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UPD75237GJ Datasheet(PDF) 2 Page - NEC |
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UPD75237GJ Datasheet(HTML) 2 Page - NEC |
2 / 191 page 2 µPD75237 Item Built-in memory capacity I/O line except FIP dedicated pins Instruction cycle Fluorescent display tube (FIP) controller/driver Timer/counter Interrupt Mask option Operating temperature range Operating voltage Package LIST OF µPD75237 FUNCTIONS ( ) Function ROM: 24448 × 8 bits, RAM: 1024 × 4bits q q Input pin : 16 64 lines q q Input/output pin : 24 q q Output pin : 24 q q 0.67 µs/1.33 µs/2.67 µs/10.7 µs(when operated at 6.0 MHz) q q 0.95 µs/1.91 µs/3.82 µs/15.3 µs(when operated at 4.19 MHz) q q 122 µs (when operated at 32.768 kHz) q q Number of segments : 9 to 24 q q Number of digits : 9 to 16 q q Dimmer function : 8 levels q q Pull-down resistor mask option q q Key scan interrupt generation enabled q q Basic interval timer : Watchdog timer applicable q q Timer/event counter 5 channels q q Watch timer : Buzzer output enabled q q Timer/pulse generator : 14-bit PWM output enabled q q Event counter q q SBI/3-wire type q q 3-wire type q q Multi-interrupt enabled by hardware q q Both-edge detection q q External interrupt: 3 interrupts q q Detected edge programmable (with noise remove function) q q Detected edge programmable q q External test input: 1 input q q Rising edge detection q q Timer/pulse generator q q Timer/event counter q q Internal interrupt: 5 interrupts q q Basic interval timer q q Serial interface #0 q q Key scan interrupt q q Internal test input: 2 inputs q q Clock timer q q Serial interface #1 q q Main system clock : 6.0 MHz, 4.19 MHz q q Subsystem clock : 32.768 kHz standard q q High withstand voltage port : Pull-down resistor or open-drain output q q Ports 4 and 5 : Pull-up resistors q q Port 7 : Pull-down resistor –40 to +85 °C 2.7 to 6.0 V (standby data hold: 2.0 to 6.0 V) 94-pin plastic QFP (20 × 20 mm) System clock oscillator 2 channels Serial interface |
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