MC68HC908RF2CFA Freescale Semiconductor, MC68HC908RF2CFA Datasheet - Page 116

• Manufacturer Part Number: MC68HC908RF2CFA
• Description: IC MCU W/UHF TX 2K FLASH 32LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908RF2CFA

• 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 ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

System Integration Module (SIM)
10.3 Reset and System Initialization
10.3.1 External Pin Reset
10.3.2 Active Resets from Internal Sources
Data Sheet
116
The MCU has these reset sources:
All of these resets produce the vector $FFFE–FFFF ($FEFE–FEFF in monitor
mode) and assert the internal reset signal (IRST). IRST causes all registers to be
returned to their default values and all modules to be returned to their reset states.
An internal reset clears the SIM counter (see
reset does not. Each of the resets sets a corresponding bit in the SIM reset status
register (SRSR). (See
Pulling the asynchronous RST pin low halts all processing. The PIN bit of the SIM
reset status register (SRSR) is set as long as RST is held low for a minimum of 67
CGMXCLK cycles, assuming that neither the POR nor the LVI was the source of
the reset.
Figure 10-4
All internal reset sources actively pull the RST pin low for 32 CGMXCLK cycles to
allow resetting of external peripherals. The internal reset signal IRST continues to
be asserted for an additional 32 cycles. (See
be caused by an illegal address, illegal opcode, COP timeout, LVI, or POR. (See
Figure
CGMXCLK cycles during which the SIM forces the RST pin low. The internal reset
CGMOUT
•
•
•
•
•
•
RST
IAB
Power-on reset module (POR)
External reset pin (RST)
Computer operating properly module (COP)
Low-voltage inhibit module (LVI)
Illegal opcode
Illegal address
Freescale Semiconductor, Inc.
10-6.) Note that for LVI or POR resets, the SIM cycles through 4096
For More Information On This Product,
PC
shows the relative timing of an external reset recovery.
System Integration Module (SIM)
Figure 10-4. External Reset Recovery Timing
Go to: www.freescale.com
PULLED LOW EXTERNAL
10.7 SIM
PULLED HIGH EXTERNAL
Registers.)
Figure
10.4 SIM
VECT H
10-5.) An internal reset can
Counter), but an external
MC68HC908RF2 — Rev. 4.0
VECT L
MOTOROLA