MC68HC908LB8CPE Freescale Semiconductor, MC68HC908LB8CPE Datasheet - Page 54

• 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: -

Op Amp/Comparator Module
4.4 Functional Description
The op amp/comparator module has two modes of operation — op amp mode and comparator mode. Op
amp mode optimizes the module for accurate signal amplification with low input offset voltage.
Comparator mode optimizes the module for use as a comparator with fast output response.
The output of the op amp/comparator shares its pin with an analog-to-digital converter (ADC6) channel.
The fault function of the PWM can also be switched to share this pin. The ADC channel function and the
op amp output can be enabled simultaneously so that the output of the op amp could be sampled directly
by the associated ADC channels. See
54
Notes:
1. Pin contains integrated pullup device.
2. Fault function switchable between pins PTB2 and PTB7.
USER FLASH VECTOR SPACE — 34 BYTES
REGISTERS
V
V
ROUTINES ROM — 674 BYTES
CPU
DD
SS
MONITOR ROM — 350 BYTES
USER FLASH — 8 KBYTES
REGISTERS — 64 BYTES
USER RAM — 128 BYTES
CONTROL AND STATUS
FLASH PROGRAMMING
Figure 4-1. Block Diagram Highlighting Op Amp/Comparator Block and Pins
M68HC08 CPU
Setting an op amp/comparator enable control bit (OACE) and an op
amp/comparator module selected control bit (OACM) forces V+ and V– to
be inputs and V
SYSTEM INTEGRATION
ARITHMETIC/LOGIC
OSCILLATOR
MODULE
MODULE
UNIT (ALU)
POWER
OUT
to be an output, overriding the data direction register.
MC68HC908LB8 Data Sheet, Rev. 1
Figure 4-2.
8-BIT ANALOG-TO-DIGITAL
HIGH RESOLUTION PWM
COMPUTER OPERATING
KEYBOARD INTERRUPT
OP AMP/COMPARATOR
LOW-VOLTAGE INHIBIT
CONVERTER MODULE
DUAL CHANNEL PWM
NOTE
PROPERLY MODULE
2-CHANNEL TIMER
INTERNAL BUS
MODULE
MODULE
MODULE
MODULE
MODULE
MODULE
Freescale Semiconductor
PTA6
PTA5
PTA4
PTA3
PTA2
PTA1
PTA0
PTB7/V
PTB6/V–
PTB5/V+
PTB4/PWM1
PTB3/PWM0
PTB2/FAULT
PTB1/BOT
PTB0/TOP
PTC2
PTC1
PTC0
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
/AD5/TCH0/KBI6
/RST/KBI5
/AD4/KBI4
/AD3/KBI3
/AD2/KBI2
/AD1/KBI1
/AD0/KBI0
OUT
/SHTDWN/IRQ
/OSC2
/OSC1
/AD6/FAULT
(2)
(2)