MC68HC908JB16DW Freescale Semiconductor, MC68HC908JB16DW Datasheet - Page 93

• Manufacturer Part Number: MC68HC908JB16DW
• Description: IC MCU 16K FLASH 6MHZ USB 28SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB16DW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 6MHz
• Connectivity: SCI, USB
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

7.1 Contents
7.2 Introduction
MC68HC908JB16
Freescale Semiconductor
Technical Data — MC68HC908JB16
—
Rev. 1.1
7.2
7.3
7.4
7.4.1
7.4.2
7.4.3
7.4.4
7.4.5
7.4.6
7.5
7.5.1
7.5.2
7.6
The oscillator circuit is designed for use with crystals or ceramic
resonators. The oscillator circuit generates the crystal clock signal,
OSCXCLK, and passes through a clock doubler to produce OSCDCLK.
This clock doubler clock is further divided by two before being passed on
to the system integration module (SIM) for bus clock generation.
Figure 7-1
various external components.
The MC68HC908JB16 operates from a nominal 12MHz crystal,
providing a 6MHz internal bus clock. The 12MHz clock is required for
various modules, such as the CGMs and USB. The clock doubler clock,
OSCDCLK, is used as the base clock for the COP module.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Oscillator During Break Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 96
Oscillator External Connections . . . . . . . . . . . . . . . . . . . . . . . .94
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Crystal Amplifier Input Pin (OSC1). . . . . . . . . . . . . . . . . . . . 95
Crystal Amplifier Output Pin (OSC1) . . . . . . . . . . . . . . . . . . 95
Oscillator Enable Signal (SIMOSCEN). . . . . . . . . . . . . . . . . 95
Crystal Output Frequency Signal (OSCXCLK). . . . . . . . . . . 95
Clock Doubler Out (OSCDCLK) . . . . . . . . . . . . . . . . . . . . . . 95
Oscillator Out (OSCOUT). . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
shows the structure of the oscillator. The oscillator requires
Oscillator (OSC)
Section 7. Oscillator (OSC)
Technical Data
93