Micronas SDA 6000, User Manual

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SDA 6000
PRELIMINARY DATA SHEET
Version 2.1
C16X Microcontroller
4 - 4 Micronas
4.1 Overview
M2’s microcontroller and its peripherals are based on a Cell-Based Core ( CBC ) which is
compatible to the well known C166 architecture.
In M2, the CPU and its peripherals are generally clocked with 33.33 MHz which results
in an instruction cycle time of 60 ns. The implementation of the microcontroller within M2
deviates from other known C16x derivates since the controller’s XBUS is not used as the
external bus. All external access cycles of the microcontroller, the display generator and
the acquisition unit are performed via a high performance time interlocking SDRAM bus.
The external bus interface (EBI) manages the arbitration procedure for access cycles to
the external synchronous DRAM in parallel to an external static memory (ROM or
FLASH; for more details refer to
Chapter 4.4 ).
Due to the realtime critical bus bandwidth requirements of the display generator,
unpredictable wait-states for the controller may occur. These wait-states do not destroy
the overall average system performance, because they are mostly buffered by the CPU
related instruction and data buffers. Nevertheless they can influence, for example, the
worst disconnection response time.
Emulation is now performed by an on-chip debug module which can be accessed by a
JTAG interface.
The following microcontroller peripherals are implemented:
• 2 KByte IRAM (System RAM)
• 2 KByte XRAM (XBUS located)
• 32 Interrupt Nodes
• General Purpose Timer Units (GPT1 and GPT2)
• Real Time Clock (RTC)
• Asynchronous/Synchronous Serial Interface (ASC0)
• High-Speed Synchronous Serial Interface (SSC)
• I
2
C Bus Interface (I
2
C)
• 4-Channel 8-bit A/D Converter (ADC)
• Watchdog Timer (WDT)
• On-Chip Debug Support Module (OCDS)
• 42 Multiple Purpose Ports
Central Processing Unit
The CPU executes the C166 instruction set (with the extensions of the C167 products).
Its main features are the following:
• 4-stage pipeline (Fetch, Decode, Execute and Write-Back).
• 16
⌠
16-bit General Purpose Registers
• 16-bit Arithmetic and Logic Unit
• Barrel shifter
• Bit processing capability