LC87F1JJ8A

No.A1455-2/27

Bus Cycle Time

• 83.3ns (When CF=12MHz)

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

Minimum Instruction Cycle Time (tCYC)

• 250ns (When CF=12MHz)

Ports

• I/O ports

Ports whose I/O direction can be designated in 1-bit units 28 (P10 to P17, P20 to P27, P30 to P34,

P70 to P73, PWM0, PWM1, XT2)

Ports whose I/O direction can be designated in 4-bit units

8 (P00 to P07)

• USB ports

2 (UHD+, UHD-)

• Dedicated oscillator ports

2 (CF1, CF2)

• Input-only port (also used for oscillation)

1 (XT1)

• Reset pin

1 (RES)

• Power supply pins

6 (VSS1 to VSS3, VDD1 to VDD3)

Timers

• Timer 0: 16-bit timer/counter with 2 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 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 4: 8-bit timer with a 6-bit prescaler

• Timer 5: 8-bit timer with a 6-bit prescaler

• Timer 6: 8-bit timer with a 6-bit prescaler (with toggle outputs)

• Timer 7: 8-bit timer with a 6-bit prescaler (with toggle outputs)

• Base timer

1) The clock is selectable from the subclock (32.768kHz crystal oscillation), system clock, and timer 0 prescaler

output.

2) Interrupts programmable in 5 different time schemes

SIO

• SIO0: Synchronous serial interface

1) LSB first/MSB first mode selectable

2) Transfer clock cycle: 4/3 to 512/3 tCYC

3) Automatic continuous data transmission (1 to 256 bits, specifiable in 1-bit units)

(Suspension and resumption of data transmission possible in 1 byte units)

• 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)

• SIO4: Synchronous serial interface

1) LSB first/MSB first mode selectable

2) Transfer clock cycle: 4/3 to 1020/3 tCYC

3) Automatic continuous data transmission (1 to 8192 bytes, specifiable in 1 byte units)

(Suspension and resumption of data transmission possible in 1 byte units or in word units)

4) Auto-start-on-falling-edge function

5) Clock polarity selectable

6) CRC16 calculator circuit built in