MC68HC11E1CFN3 Freescale Semiconductor, MC68HC11E1CFN3 Datasheet - Page 158

• Manufacturer Part Number: MC68HC11E1CFN3
• Description: IC MCU 3MHZ 512 EEPROM 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11E1CFN3

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Type: ROMless
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 3 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 16 bit
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

Timing System
9.5.2 Timer Interrupt Flag Register 2
Data Sheet
158
Bits of this register indicate the occurrence of timer system events. Coupled with
the four high-order bits of TMSK2, the bits of TFLG2 allow the timer subsystem to
operate in either a polled or interrupt driven system. Each bit of TFLG2
corresponds to a bit in TMSK2 in the same position.
Clear flags by writing a 1 to the corresponding bit position(s).
TOF — Timer Overflow Interrupt Flag
RTIF — Real-Time Interrupt Flag
PAOVF — Pulse Accumulator Overflow Interrupt Flag
PAIF — Pulse Accumulator Input Edge Interrupt Flag
Bits [3:0] — Unimplemented
Set when TCNT changes from $FFFF to $0000
The RTIF status bit is automatically set to 1 at the end of every RTI period. To
clear RTIF, write a byte to TFLG2 with bit 6 set.
Refer to
Refer to
Always read 0
Address:
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
For More Information On This Product,
9.7 Pulse
9.7 Pulse
$1025
Bit 7
TOF
Figure 9-22. Timer Interrupt Flag 2 Register (TFLG2)
0
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= Unimplemented
RTIF
Accumulator.
Accumulator.
6
0
Timing System
PAOVF
5
0
PAIF
4
0
3
0
M68HC11E Family — Rev. 5
2
0
1
0
MOTOROLA
Bit 0
0