S1C17801

2

EPSON

● Internal Memories

• Flash EEPROM

- 128K bytes

• RAM

- 4K bytes

• VRAM

- 2K bytes

- Usable as a general-purpose RAM with battery backup feature

● Operating Clock

• Main clock

- 48 MHz when the USB function is used

- 1 to 48 MHz (can be divided by 1 to 32) or 32.768 kHz when the USB function is not used

- On-chip oscillator (crystal or ceramic) or external clock input

• Sub clock

- 32.768 kHz (typ.) for the RTC

- On-chip oscillator (crystal)

● SRAM Controller

• Provides a 23-bit external address bus, an 8- or 16-bit width selectable data bus, and four chip enable signals to

support a maximum of 15M-byte external memory space.

• Provides an SRAM UMA feature to access an external VRAM for supporting up to 16-grayscale QVGA LCD panel.

● Interrupt Controller

• Four non-maskable interrupts

- Reset (#RESET pin or watchdog timer)

- Address misaligned

- Debug

- NMI (#NMI pin or watchdog timer)

• 28 maskable interrupts

- Port inputs (eight systems)

- PWM control capture timer/counter (one system)

- A/D converter (two systems)

- 16-bit timer of clock generator (one system)

- 8-bit timers of clock generator (two systems)

- UART (one system)

- SPI (one system)

- I

- RTC (one system)

- 8-bit timers (four systems)

- LCD controller (one system)

- Extended SPI (one system)

- USB function controller (one system)

- I

- Remote controller (one system)

- The interrupt level (priority) of each maskable interrupt system is configurable (levels 0 to 7).

● Prescaler

• Generates the source clocks for the clock generator.

● PWM Control Capture Timer/Counter

• One channel of 16-bit timer/counter with PWM output function is available.

• Can generate two compare-match interrupts.

• Supports the IGBT output control function using the A/D converter out-of-range signal.