MC68HC11E1CFN3R2 Freescale Semiconductor, MC68HC11E1CFN3R2 Datasheet - Page 58

• Manufacturer Part Number: MC68HC11E1CFN3R2
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC11E1CFN3R2

• 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

Analog-to-Digital (A/D) Converter
58
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
PE0
PE1
PE2
PE3
PE4
PE5
PE6
PE7
ANALOG
INPUT
PIN
* THIS ANALOG SWITCH IS CLOSED ONLY DURING THE 12-CYCLE SAMPLE TIME.
Figure 3-2. Electrical Model of an A/D Input Pin (Sample Mode)
ADR1 A/D RESULT 1
ANALOG
PROTECTION
MUX
< 2 pF
DEVICE
INPUT
Figure 3-1. A/D Converter Block Diagram
+ ~20 V
– ~0.7 V
M68HC11E Family Data Sheet, Rev. 5.1
RESULT
ADR2 A/D RESULT 2
SUCCESSIVE APPROXIMATION
+ ~12V
– ~0.7V
DUMMY N-CHANNEL
OUTPUT DEVICE
REGISTER AND CONTROL
WITH SAMPLE AND HOLD
RESULT REGISTER INTERFACE
8-BIT CAPACITIVE DAC
ADR3 A/D RESULT 3
DIFFUSION/POLY
ADCTL A/D CONTROL
JUNCTION
LEAKAGE
400 nA
COUPLER
ð 4 kΩ
ADR4 A/D RESULT 4
~ 20 pF
*
Freescale Semiconductor
CAPACITANCE
V
RL
DAC
V
V
INTERNAL
DATA BUS
RH
Rl