MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 205

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 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
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.8.1 Pulse Accumulator Control Register
M68HC11E Family — Rev. 3.2
MOTOROLA
Address:
Four of this register’s bits control an 8-bit pulse accumulator system.
Another bit enables either the OC5 function or the IC4 function, while two
other bits select the rate for the real-time interrupt system.
DDRA7 — Data Direction for Port A Bit 7
PAEN — Pulse Accumulator System Enable Bit
PAMOD — Pulse Accumulator Mode Bit
PEDGE — Pulse Accumulator Edge Control Bit
Reset:
Read:
Write:
Refer to
This bit has different meanings depending on the state of the PAMOD
bit, as shown in
Figure 9-25. Pulse Accumulator Control Register (PACTL)
0 = Pulse accumulator disabled
1 = Pulse accumulator enabled
0 = Event counter
1 = Gated time accumulation
DDRA7
$1026
Bit 7
PAMOD
0
Section 6. Parallel Input/Output (I/O)
0
0
1
1
Table 9-7. Pulse Accumulator Edge Control
PAEN
Timing System
6
0
Table
PEDGE
0
1
0
1
PAMOD
9-7.
5
0
PAI falling edge increments the counter.
PAI rising edge increments the counter.
A 0 on PAI inhibits counting.
A 1 on PAI inhibits counting.
PEDGE
4
0
Action on Clock
DDRA3
3
0
I4/O5
2
0
Ports.
Pulse Accumulator
RTR1
1
0
Timing System
Technical Data
RTR0
Bit 0
0
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