Ordering number : ENA0145 LC87F6AC8A CMOS LSI LC87F6AC8A Ports Normal withstand voltage I/O ports User Option Selection Ports Whose Input/Output Can Be Specified in 1-bit Units For LC876A00 series 32 (P1n, P70 to P73, P8n, P30 to P37, PAn) For LC876B00 series 32 (P1n, P70 to P73, P8n, P32 to P35, SI2Pn, PAn) Port that can also be used for oscillation 1 (XT2) 12V max. withstand voltage I/O ports Ports whose input/output can be specified in 4-bit units 8 (P0n) (in 1- bit units when configured for N-channel open drain output) Normal withstand voltage input-only port (also used for oscillation) 1 (XT1) Vacuum fluorescent display (VFD) driver ports Large current outputs for digits 9 (S0/T0 to S8/T8) Large current outputs for digits/segments 7 (S9/T9 to S15/T15) Outputs for digits/segments 8 (S16 to S23) Outputs for segments 24 (S24 to S47) Multiplexed pin function I/O ports 8 (PFn) Input ports 24 (PCn, PDn, PEn) Dedicated oscillator pins 2 (CF1, CF2) Reset pin 1 (RES) Power pins 6 (V 1 to V 2, V 1 to V 4) SS SS DD DD Dedicated vacuum fluorescent display driver power pin 1 (VP) VFD automatic display controller <1> Programmable segment/digit output patterns Waveform output can be switched between segment and digit output. (number of pins available for digit waveform output: 9 to 24) Capable of driving large current VFDs in parallel <2> Provides 16-step dimmer function Small signal detection (microphone signals, etc.) <1> Counts pulses with amplitudes greater than a preset level <2> 2-bit counter Timers Timer 0: 16-bit timer/counter with two capture registers Mode 0: 8-bit timer with an 8-bit programmable prescaler (with two 8-bit capture registers) 2 channels Mode 1: 8-bit timer with an 8-bit programmable prescaler (with two 8-bit capture registers) + 8-bit counter (with two 8-bit capture registers) Mode 2: 16-bit timer with an 8-bit programmable prescaler (with two 16-bit capture registers) Mode 3: 16-bit counter (with two 16-bit capture registers) Timer 1: 16-bit timer/counter with PWM/toggle output capability Mode 0: 8-bit timer with an 8-bit prescaler (with toggle output) + 8-bit timer/counter with an 8-bit prescaler (with toggle output) Mode 1: 8-bit PWM with an 8-bit prescaler 2 channels Mode 2: 16-bit timer/counter with an 8-bit prescaler (with toggle output) (toggle output also possible from the low-order 8 bits) Mode 3: 16-bit timer with an 8-bit prescaler (with toggle output) (The low-order 8 bits can be used as PWM.) No.A0145-2/34