MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 55

• Manufacturer Part Number: MC68HC908LB8CPE
• Description: IC MCU 8K FLASH 8MHZ 20DIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908LB8CPE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVR, POR, PWM
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 7x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

4.5 Low Power Modes
4.5.1 Wait Mode
The WAIT instruction places the MCU in a low power consumption mode. While in WAIT the op
amp/comparator cannot be enabled or disabled. If the op amp/comparator module is not needed during
wait mode, reduce power consumption by disabling the op amp/comparator before executing the WAIT
command.
4.5.2 Stop Mode
The op amp/comparator is inactive after execution of the STOP command. The
op amp/comparator will be in a low-power state and will not drive its output pin. When the MCU exits stop
mode after and external interrupt, the op amp/comparator continues operation.
4.6 Op Amp/Comparator Control Register
There is a single operational control register (OACCR) that contains the enable bit for the op
amp/comparator.
OACM — Op Amp/Comparator Mode Select Bit
Freescale Semiconductor
This bit selects between 2 modes of operation, op amp mode and comparator mode.
1 = Op amp mode selected
Address: $0039
In order to read the digital states of the pins configured as inputs, the data
direction register bit must be a 0; to read the states of the pins configured
as outputs the data direction register bit must be a 1.
Reset:
Read:
Write:
GROUND
GROUND
Figure 4-3. Op Amp/Comparator Control Register (OACCR)
V+
V–
OACM
Bit 7
0
Figure 4-2. Op Amp/Comparator Block Diagram
= Unimplemented
U
6
OACE
OACE
MC68HC908LB8 Data Sheet, Rev. 1
U
5
U
4
U = Unaffected
+
-
OACE
U
3
U
2
OACE
U
1
V
FLOATING
OUT
OACE
Bit 0
0
Low Power Modes
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