Freescale Semiconductor MC68HC908MR32 Manuale Utente
Pin Assignments
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Freescale Semiconductor
23
1.4.6 External Filter Capacitor Pin (CGMXFC)
CGMXFC is an external filter capacitor connection for the CGM. See
1.4.7 Analog Power Supply Pins (V
DDAD
and V
SSAD
)
V
DDAD
and V
SSAD
are the power supply pins for the analog-to-digital converter. Decoupling of these pins
should be per the digital supply. See
1.4.8 ADC Voltage Decoupling Capacitor Pin (V
REFH
)
V
REFH
is the power supply for setting the reference voltage. Connect the V
REFH
pin to the same voltage
potential as V
DDAD
.
1.4.9 ADC Voltage Reference Low Pin (V
REFL
)
V
REFL
is the lower reference supply for the ADC. Connect the V
REFL
pin to the same voltage potential as
V
SSAD
.
1.4.10 Port A Input/Output (I/O) Pins (PTA7–PTA0)
PTA7–PTA0 are general-purpose bidirectional input/output (I/O) port pins. See
.
1.4.11 Port B I/O Pins (PTB7/ATD7–PTB0/ATD0)
Port B is an 8-bit special function port that shares all eight pins with the analog-to-digital converter (ADC).
See
See
and
.
1.4.12 Port C I/O Pins (PTC6–PTC2 and PTC1/ATD9–PTC0/ATD8)
PTC6–PTC2 are general-purpose bidirectional I/O port pins
. PTC1/ATD9–PTC0/ATD8 are special function port pins that are shared with the
analog-to-digital converter (ADC). See
and
.
1.4.13 Port D Input-Only Pins (PTD6/IS3–PTD4/IS1 and PTD3/FAULT4–PTD0/FAULT1)
PTD6/IS3–PTD4/IS1 are special function input-only port pins that also serve as current sensing pins for
the pulse-width modulator module (PWMMC). PTD3/FAULT4–PTD0/FAULT1 are special function port
pins that also serve as fault pins for the PWMMC. See
the pulse-width modulator module (PWMMC). PTD3/FAULT4–PTD0/FAULT1 are special function port
pins that also serve as fault pins for the PWMMC. See
and
.
1.4.14 PWM Pins (PWM6–PWM1)
PWM6–PWM1 are dedicated pins used for the outputs of the pulse-width modulator module (PWMMC).
These are high-current sink pins. See
These are high-current sink pins. See
and
.