MC68HC908MR16CFU Freescale Semiconductor, MC68HC908MR16CFU Datasheet - Page 73

• Manufacturer Part Number: MC68HC908MR16CFU
• Description: IC MCU 8MHZ 16K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908MR16CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 44
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Chapter 5
Configuration Register (CONFIG)
5.1 Introduction
This section describes the configuration register (CONFIG). This register contains bits that configure
these options:
5.2 Functional Description
The configuration register (CONFIG) is used in the initialization of various options. The configuration
register can be written once after each reset. All of the configuration register bits are cleared during reset.
Since the various options affect the operation of the microcontroller unit (MCU), it is recommended that
this register be written immediately after reset. The configuration register is located at $001F and may be
read at anytime.
Freescale Semiconductor
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Resets caused by the low-voltage inhibit (LVI) module
Power to the LVI module
Computer operating properly (COP) module
Top-side pulse-width modulator (PWM) polarity
Bottom-side PWM polarity
Edge-aligned versus center-aligned PWMs
Six independent PWMs versus three complementary PWM pairs
On a FLASH device, the options are one-time writeable by the user after
each reset. The registers are not in the FLASH memory but are special
registers containing one-time writeable latches after each reset. Upon a
reset, the configuration register defaults to predetermined settings as
shown in
If the LVI module and the LVI reset signal are enabled, a reset occurs when
V
nine consecutive central processor unit (CPU) cycles. Once an LVI reset
occurs, the MCU remains in reset until V
DD
falls to a voltage, V
Figure
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
5-1.
LVRx
, and remains at or below that level for at least
NOTE
DD
rises to a voltage, V
LVRX
.
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