LC87F0A08A

No.A1535-2/24

Minimum Bus Cycle Time

125ns (8MHz at VDD=2.5V to 5.5V)

250ns (4MHz at VDD=2.5V to 5.5V)

Note: The bus cycle time here refers to the ROM read speed.

Minimum Instruction Cycle Time (tCYC)

375ns (8MHz VDD=2.5V to 5.5V)

 750ns (4MHz VDD=2.5V to 5.5V)

Ports

 Normal withstand voltage I/O ports

whose I/O direction specifiable in 1-bit units:

28 (P0n, P1n, P2n, P30 to P32, P70)

Oscillation/input dedicated ports:

2 (CF1/XT1, CF2/XT2)

External reset pins:

1 (RES)

Power supply pins:

4 (VSS1, AVSS, VDD1, VDD2)

Reference voltage outputs:

1 (VREF)

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 supports 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 outputs also possible from lower-order 8 bits)

Mode 3: 16-bit timer with an 8-bit prescaler (with toggle outputs)

(lower-order 8 bits may be used as PWM outputs)

Timer A: 16-bit timer

Mode 0: 8-bit timer with an 8-bit programmable prescaler

 2 channels

Mode 1: 16-bit timer with an 8-bit programmable prescaler

Base timer

1) The input clock is selectable from the subclock (32.768kHz crystal oscillation), low-speed RC oscillator clock,

system clock, and timer 0 prescaler output.

(Release of the X'tal HOLD mode is enabled when the subclock or low-speed RC oscillator clock is selected.)

2) Provided with an 8-bit programmable prescaler.

3) Interrupts programmable in 5 different time schemes.

SIO

SIO1: 8-bit asynchronous/synchronous serial interface

Mode 0: Synchronous 8-bit serial I/O (2- or 3-wire configuration, 2 to 512 tCYC transfer clocks)

Mode 1: Asynchronous serial I/O (half-duplex, 8 data bits, 1 stop bit, 8 to 2048 tCYC baudrates)

Mode 2: Bus mode 1 (start bit, 8 data bits, 2 to 512 tCYC transfer clocks)

Mode 3: Bus mode 2 (start detect, 8 data bits, stop detect)

AD Converter

AD converter input port with a 20 operational amplifier (1 channel)

AD converter input ports (8 channels)

12/8 bits AD converter resolution selectable

Constant Voltage Detection Interrupt (CVD) Function

1) Detects VDD voltage fluctuations and generates an interrupt request.

2) The CVD detection level can be selected from 12 levels (2.6V, 2.8V, 3.0V, 3.2V, 3.4V, 3.6V, 3.8V, 4.0V, 4.2V,

4.4V, 4.6V, and 4.8V) through a register.