Pins - Fujitsu 8FX Hardware Manual

CHAPTER 11 8/16-BIT COMPOSITE TIMER

11.4 Pins

11.4 Pins
This section describes the pins of the 8/16-bit composite timer.
■ Pins of 8/16-bit Composite Timer
The external pins of the 8/16-bit composite timer are TOn0, TOn1 and ECn. TII0 is for internal
chip connection.
● TOn0 pin
TOn0:
This pin serves as the timer output pin for timer n0 in 8-bit operation or for timers n0 and n1
in 16-bit operation. When the output is enabled (Tn0CR1:OE = 1) in the interval timer
function, PWM timer function, or PWC timer function, this pin becomes an output pin
automatically regardless of the port direction register (DDR) and functions as the timer
output TOn0 pin.
The output becomes undetermined if output is enabled with the input capture function in use.
● TOn1 pin
TOn1:
This pin serves as the timer output pin for timer n1 in 8-bit operation. When the output is
enabled (Tn1CR1:OE = 1) in interval timer function, PWM timer function (fixed-cycle
mode), or PWC timer function, the pin becomes an output pin automatically regardless of the
port direction register (DDR) and functions as the timer output TOn1 pin.
In 16-bit operation, if output is enabled with the PWM timer function (variable-cycle mode)
or input capture function in use, the output becomes undetermined.
● ECn pin
The ECn pin is connected to the ECn0 and ECn1 internal pins.
ECn0 internal pin:
This pin serves as the external count clock input pin for timer n0 when the interval timer
function or PWM timer function is selected, or as the signal input pin for timer n0 when the
PWC timer function or input capture function is selected. The pin cannot be set to serve as
the external count clock input pin when the PWC timer function or input capture function is
selected.
To use the input function mentioned above, set the bit in the port direction register
corresponding to ECn pin to "0" to make the pin as an input port.
ECn1 internal pin:
This pin serves as the external count clock input pin for timer n1 when the interval timer
function or PWM timer function is selected, or as the signal input pin for timer n1 when the
PWC timer function or input capture function is selected. The pin cannot be set to serve as
the external count clock input pin when the PWC timer function or input capture function is
selected.
In 16-bit operation, the input function of this pin is not used. If the PWM timer function
(variable-cycle mode) is selected, the input function of this pin can also be used.
To use the input function mentioned above, set the bit in the port direction register
corresponding to ECn pin to "0" to make the pin as an input port.
142 FUJITSU SEMICONDUCTOR LIMITED
MB95630H Series
MN702-00009-2v0-E