MC68HC11E0CFN3 Freescale Semiconductor, MC68HC11E0CFN3 Datasheet - Page 147

MC68HC11E0CFN3

Manufacturer Part Number
MC68HC11E0CFN3
Description
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68HC11E0CFN3

Cpu Family
HC11
Device Core Size
8b
Frequency (max)
3MHz
Interface Type
SCI/SPI
Program Memory Type
ROMLess
Program Memory Size
Not Required
Total Internal Ram Size
512Byte
# I/os (max)
38
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
3V
On-chip Adc
8-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
52
Package Type
PLCC
Lead Free Status / Rohs Status
Not Compliant

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PAII and PAIF — Pulse Accumulator Input Edge Interrupt Enable Bit and Flag
Freescale Semiconductor
The PAIF status bit is automatically set each time a selected edge is detected at the PA7/PAI/OC1 pin.
To clear this status bit, write to the TFLG2 register with a 1 in the corresponding data bit position (bit
4). The PAII control bit allows configuring the pulse accumulator input edge detect for polled or
interrupt-driven operation but does not affect setting or clearing the PAIF bit. When PAII is 0, pulse
accumulator input interrupts are inhibited, and the system operates in a polled mode. In this mode, the
PAIF bit must be polled by user software to determine when an edge has occurred. When the PAII
control bit is set, a hardware interrupt request is generated each time PAIF is set. Before leaving the
interrupt service routine, software must clear PAIF by writing to the TFLG2 register.
M68HC11E Family Data Sheet, Rev. 5.1
Pulse Accumulator
147

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