MC68HC711P2CFN4 Freescale Semiconductor, MC68HC711P2CFN4 Datasheet - Page 175

• Manufacturer Part Number: MC68HC711P2CFN4
• Description: IC MCU 32K OTP 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711P2CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 640 x 8
• Ram Size: 1K 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: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.3.1 Multiplexer
MC68HC11P2 — Rev 1.0
The multiplexer selects one of 16 inputs for conversion. Input selection
is controlled by the value of bits CD – CA in the ADCTL register. The
eight port E pins are fixed-direction analog inputs to the multiplexer, and
additional internal analog signal lines are routed to it.
Port E pins can also be used as digital inputs. Digital reads of port E pins
are not recommended during the sample portion of an A/D conversion
cycle, when the gate signal to the N-channel input gate is on. Because
no P-channel devices are directly connected to either input pins or
reference voltage pins, voltages above V
problem, although current should be limited according to maximum
ratings. Refer to
pin.
Figure 9-2. Electrical model of an A/D input pin (in sample mode)
Freescale Semiconductor, Inc.
Analog
For More Information On This Product,
input
Note 1: The analog switch is closed only during the 12 cycle sample time
Note 2: All component values are approximate
Analog-to-Digital Converter
Go to: www.freescale.com
Figure
<2pF
protection
device
Input
–0.7V
+20V
9-2, which is a functional diagram of an input
DD
leakage
junction
Diffusion and
400nA
poly coupler
do not cause a latchup
ð4k¾
Analog-to-Digital Converter
capacitance
Note 1
DAC
Technical Data
20pF
Overview
V
RL