MC908QY4AMDWER Freescale Semiconductor, MC908QY4AMDWER Datasheet - Page 193

• Manufacturer Part Number: MC908QY4AMDWER
• Description: IC MCU 8BIT 4K FLASH 16-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908QY4AMDWER

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

A.2.2 Enhanced Oscillator Module (OSC)
The QYxA contains a much enhanced oscillator module that allows more options than the QYx Classic.
A.2.2.1 Registers Affected
The OSCOPT bits are no longer in the CONFIG2 register and now reside in the OSCSC register. Also,
the ICFSx and ECFSx bits now reside in this register.
The IFS bits are used to select different Internal Oscillator speeds.
The ECFS bits are used to select the range of crystal that should be used to provide the reference clock.
Freescale Semiconductor
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The ICFS bits in the Oscillator Status and Control Register (OSCSC) allow the Internal Oscillator
to be configured for 1-, 2-, or 3.2-MHz operation. Also, the ECFS bits in the same register allow a
low, medium, or high crystal frequency range to be selected for the source of the system clock.
With this option you can choose to use a 32-kHz (low range) or a 16-MHz (high range) crystal.
Another improvement to the Oscillator Module design is that you can switch between internal
oscillator and external oscillator options at any time. For example, if you wanted the low power
advantage of running from a 32-kHz crystal but still needed some processing power to perform
math calculations you could switch back and forth between internal and external clock. The same
is true for switching between 1-, 2-, and 3.2-MHz internal oscillator options.
Reset:
Read:
Write:
Figure A-4. Oscillator Status and Control Register (OSCSC)
OSCOPT1 OSCOPT0
Bit 7
0
= Unimplemented
MC68HC908QYA/QTA Family Data Sheet, Rev. 3
6
0
ICFS1
5
1
ICFS0
4
0
ECFS1
3
0
ECFS0
2
0
ECGON
1
0
ECGST
Bit 0
0
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