MC9S12B128_05 Datasheet, PDF (21/132 Pages) Motorola, Inc – Covers also preliminary MC9S12B64 using MC9S12B128 die

Section 1 Introduction
Device User Guide —9S12B128DGV1/D V01.13
1.1 Overview
The MC9S12B128 microcontroller unit (MCU) is a 16-bit device composed of standard on-chip
peripherals including a 16-bit central processing unit (CPU12), 128K bytes of Flash EEPROM, 4K bytes
of RAM, 1K bytes of EEPROM, two asynchronous serial communications interfaces (SCI), serial
peripheral interface (SPI), an input capture/output compare timer (TIM), 16- channel, 10-bit
analog-to-digital converter (ADC), an 8-channel pulse-width modulator (PWM), one CAN 2.0 A, B
software compatible module (MSCAN12) and an Inter-IC Bus. The MC9S12B128 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. In addition to the I/O ports
available in each module, up to 22 I/O ports are available with 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. 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,
– COP watchdog,
– Real time interrupt,
– Clock monitor
• 8-bit and 4-bit ports with interrupt functionality
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