PCA84C923 Datasheet | NXP Semiconductors

INTEGRATED CIRCUITS DATA SHEET PCA84C922; PCA84C923 Microcontrollers for universal infrared remote transmitter applications Product specification Supersedes data of 1995 Jun 30 File under Integrated Circuits, IC14 1997 Oct 22 Philips Semiconductors Product specification Microcontrollers for universal infrared remote transmitter applications CONTENTS 1 2 3 4 5 5.1 5.2 6 6.1 6.2 6.3 7 7.1 7.2 7.3 7.4 7.5 7.6 8 8.1 9 10 11 11.1 11.2 11.3 12 13 14 15 16 17 18 18.1 18.2 18.3 19 20 Features GENERAL DESCRIPTION ORDERING INFORMATION BLOCK DIAGRAMS PINNING INFORMATION Pinning Pin description GENERAL OPERATION DESCRIPTION System selection Key scanning Accessing mand code HARDWARE MODULATOR ON-time Register OFF-time Register Pulse Timer Pulse Counter Hardware Modulator Control Register (HMCTL) Operation of the Hardware Modulator CODING TABLE Accessing the Coding Table WATCHDOG TIMER (WDT) PORT OPTIONS INTERRUPTS External keypad wake-up and T0/INT pin interrupt Hardware Modulator interrupt Internal Timer/counter (T1) interrupt DERIVATIVE REGISTERS EMULATION LIMITING VALUES DC CHARACTERISTICS AC CHARACTERISTICS PACKAGE OUTLINES SOLDERING Introduction SDIP SO and VSO DEFINITIONS LIFE SUPPORT APPLICATIONS PCA84C922; PCA84C923 1997 Oct 22 Philips Semiconductors Product specification Microcontrollers for universal infrared remote transmitter applications 1 Features PCA84C922; PCA84C923 GENERAL DESCRIPTION - 84CXXX CPU - ROM, RAM, I/O and keypad configurations are device dependent; see Table 1 - Two test inputs: T0 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 prescaler - Power saving Idle and Stop modes - Low power operation: 2 V - Hardware Modulator - Watchdog timer - On-chip oscillator: 1 to 6...