MC9S12XA256VAA数据手册恩XP中文资料规格书

描述 Description

The S12X MCU family retains the cost-effective, power consumption, electromagnetic compatibility and code-size efficiency advantages currently enjoyed by users of the existing 16-bit HCS12 MCU family.
Based on an enhanced HCS12 core, the S12X family gives you two to five times the performance of a 25 MHz HCS12 while retaining a high degree of pin and code compatibility with the HCS12.
The S12X family introduces the performance-boosting XGATE module. Using enhanced DMA functionality, this parallel processing module offloads the CPU by providing high-speed data processing and transfer between peripheral modules, RAM and I/O ports.

特性 Features

HCS12X Core
• 16-bit HCS12X CPU
• Upward compatible with HCS12 instruction set
• Interrupt stacking and programmer's model identical to HCS12
• Instruction queue
• Enhanced indexed addressing
• Enhanced instruction set
• EBI (external bus interface)
• MMC (module mapping control)
• INT (interrupt controller)
• DBG (debug module to monitor HCS12X CPU and XGATE bus activity)
• BDM (background debug mode)