MC68HC908RF2MFA Freescale Semiconductor, MC68HC908RF2MFA Datasheet - Page 86

• Manufacturer Part Number: MC68HC908RF2MFA
• Description: IC MCU 2K FLASH 4MHZ 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908RF2MFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: LVD, POR, PWM, RF Mod
• Number Of I /o: 12
• Program Memory Size: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

Internal Clock Generator Module (ICG)
6.6 Configuration Register Option
6.6.1 EXTSLOW
6.7 I/O Registers
Data Sheet
86
Addr.
$0036
$0037
Multiplier Register (ICGMR)
Control Register (ICGCR)
Internal Clock Generator
Internal Clock Generator
Register Name
See page 88.
See page 90.
One configuration register option affects the functionality of the ICG: EXTSLOW
(slow external clock).
All configuration register options will have a default setting. Refer to
Configuration Register (CONFIG)
Slow external clock (EXTSLOW), when set, will decrease the drive strength of the
oscillator amplifier, enabling low-frequency crystal operation (30 kHz–100 kHz).
When clear, EXTSLOW enables high frequency crystal operation (1 MHz to
8 MHz).
EXTSLOW, when set, also configures the clock monitor to expect an external clock
source that is slower than the low-frequency base clock (60 Hz–307.2 kHz). When
EXTSLOW is clear, the clock monitor will expect an external clock faster than the
low-frequency base clock (307.2 kHz–32 MHz).
The default state for this option is clear.
The ICG contains five registers, summarized in
Several of the bits in these registers have interaction where the state of one bit may
force another bit to a particular state or prevent another bit from being set or
cleared. A summary of this interaction is shown in
•
•
•
•
•
Reset:
Reset:
Read:
Read:
Write:
Write:
ICG control register, ICGCR
ICG multiplier register, ICGMR
ICG trim register, ICGTR
ICG DCO divider control register, ICGDVR
ICG DCO stage control register, ICGDSR
Freescale Semiconductor, Inc.
Figure 6-10. ICG I/O Register Summary
For More Information On This Product,
CMIE
Bit 7
Internal Clock Generator Module (ICG)
R
0
0
Go to: www.freescale.com
CMF
N6
6
0
0
CMON
N5
5
0
0
on how the configuration register is used.
CS
N4
4
0
1
Figure
ICGON
N3
3
1
0
Table
6-10. These registers are:
6-5.
ICGS
MC68HC908RF2 — Rev. 4.0
N2
2
0
1
ECGON
N1
1
0
0
Section 3.
MOTOROLA
ECGS
Bit 0
N0
0
1