LC87F2708A Datasheet, PDF (2/21 Pages) Sanyo Semicon Device – CMOS IC FROM 8K byte, RAM 512 byte on-chip 8-bit 1-chip Microcontroller

LC87F2708A
„Minimum Bus Cycle Time ^Note1
• 100ns (10MHz)
VDD=2.7 to 5.5V ^Note2
„Minimum Instruction Cycle Time
• 300ns (10MHz)
VDD=2.7 to 5.5V ^Note2
Note1: The bus cycle time here refers to the ROM read speed.
Note2: Use this product in a voltage range of 3.0 to 5.5V because the minimum release voltage (PORRL) of the
power-on reset (POR) circuit is 2.87V±0.12V.
„Ports
• I/O ports
Ports whose I/O direction can be designated in 1-bit units 11 (P10 to P16, P30 to P33)
• Reset pins
1 (RES)
• Power pins
2 (VSS1, VDD1)
„Timers
• Timer 0: 16-bit timer/counter with a capture register.
Mode 0: 8-bit timer with an 8-bit programmable prescaler (with an 8-bit capture register) × 2 channels
Mode 1: 8-bit timer with an 8-bit programmable prescaler (with an 8-bit capture register)
+ 8-bit counter (with an 8-bit capture register)
Mode 2: 16-bit timer with an 8-bit programmable prescaler (with a 16-bit capture register)
Mode 3: 16-bit counter (with a 16-bit capture register)
• Timer 1: 16-bit timer/counter that can provide with PWM/toggle outputs
Mode 0: 8-bit timer with an 8-bit prescaler (with toggle outputs) + 8-bit timer/
counter with an 8-bit prescaler (with toggle outputs)
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 outputs)
(toggle output also possible from the lower-order 8 bits)
Mode 3: 16-bit timer with an 8-bit prescaler (with toggle outputs)
„Serial Interface
(Lower-order 8 bits may be used as PWM)
• SIO7: 8-bit synchronous serial interface
1) LSB first/MSB first mode selectable
2) Built-in 8-bit baudrate generator (maximum transfer clock cycle=4/3 tCYC)
„High-Speed 12-bit PWM
• System clock/high-speed RC oscillation clock (20MHz or 40MHz) operation selectable
• Duty/period programmable
• Continuous PWM output/specific count PWM output (automatic stop) selectable
„ High-speed Pulse/Period Counter
• HCT1: High-speed RC pulse width/period counter 1
1) System clock/high-speed RC oscillation clock (20MHz or 40MHz) operation selectable
2) H-level width/L-level width/period measurement modes selectable
3) Input triggering noise filter
• HCT2: High-speed pulse width/period counter 2
1) System clock/high-speed RC oscillation clock (20MHz or 40MHz) operation selectable
2) Can measure both L-level width and period simultaneously.
3) Input triggering noise filter
4) Input trigger selectable (from 3 signals, i.e., P11/HCT2IN, P31/HCT2IN, and analog comparator output)
„AD Converter: 12 bits × 7 channels
• 12-/8-bits AD converter resolution selectable
„Analog Comparator
• Sends output to the P32/CMPO port (polarity selectable).
• Edge detection function (shared with INTC and also allows the selection of the noise filter function)
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