MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 133

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• 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: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

ADON — A/D converter on
The ADON bit allows the user to enable/disable the A/D converter.
When the A/D converter is switched on, it takes a time t
(see
Power-on or external reset will clear the ADON bit, thus disabling the A/D converter.
CH3–CH0 — A/D channels 3, 2, 1 and 0
The CH3–CH0 bits allow the user to determine which channel of the A/D converter multiplexer is
selected. See
Reset clears the CH0–CH3 bits.
9.3
When the MCU enters STOP mode with the A/D converter turned on, the A/D clocks are stopped
and the A/D converter is disabled for the duration of STOP mode, including the 4064 cycles
start-up time. If the A/D RC oscillator is in operation it will also be disabled.
MC68HC05X16
Table
1 (set)
0 (clear) –
12-3). During this time A/D conversion results may be inaccurate.
Table 9-2
A/D converter during STOP mode
Freescale Semiconductor, Inc.
–
For More Information On This Product,
A/D converter is switched on.
A/D converter is switched off.
for channel selection.
CH3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
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ANALOG TO DIGITAL CONVERTER
Table 9-2 A/D channel assignment
CH2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CH0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ADON
Channel selected
(VRH + VRL) / 2
VRH pin (high)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
VRL pin (low)
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
for the current sources to stabilize
9-5
9