Table of Contents
Advertisement
High-speed/high-performance bus interface
Can select either separate address/data buses or multiplex address/data bus
• Address: 24 bits/Data: 8/16 bits
External memory space can be partitioned into four blocks
• Chip select signal output for each block
• Blocks 2 to 3 can be switched between fixed wait insertion or handshaking
• Blocks 0 to 3 can be switched between synchronous mode and asynchronous mode
• Blocks 1 and 2 can be used as DRAM space
DRAM control circuit on chip
• Address multiplexing function
• Programmable RAS/CAS timing setting
• Refresh control
- CAS-before-RAS refresh support
- Programmable refresh interval
• High-speed page mode support
One store buffer on chip
• Avoids time penalty when performing a store operation in an internal peripheral or an external
device
Input/output interface
Supports 3.3 V, CMOS-level input/output interface
Wide variety of internal peripheral functions
Interrupts
• 38 sources
-
External interrupts: 9 sources (IRQn (n=7 to 0) x 8, and NMIRQ x 1)
- Internal interrupts: 29 sources (timers: 18; Serial I/F: 8; WDT: 1; A/D: 1; system error: 1)
Timers
• Twelve 8-bit timers (all are down-counters)
- Format: Reload timer
- Cascaded connection possible (permits use as 16- to 32-bit timers)
- Timer output possible (duty ratio; 1:1,12 outputs)
- PWM output possible (8 outputs)
- Internal clock source or external clock source can be selected
- Serial interface clock generation
- A/D converter start timing generation
• One 16-bit timer (up-counter)
- Internal clock source or external clock source can be selected
- Input capture function (rising edge, falling edge, or both edges can be selected)
- PWM generation functions
- 2 compare and capture registers
• Three 16-bit timers (down-counter)
- Format: reload timer
- Internal clock source or external clock source can be selected
• One watchdog timer
Serial interface
• UART/synchronous system/I2C (multipurpose) x 1 channel
• UART-serial interface x 1 channel (maximum bit rate: 230.4 kbit/s)
• Synchronous x 2 channels
A/D converter
• 10 bits: 4 inputs
- Automatic scanning possible (0 to 3 channels can be set)
General Specifications
_____________
1-3
Advertisement
Table of Contents
