MC68HC16Z1

The MC68HC16Z1 is a high-speed 16-bit control unit that is upwardly code compatible with M68HC11 controllers. It is a member of the M68300/68HC16 Family of modular microcontrollers.

M68HC16 controllers are built up from standard modules that interface through a common internal bus. Standardization facilitates rapid development of devices tailored for specific applications.

The MC68HC16Z1 incorporates a true 16-bit central processing unit (CPU16), a system integration module (SIM), an 8/10-bit analog-to-digital converter (ADC), a queued serial module (QSM), a generalpurpose timer (GPT), and a 2048-byte standby RAM (SRAM). These modules are interconnected by the intermodule bus (IMB).

Maximum system clock for the MC68HC16Z1 is 16.78 MHz. A phase-locked loop circuit synthesizes the clock from a frequency reference. Either a crystal (nominal frequency: 32.768 kHz) or an externally generated signal can be used. System hardware and software support changes in clock rate during operation. Because the MC68HC16Z1 is a fully static design, register and memory contents are not affected by clock rate changes.

High-density complementary metal-oxide semiconductor (HCMOS) architecture makes the basic power consumption of the MC68HC16Z1 low. Power consumption can be minimized by stopping the system clock. The M68HC16 instruction set includes a low-power stop (LPSTOP) command that efficiently implements this capability.