1 OVERVIEW
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Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
- Color look-up table RAM for LCDC (256
×
16 bits)
16 bits = (R: 5 bits, G: 6 bits, B: 5 bits)
- The DMA control table can be located in the IVRAM or an external RAM when this RAM is used for
LCDC color look-up table.
• BBRAM (Battery backup RAM)
- 16 bytes
- The RAM contents can be maintained while the system power is off using the separated power supply for
RTC.
Input clock
• High-speed clock (OSC3)
- Maximum input clock frequency: 48 MHz
- Internal oscillator circuit (crystal or ceramic resonator) or external clock input
• Low-speed clock (OSC1)
- 32.768 kHz (typ.) clock for RTC and low-power operations
- Internal oscillator circuit (crystal resonator) or external clock input
Cache Controller (CCU)
• 1K-byte instruction cache and 1K-byte data cache with a four-way associative frame structure
(four frames/way, four lines/frame, four words/line)
• LRU replacement algorithm
• Automatic lock function during debug mode and the interrupt process of specified priority
• The instruction cache RAM and data cache RAM can be used as a general-purpose RAM when the cache
function is disabled.
DMA Controller (DMAC)
• Eight channels of table DMA
• Supports table reloading and low-priority channel pausing functions.
• Trigger sources
- USI (SPI/UART)
- USIL (SPI/UART/Built-in RAM LCD interface)
- FSIO (Asynchronous/Synchronous)
- I
2
S
- 16-bit audio PWM timer (T16P)
- A/D converter (ADC10)
- I/O ports (GPIO)
- USB function controller (USB)
- 16-bit PWM timer (T16A5)
- Software
Graphics Engine (GE)
• Drawing objects
- Shapes with a line width specified: straight lines (vertical, horizontal, and sloped lines), rectangle frames,
and circle rings
- Solid Shapes: points, triangles, rectangles, quadrilaterals, circles
- Texts with a font specified
- Compressed image (original run-length encoding)
• Image data block transfer
- Rectangle area copy within VRAM
- Data copy between VRAM and other memory
• Drawing effects
- Clipping draw
- Line width setting
- Drawing color setting with transparency feature
- Fill/Mesh/Rewrite/XOR