HCS12COREUG View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
MFG CO.
'HCS12COREUG' PDF : 124 Pages View PDF
Section 1 Introduction
MC9S12H256 Device User Guide — V01.14
1.1 Overview
The MC9S12H256 microcontroller unit (MCU) is a 16-bit device composed of standard on-chip
peripherals including a 16-bit central processing unit (HCS12 CPU), 256K bytes of Flash EEPROM, 12K
bytes of RAM, 4K bytes of EEPROM, two asynchronous serial communications interfaces (SCI), a serial
peripheral interface (SPI), an IIC-bus interface (IIC), an 8-channel 16-bit timer (TIM), a 16-channel, 10-bit
analog-to-digital converter (ATD), a six-channel pulse width modulator (PWM), and two CAN 2.0 A, B
software compatible modules (MSCAN).
In addition, it features a 32x4 liquid crystal display (LCD) controller/driver and a motor pulse width
modulator (MC) consisting of 24 high current outputs suited to drive up to 6 stepper motors. System
resource mapping, clock generation, interrupt control, and bus interfacing are managed by the HCS12
Core.
The MC9S12H256 has full 16-bit data paths throughout. The inclusion of a PLL circuit allows power
consumption and performance to be adjusted to suit operational requirements. In addition to the I/O ports
available in each module, 12 general purpose I/O pins are available with interrupt and wake-up capability
from STOP or WAIT mode.
1.2 Features
• HCS12 Core
– 16-bit HCS12 CPU
i. Upward compatible with M68HC11 instruction set
ii. Interrupt stacking and programmer’s model identical to M68HC11
iii. 20-bit ALU
iv. Instruction queue
v. Enhanced indexed addressing
– MEBI (Multiplexed External Bus Interface)
– MMC (Module Mapping Control)
– INT (Interrupt control)
– BKP (Breakpoints)
– BDM (Background Debug Mode)
• CRG (low current oscillator, PLL, reset, clocks, COP watchdog, real time interrupt, clock monitor)
• 8-bit and 4-bit ports with interrupt functionality
– Digital filtering
– Programmable rising or falling edge trigger
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