MCHC705JJ7CPE Freescale Semiconductor, MCHC705JJ7CPE Datasheet - Page 73

• Manufacturer Part Number: MCHC705JJ7CPE
• Description: IC MCU 8BIT 224 BYTES RAM 20PDIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MCHC705JJ7CPE

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SIO
• Peripherals: POR, Temp Sensor, WDT
• Number Of I /o: 14
• Program Memory Size: 6KB (6K x 8)
• Program Memory Type: OTP
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Processor Series: HC705JJ
• Core: HC05
• Data Bus Width: 8 bit
• Data Ram Size: 224 B
• Interface Type: SIOP
• Maximum Clock Frequency: 2.1 MHz
• Number Of Programmable I/os: 14
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 4 Channel
• Package: 20PDIP
• Family Name: HC05
• Maximum Speed: 2.1 MHz
• Operating Supply Voltage: 3.3|5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

8.2 Analog Multiplex Register
The analog multiplex register (AMUX) controls the general interconnection and operation. The control bits
in the AMUX are shown in
HOLD, DHOLD
Freescale Semiconductor
These read/write bits control the source connection to the negative input of voltage comparator 2
shown in
selection bus, or the divide-by-two channel selection bus to charge the internal sample capacitor and
to also be presented to comparator 2. The decoding of these sources is given in
During the hold case when both the HOLD and DHOLD bits are clear, the VOFF bit in the analog status
register (ASR) can offset the V
offset source is bypassed whenever the sample capacitor is being charged with either the HOLD or
DHOLD bit set. The VOFF bit must be enabled by the OPT bit in the COPR at location $1FF0.
Figure
Address:
TEMPERATURE
Reset:
Read:
Write:
INTERNAL
DIODE
SELECTION
CHANNEL
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
8-3. This allows the voltage on the internal temperature sensing diode, the channel
BUS
$0003
HOLD
Bit 7
1
V
DD
Figure
Figure 8-2. Analog Multiplex Register (AMUX)
Figure 8-3. Comparator 2 Input Circuit
DHOLD
OFFSET
V
SS
8-2.
6
0
SS
80 kΩ
80 kΩ
reference on the sample capacitor by approximately 100 mV. This
INV
5
0
PB0
SAMPLE
CAP
+
–
VREF
COMP2
4
0
MUX4
3
0
MUX3
2
0
MUX2
1
0
Analog Multiplex Register
V
OPT (MOR)
HOLD
DHOLD
OFF
Table
MUX1
Bit 0
0
8-1.
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