MC9S12D64 Datasheet, PDF (19/128 Pages) Freescale Semiconductor, Inc – Device User Guide V01.20

Section 1 Introduction
MC9S12DJ64 Device User Guide — V01.20
1.1 Overview
The MC9S12DJ64 microcontroller unit (MCU) is a 16-bit device composed of standard on-chip
peripherals including a 16-bit central processing unit (HCS12 CPU), 64K bytes of Flash EEPROM, 4K
bytes of RAM, 1K bytes of EEPROM, two asynchronous serial communications interfaces (SCI), one
serial peripheral interfaces (SPI), an 8-channel IC/OC enhanced capture timer, two 8-channel, 10-bit
analog-to-digital converters (ADC), an 8-channel pulse-width modulator (PWM), a digital Byte Data Link
Controller (BDLC), 29 discrete digital I/O channels (Port A, Port B, Port K and Port E), 20 discrete digital
I/O lines with interrupt and wakeup capability, a CAN 2.0 A, B software compatible modules
(MSCAN12), and an Inter-IC Bus. The MC9S12DJ64 has full 16-bit data paths throughout. However, the
external bus can operate in an 8-bit narrow mode so single 8-bit wide memory can be interfaced for lower
cost systems. The inclusion of a PLL circuit allows power consumption and performance to be adjusted to
suit operational requirements.
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. Instruction queue
iv. Enhanced indexed addressing
– MEBI (Multiplexed External Bus Interface)
– MMC (Module Mapping Control)
– INT (Interrupt control)
– BKP (Breakpoints)
– BDM (Background Debug Mode)
• CRG (low current Colpitts or Pierce 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
• Memory
– 64K Flash EEPROM
– 1K byte EEPROM
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