MC68HC711E9FU Freescale Semiconductor, MC68HC711E9FU Datasheet - Page 61

MC68HC711E9FU

Manufacturer Part Number
MC68HC711E9FU
Description
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68HC711E9FU

Cpu Family
HC11
Device Core Size
8b
Frequency (max)
4MHz
Interface Type
SCI/SPI
Program Memory Type
EPROM
Program Memory Size
12KB
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
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
64
Package Type
PQFP
Lead Free Status / Rohs Status
Not Compliant
3.4 Conversion Process
The A/D conversion sequence begins one E-clock cycle after a write to the A/D control/status register,
ADCTL. The bits in ADCTL select the channel and the mode of conversion.
An input voltage equal to V
scale), with no overflow indication. For ratiometric conversions of this type, the source of each analog
input should use V
3.5 Channel Assignments
The multiplexer allows the A/D converter to select one of 16 analog signals. Eight of these channels
correspond to port E input lines to the MCU, four of the channels are internal reference points or test
functions, and four channels are reserved. Refer to
3.6 Single-Channel Operation
The two types of single-channel operation are:
Freescale Semiconductor
1. When SCAN = 0, the single selected channel is converted four consecutive times. The first result
2. When SCAN = 1, conversions continue to be performed on the selected channel with the fifth
is stored in A/D result register 1 (ADR1), and the fourth result is stored in ADR4. After the fourth
conversion is complete, all conversion activity is halted until a new conversion command is written
to the ADCTL register.
conversion being stored in register ADR1 (overwriting the first conversion result), the sixth
conversion overwriting ADR2, and so on.
RH
as the supply voltage and be referenced to V
1. Used for factory testing
RL
Table 3-1. Converter Channel Assignments
Channel
Number
converts to $00 and an input voltage equal to V
9 – 12
13
14
15
16
1
2
3
4
5
6
7
8
M68HC11E Family Data Sheet, Rev. 5.1
Reserved
Reserved
(V
Channel
Signal
V
V
RH
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
RH
RL
Table
)/2
(1)
(1)
(1)
(1)
3-1.
Result in ADRx
if MULT = 1
RL
ADR1
ADR2
ADR3
ADR4
ADR1
ADR2
ADR3
ADR4
ADR1
ADR2
ADR3
ADR4
.
RH
converts to $FF (full
Conversion Process
61

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