mc68hc705v12 Freescale Semiconductor, Inc, mc68hc705v12 Datasheet - Page 32

• Manufacturer Part Number: mc68hc705v12
• Description: M68hc05-based Mcu Hc05 Freescale Semiconductor
• Manufacturer: Freescale Semiconductor, Inc

General Description
1.7.8 PA0–PA6
1.7.9 PB0–PB3 (SPI Pins), PB4/PWMA, PB5/PWMB, PB6/TCMP, and PB7/TCAP
Advance Information
the IRQ pin is not used, it must be tied to the V
contains an internal Schmitt trigger as part of its input to improve noise
immunity. Each of the PC0–PC7 I/O pins may be connected as an OR
function with the IRQ interrupt function. This capability allows keyboard
scan applications where the transitions on the I/O pins will behave the
same as the IRQ pin. The edge or level sensitivity selected by a mask
option for the IRQ pin does not apply to the port C I/O pin interrupt. The
I/O pin interrupt is always negative edge-sensitive. See
Interrupts
This pin is also used to provide the programming voltage for the EPROM
array. See
EPROM programming.
These seven I/O lines comprise port A. The state of any pin is software
programmable, and all port A lines are configured as inputs during
power-on or reset. See
details on the I/O ports.
These eight I/O lines comprise port B. The state of any pin is software
programmable, and all port B lines are configured as inputs during
power-on or reset. See
details on the I/O ports.
PB0–PB3 are shared SPI functions. See
Interface (SPI)
configuration of these pins.
PB6 and PB7 are also shared with timer functions. The TCAP pin
controls the input capture feature for the on-chip 16-bit timer. The TCMP
pin provides an output for the output compare feature of the on-chip
16-bit timer. See
operation of the timer subsystem.
Freescale Semiconductor, Inc.
For More Information On This Product,
Section 12. EPROM and EEPROM
for more details on the interrupts.
Go to: www.freescale.com
General Description
for more details concerning the operation of the SPI and
Section 9. 16-Bit Timer
Section 7. Parallel Input/Output (I/O)
Section 7. Parallel Input/Output (I/O)
Section 10. Serial Peripheral
for more details on the
DD
MC68HC705V12
for more details on
supply. The IRQ pin
Section 4.
—
for more
for more
Rev. 3.0