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UPD784915A Datasheet(PDF) 3 Page - NEC |
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UPD784915A Datasheet(HTML) 3 Page - NEC |
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3 / 86 page  µPD784915A, 784916A 3 Function List (1/2) Item Internal ROM capacity Internal RAM capacity Operating clock Minimum instruction ex- ecution time I/O ports Real-time output port Timer/counter Capture register VCR special circuit General-purpose timer PWM output Serial interface A/D converter µPD784915A µPD784916A 48 Kbytes 64 Kbytes 1280 bytes 16 MHz (internal clock: 8 MHz) Low frequency oscillation mode: 8 MHz (internal clock: 8 MHz) Low power dissipation mode: 32.768 kHz (subsystem clock) 250 ns (with 8-MHz internal system clock) input : 8 54 I/O : 46 11 (including one each for pseudo VSYNC, head amplifier switch, and chrominance rotation) Timer/counter Compare register Capture register Remark TM0 (16 bits) 3 - TM1 (16 bits) 3 1 FRC (22 bits) - 6 TM3 (16 bits) 2 1 UDC (5 bits) 1 - EC (8 bits) 4 - For HSW signal generation EDV (8 bits) 1 - For CFG signal division Input signal Number of bits Measurable cycle Operating edge CFG 22 125 ns to 524 ms ↑↓ DFG 22 125 ns to 524 ms ↑ HSW 16 1 µs to 65.5 ms ↑↓ VSYNC 22 125 ns to 524 ms ↑ CTL 16 1 µs to 65.5 ms ↑↓ TREEL 22 125 ns to 524 ms ↑↓ SREEL 22 125 ns to 524 ms ↑↓ • VSYNC separation circuit, HSYNC separation circuit • VISS detection, wide aspect detection circuits • Field identification circuit • Head amplifier switch/chroma rotation output circuit Timer Compare register Capture register TM2 (16 bits) 1 - TM4 (16 bits) 1 (capture/compare) 1 TM5 (16 bits) 1 - • 16-bit accuracy : 3 channels (carrier frequency: 62.5 kHz) • 8-bit accuracy : 3 channels (carrier frequency: 62.5 kHz) 3-wire serial I/O: 2 channels • BUSY/STRB control (1 channel only) 8-bit resolution x 12 channels, conversion time: 10 µs Super timer unit |
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Similar Description - UPD784915A |
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