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P83C880 Datasheet(PDF) 3 Page - NXP Semiconductors |
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P83C880 Datasheet(HTML) 3 Page - NXP Semiconductors |
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3 / 84 page  1997 Dec 12 3 Philips Semiconductors Product specification Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc. P83Cx80; P87C380 1 FEATURES • 80C51 type core • On-chip oscillator with a maximum frequency of 16 MHz (maximum 0.75 µs instruction cycle) • A DDC interface: – That fully supports DDC1 with specific hardware – That is DDC2B, DDC2B+, DDC2AB (ACCESS.bus) compliant, based on a dedicated hardware I2C-bus interface. – Contains a specific AUX-RAM buffer with programmable size (128 or 256 bytes) that can be used for DDC operation and shared as system RAM • Automatic mode detection by hardware to capture the following information: – HSYNC frequency with 12-bit resolution – VSYNC frequency with 12-bit resolution – HSYNC and VSYNC polarity – HSYNC and VSYNC presence; needed for the VESA Device Power Management Signalling (DPMS) standard • On-chip sync processor comprising: – Composite sync separation – Free running mode – Clamping – Pattern generation • Two specific ports for the software I2C-bus interface • 4 analog voltage outputs derived from an 8-bit Digital-to-Analog Converter (DAC) • Ten 8-bit Pulse Width Modulation (PWM) outputs for digital control application • One 14-bit PWM output for digital control application • One 4-bit Analog-to-Digital Converter (ADC) with 2 input channels (for keyboard interface) • LED driver port (Port 0); eight port lines with 10 mA drive capability • One 8-bit port only for I/O function • 20 derivative I/O ports with the specific port type configuration in each alternative function • Watchdog Timer with a programmable interval • On-chip Power-on-reset for low power detection • Special Idle and Power-down modes for reduced power operation • Optimized for Electromagnetic Compatibility (EMC) • Operating temperature: −25 to +85 °C • Single power supply: 4.4 to 5.5 V. 1.1 Differences from the 80C51 core • No external memory connection; signals EA, ALE and PSEN are not present. • Port 1, Port 2 and Port 3 (P3.0 to P3.3 only) mixed with other derivative functions. • Timer 0/Counter 0 and Timer 1/Counter 1: external input is removed. • External interrupt 0/INT0 replaced by Mode detection function. • Standard serial interface (UART) and its control register are removed. • Wake-up from Power-down mode is also possible by means of an interrupt. 1.2 Memory Table 1 ROM/RAM sizes DEVICE MEMORY ROM RAM P83C880 8 kbytes 512 bytes P83C180 16 kbytes 512 bytes P83C280 24 kbytes 512 bytes P83C380 32 kbytes 512 bytes P87C380 (OTP) 16 kbytes 512 bytes |
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