MC68HC711K4CFN4 Freescale Semiconductor, MC68HC711K4CFN4 Datasheet - Page 60

• Manufacturer Part Number: MC68HC711K4CFN4
• Description: IC MCU 24K OTP 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711K4CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 62
• Program Memory Size: 24KB (24K x 8)
• Program Memory Type: OTP
• Eeprom Size: 640 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: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9 Analog-to-Digital Converter
60
MOTOROLA
The analog-to-digital (A/D) converter system uses an all-capacitive charge-redistribution technique to
convert analog signals to digital values. The A/D converter system contained in M68HC11 K-series
MCUs is an 8-channel,8-bit, multiplexed-input, successive-approximation converter. It does not require
external sample and hold circuits.
The clock source for the A/D converter’s charge pump, like the clock source for the EEPROM charge
pump, is selected with the CSEL bit in the OPTION register. When the E clock is slower than 1 MHz,
the CSEL bit must be set to ensure that the successive approximation sequence for the A/D converter
will be completed before any charge loss occurs. In the case of the EEPROM, it is the efficiency of the
charge pump that is affected.
The A/D converter can operate in single or multiple conversion modes. Multiple conversions are per-
formed in sequences of four. Sequences can be performed on a single channel or an a group of chan-
nels.
Dedicated lines V
PE0/
PE1/
PE2/
PE3/
PE4/
PE5/
PE6/
PE7/
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
ANALOG
ADDR 1 A/D RESULT 1
MUX
RH
and V
Freescale Semiconductor, Inc.
RESULT
For More Information On This Product,
RL
Figure 14 A/D Converter Block Diagram
provide the reference supply voltage inputs.
ADDR 2 A/D RESULT 2
SUCCESSIVE APPROXIMATION
REGISTER AND CONTROL
WITH SAMPLE AND HOLD
8-BIT CAPACITIVE DAC
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RESULT REGISTER INTERFACE
ADDR 3 A/D RESULT 3
ADCTL A/D CONTROL
ADDR 4 A/D RESULT 4
M68HC11 K Series
MC68HC11KTS/D
V RH
V RL
DATA BUS
INTERNAL