1 OVERVIEW
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
1-3
- Color conversion with palette/color depth conversion
- Resize/repeat/rotation (texts/compressed image)
• Word boundary commands (variable length) are provided for drawing control and commands list.
SRAM Controller (SRAMC)
• Allows direct connection of SRAM, ROM, and Flash memories.
• 26-bit address bus and 8/16-bit selectable data bus
• Up to six chip enable signals are available to connect external devices.
• Up to 64M-byte (A[25:0]) address space can be accessible with each chip enable signal.
• Programmable bus access wait cycle (0 to 15 cycles)
• Supports little endian access.
• Memory mapped I/O
• Supports both A0 and BS (Bus Strobe) type devices.
• Supports external wait request via the #WAIT pin.
SDRAM Controller (SDRAMC)
• Supports SDRAM direct interface. (Max. 72 MHz SDRAM clock)
• Supports only SDRAM devices with 16-bit data bus.
- Minimum configuration: 16M bits (2MB), 16-bit SDRAM
×
1
- Maximum configuration: 512M bits (64MB), 16-bit SDRAM
×
1
• CAS latency: one, two, or three programmable
• Supports burst and single read/write operations.
• Equipped with a four-stage
×
16-bit DQB (Data Queue Buffer).
• Supports up to four SDRAM banks and bank active mode.
• Built-in 12-bit auto-refresh counter
• Intelligent self-refresh function for low power operation
• Arbitrates ownership of the external bus between the CPU, DMAC, LCDC, and GE.
Clock Management Unit/Oscillators/PLL (CMU)
• Selects the system clock source (OSC3, PLL, OSC1).
• Turns the OSC3 and OSC1 oscillator circuits on and off.
• Controls frequency multiplication rate of the PLL (
×
1 to
×
16).
• Controls clocks according to the standby mode (SLEEP and HALT).
• Controls the external clock.
• Controls clock supply to the core and peripheral modules.
• OSC3 oscillator circuit
- Crystal oscillation: 5 MHz min. to 48 MHz max.
- Ceramic oscillation: 5 MHz min. to 48 MHz max.
- External clock input: 5 MHz min. to 48 MHz max.
*
A 48 MHz clock source with 0.25% of accuracy should be connected for using the USB function.
*
Before using a ceramic resonator, please be sure to contact Murata Manufacturing Co., Ltd. for further
information on conditions of use for ceramic resonators.
• PLL
- PLL input frequency: 5 MHz min. to 48 MHz max. (OSC3
×
1,
×
1/2,
×
1/3, ...
×
1/9,
×
1/10)
- PLL output frequency: 20 MHz min. to 72 MHz max.
- Multiplication rate:
×
1,
×
2,
×
3, ...
×
15,
×
16
• OSC1 oscillator circuit
- Crystal oscillation: 32.768 kHz typ.
- External clock input: 32.768 kHz typ.
Interrupt Controller (ITC)
• Five non-maskable interrupts
• 31 maskable interrupts (including four software interrupts)