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PCA84C923D Datasheet(PDF) 3 Page - NXP Semiconductors |
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PCA84C923D Datasheet(HTML) 3 Page - NXP Semiconductors |
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3 / 36 page  1997 Oct 22 3 Philips Semiconductors Product specification Microcontrollers for universal infrared remote transmitter applications PCA84C922; PCA84C923 1 FEATURES • 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 MHz • Single supply voltage: 2.0 to 5.5 V • Operating temperature: −20 to +70 °C • Available packages: SO24, SO28, VSO56 and SDIP24. 2 GENERAL DESCRIPTION The PCA84C922A, PCA84C922C, PCA84C923A, PCA84C923C and PCA84C923D are members of the PCF84CXXXA CMOS family of microcontrollers and have been designed for use in universal infrared remote commander applications. The term PCA84C92X is used throughout this data sheet to refer to all devices in the range, differences between devices are shown in Table 1 and also highlighted in the text. In addition to the common functions of the PCF84CXXXA family of microcontrollers the PCA84C92X also provides: • a Hardware Modulator that generates programmable pulse trains for driving an infrared LED • an on-chip Coding Table specifically for the storage of code data • a modified interrupt architecture that will wake-up the CPU from the Idle or Stop modes when any key is pressed • a Watchdog Timer to prevent CPU lock-up. The PCA84C923D has been designed as the emulation chip for both the PCA84C92X and the PCA84CX22 range of microcontrollers (both ranges being pin compatible). Table 1 The PCA84C92X range of microcontrollers 3 ORDERING INFORMATION FUNCTION PCA84C923D PCA84C923C PCA84C923A PCA84C922C PCA84C922A System ROM 8 kbytes 8 kbytes 8 kbytes 8 kbytes 8 kbytes System RAM 256 bytes 256 bytes 256 bytes 128 bytes 128 bytes Coding Table ROM 16 kbytes 16 kbytes 16 kbytes 8 kbytes 8 kbytes Coding Table extension up to 64 kbytes no no no no Maximum number of keys 189 117 81 117 81 I/O 36 20 16 20 16 Emulation device PCA84C923D PCA84C923D PCA84C923D PCA84C923D PCA84C923D Package VSO56 SO28 SO24 and SDIP24 SO28 SO24 and SDIP24 TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION PCA84C922AP SDIP24 plastic shrink dual in-line package; 24 leads (400 mil) SOT234-1 PCA84C922AT SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 PCA84C922CT SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1 PCA84C923AP SDIP24 plastic shrink dual in-line package; 24 leads (400 mil) SOT234-1 PCA84C923AT SO24 plastic small outline package; 24 leads; body width 7.5 mm SOT137-1 PCA84C923CT SO28 plastic small outline package; 28 leads; body width 7.5 mm SOT136-1 PCA84C923DT VSO56 plastic very small outline package; 56 leads SOT190-1 |
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