages: SO and DIP types (SO20, SO24, SO28, SDIP24 and DIP20); see Chapter 4

• On-chip oscillator: 455 kHz to 6 MHz

• Single supply voltage: 2.0 V to 5.5 V

• Operating temperature: −20 to +50 °C.

2 GENERAL DESCRIPTION

The PCA84C122 is a stand-alone microcontroller designed for use in remote control transmitters for a wide range of applications.

The PCA84C122 provides a number of dedicated hardware functions for remote controller applications. These functions include the following additional blocks to the 84CXXX core:

• Interrupt Gate

• Hardware Modulator

• Output Driver

• Watchdog Timer.

= 2.0 V, V

OUT

= 1.0 V

PCA84C122; 222; 422; 622; 822

Although the PCA84C122 is specifically referred to throughout this data sheet, the information applies to all the devices. The differences between the PCA84C122 and the other devices are specified in Chapter 3.

Figure 2 shows the general block diagram of the device. The 84CXXX core plus 8 kbytes ROM and 64 bytes RAM has the same function as described in the PCF84CXXX family description (see

When the transmitter is not in use the microcontroller is in Stop mode and the oscillator is halted. The AND gate connected to the Port 1 (P10 to P17) lines provides the wake-up to end the Stop mode.

The Hardware Modulator produces pulse bursts according to the required protocol. The ON-time and OFF-time of each pulse (i.e. duty factor) and the number of pulses are controlled by software.

The Watchdog Timer (WDT) will reset the PCA84C122 when it has not been reloaded (reset) in time, because the program has run out of sequence (endless loop, continuous Idle mode, etc.). During Stop mode the oscillator is halted, therefore the Watchdog Timer is not running.

Automatic system reset is generated by the WDT if the timer is not reset before overflow from counting within a certain period of time.

The Output Driver can handle sufficient current to drive a single transistor, that provides the required current for the IR-LED.

2.1 Important note

This data sheet details the specific properties of the PCA84C122; PCA84C222; PCA84C422; PCA84C622 and PCA84C822. The shared characteristics of the family of microcontrollers are described in the PCF84CXXXA Family single-chip 8-bit Microcontroller of

IC14”

, which should be read in conjunction with this data

sheet.

“Data Handbook IC14”

“Data Handbook

1995 May 01 3

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers for remote control transmitters

3 MEMORY AND I/O CONFIGURATIONS

DEVICE I/O LINES ROM RAM

PCA84C122A 16 PCA84C122B 12 PCA84C222A 16 PCA84C222B 12 PCA84C422A 16 PCA84C422B 12 PCA84C622A 16 PCA84C622B 12 PCA84C622C 20 PCA84C822A 16

PCA84C822C 20

Note

1. 4 I/O lines with 10 mA sink capability.

(1)

PCA84C122; 222; 422; 622; 822

8KPCA84C822B 12

32 bytes

64 bytes

4 ORDERING INFORMATION

TYPE NUMBER

(1)

PACKAGE

NAME DESCRIPTION VERSION

PCA84CX22AP SDIP24 plastic shrink dual in-line package; 24 leads (400 mil) SOT234-1 PCA84CX22AT SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 PCA84CX22BP DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1 PCA84CX22BT SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 PCA84C622CT PCA84C822CT

SO28

plastic small outline package; 28 leads; body width 7.5 mm; low stand-off height

SOT136-1

Note

1. ‘X’ in the type number denotes the numbers: 1, 2, 4, 6 and 8.

technology:

PC = CMOS

temperature range:

A = 20 to 50 C

84C122

package:

P = plastic DIL T = plastic mini-pack (SO)

generic type number

MLA973 - 1

1995 May 01 4

Fig.1 Numbering scheme.

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers for remote control transmitters

5 BLOCK DIAGRAM

XTAL

XTAL1

OSCILLATOR

XTAL2

HARDWARE

MODULATOR

PCA84C122; 222; 422; 622; 822

OUT

DRIVER

OUTPUT

MCD248 - 2

T0/INT

PCA84CXXX

RAM

64 bytes

ROM

8 kbytes

osc

f / 30

WDT

CORE

84CXXX

P20

RESET

T0/INT

P21

P22

P23

P17

P16

P15

P14

P13

P12

P11

P10

P07

P06

P05

P04

P03

P02

P01

P00

handbook, full pagewidth

Fig.2 Block diagram.

1995 May 01 5

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers for remote control transmitters

6 PINNING INFORMATION

6.1 Pinning

P14 P15

1 2

P01 P00

T0 / INT

RESET

5 6

84CX22AP

XTAL2 XTAL1

P04 P05 P16 P17

84CX22AT

7 8

9 10 11 12

MCD251 - 2

PCA84C122; 222; 422; 622; 822

P02

P03

22 21

OUT V

P10

P11

P12

P13

P07

P06

14 13

P22

P14

P01

P00

T0/INT

RESET

XTAL2 XTAL1

5 6

84C622CT

P04 P05 P16 P17 P20

84C822CT

9 10 11 12 13

MLA977 - 1

P23

P15

P02

P03

25 24

OUT V

P10

P11

P12

P13

P07

P06

17 16

P21

1514

Fig.3 Pin configurations PCA84CX22AP (SDIP24)

and PCA84CX22AT(SO24).

P01

P00

DD XTAL2 XTAL1

P04 P05

3 4 5

84CX22BT

6 7 8 9

MCD250 - 2

T0 / INT OUT

RESET

P02

P03

P10

P11 P12

P13

P07

P06

Fig.4 Pin configuration PCA84CX22CT (SO28).

P10

OUT

P03 P02 P01

P00

T0/INT

RESET

2 3 4 5

84CX22BP

6 7 8 9

MLA975 - 2

P11

P12 P13

18 17

P07 P06

P05

P04

XTAL1

XTAL2

Fig.5 Pin configuration PCA84CX22BT (SO20). Fig.6 Pin configuration PCA84CX22BP (DIP20).

1995 May 01 6

Philips Semiconductors Product speciﬁcation

8-bit microcontrollers for

PCA84C122; 222; 422; 622; 822

remote control transmitters

6.2 Pin description Table 1 Pin description for PCA84CX22AP, PCA84CX22AT, PCA84CX22BP, PCA84CX22BT and PCA84CX22CT

SYMBOL

P00 to P07 3, 2, 23, 22,

P10 to P17 19, 18, 17, 16,

P20 to P23 − 14, 15, 1, 28 −−standard I/O Port lines, generally

INT4538test T0 and external interrupt input

T0/ T15649test T1 input RESET 67510active HIGH reset;

SDIP24/SO24

(see Fig.3)

10, 11, 14, 15

1, 22, 12, 13

SO28

(see Fig.4)

4, 3, 26, 25, 11, 12, 17, 18

22, 21, 20,19, 2, 27, 13, 16

SO20

(see Fig.5)

2, 1, 20, 19, 9, 10, 11, 12

16, 15, 14, 13 1, 20,19, 18 standard I/O Port lines, generally

DIP20

(see Fig.6)

7, 6, 5, 4, 14, 15, 16, 17

standard I/O Port lines, generally used for keypad scanning

used for keypad sensing

used for visible LED’s

normally connected to VSS. For further information see PCF84CXXXA description in

“Data Handbook IC14”

XTAL1 9 10 8 13 crystal or ceramic resonator XTAL289712 OUT 21 24 18 3 pulse train output pin, capable of

sinking 27 mA

78611power supply 20 23 17 2 ground

DESCRIPTION

7 POWER-ON-RESET STATUS AND PORT OPTIONS

• All Port lines are standard I/O (option 1).

• RESET (Power-on-reset) level of 1.3 V.

After Power-on-reset, Port 0 is reset to LOW; Port 1, Port 2 and

1995 May 01 7

OUT are reset to HIGH.

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