MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 328

• Manufacturer Part Number: MC68HC908SR12CFA
• Description: MICROCONTROLLER 48 PIN
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908SR12CFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, Temp Sensor
• Number Of I /o: 31
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Q1145673

Input/Output (I/O) Ports
Data Sheet
328
NOTE:
PWM[2:0] — PWM Channels 0 to 2
ATD[12:8] — ADC channels 8 to 12
Care must be taken when reading port C while applying analog voltages
to ATD[12:8] pins. If the appropriate ADC channel is not enabled,
excessive current drain may occur if analog voltages are applied to the
PTCx/ATDx pin, while PTC is read as a digital input. Those ports not
selected as analog input channels are considered digital I/O ports.
CD — Current Detect Output Pin
LED drive — Direct LED drive Pins
PWM[2:0] are pins used for the output channels from the pulse width
modulator (PWM) module. The PWM enables bit, PCH[2:0], in the
PWM control register define which port pin will be used as a PWM
output and overrides any control from the port I/O logic. The PWM0
function on PCT0/PWM0/CD pin can be overrided by the CD output
function. See
ATD[12:8] are pins used for the input channels to the analog-to-digital
converter module. The channel select bits, ADCH[4:0], in the ADC
status and control register define which port pin will be used as an
ADC input and overrides any control from the port I/O logic. See
Section 15. Analog-to-Digital Converter
The CD pin is used for the current detect output from the analog
module. The pin reflects the status of the current detect interrupt flag.
The current detect output enable bit, CDOEN, in the configuration
register 2 enables the PTC0/PWM0/CD pin as the CD output pin and
overrides any control from the port I/O or PWM logic. See
Analog
PTC7–PTC3 pins can be configured for direct LED drive. See
Port C LED Control Register
PTC0/PWM0/CD
Pin
Module.
Input/Output (I/O) Ports
Section 13. Pulse Width Modulator
Table 18-5. PTC0 Pin Configuration
CDOEN Bit
($001D)
0
0
1
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
(LEDC).
PCH0 Bit
($0051)
X
0
1
(ADC).
Freescale Semiconductor
(PWM).
Pin function
PWM0
PTC0
CD
Section 14.
18.5.3