MC68HC16Z1CFC16 Freescale Semiconductor, MC68HC16Z1CFC16 Datasheet - Page 110

• Manufacturer Part Number: MC68HC16Z1CFC16
• Description: IC MPU 1K RAM 16MHZ 132-PQFP
• Manufacturer: Freescale Semiconductor
• Series: HC16r

Specifications of MC68HC16Z1CFC16

• Core Processor: CPU16
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 132-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

5.3 System Clock
5-4
MODCLK
The system clock in the SIM provides timing signals for the IMB modules and for an
external peripheral bus. Because the MCU is a fully static design, register and memory
contents are not affected when the clock rate changes. System hardware and software
support changes in clock rate during operation.
The system clock signal can be generated from one of three sources. An internal
phase-locked loop (PLL) can synthesize the clock from a fast reference, a slow refer-
ence, or the clock signal can be directly input from an external frequency source.
The fast reference is typically a 4.194-MHz crystal; the slow reference is typically a
32.768-kHz crystal. Each reference frequency may be generated by sources other
than a crystal. Keep these sources in mind while reading the rest of this section.
Refer to
Figure 5-2
NOTES:
1. 128 IS PRESENT ONLY ON DEVICES WITH A FAST REFERENCE OSCILLATOR.
EXTAL
OSCILLATOR
CRYSTAL
APPENDIX A ELECTRICAL CHARACTERISTICS
Whether the PLL can use a fast or slow reference is determined by
the device. A particular device cannot use both a fast and slow refer-
ence.
is a block diagram of the clock submodule.
XTAL
Figure 5-2 System Clock Block Diagram
Freescale Semiconductor, Inc.
128
For More Information On This Product,
1
SYSTEM INTEGRATION MODULE
COMPARATOR
Go to: www.freescale.com
PHASE
SYSTEM CLOCK CONTROL
FEEDBACK DIVIDER
NOTE
LOW-PASS
FILTER
XFC
W
Y
X
for clock specifications.
V
VCO
DDSYN
M68HC16 Z SERIES
USER’S MANUAL
SYSTEM
CLOCK
Z SERIES PLL BLOCK
CLKOUT