Fujitsu F2MC-8FX Hardware Manual page 259

Table 16.5-2 Functional Description of Each Bit of 8/16-bit Composite Timer 00/01 Control Status Register
1 (1 / 2)
Bit name
STA:
bit7 Timer operation enable
bit
HO:
bit6
Timer suspend bit
IE:
bit5 Interrupt request
enable bit
IR:
Pulse width
bit4 measurement
completion/edge
detection flag
This bit enables or stops timer operation.
Writing "1" : allows timer operation to start from count value "00
• Set this bit to "1" after setting the count clock select bits (T00CR0/T01CR0:C2, C1, C0), timer
operation select bits (T00CR0/T01CR0:F3, F2, F1, F0), timer output initial value bit (T00CR1/
T01CR1:SO), 16-bit mode enable bit (TMCR0:MD), and filter function select bits (TMCR0:FE11,
FE10, FE01, FE00).
Writing "0": stops the timer operation and sets the count value to "00
• When the PWM timer function (variable-cycle mode) has been selected (T00CR0/T01CR0: F3,
F2, F1, F0 = "0100 "), the STA bit can be used to enable or disable timer operation from within
B
either the T00CR1 (timer 00) or T01CR1 (timer 01) register. In this case, the STA bit in the other
register is set to the same value automatically.
• During 16-bit operation (TMCR0:MD = 1), use the STA bit in the T00CR1 (timer 00) register to
enable or disable timer operation. In this case, the STA bit in the other register is set to the same
value automatically.
This bit suspends or resumes timer operation.
• Writing "1" to this bit during timer operation suspends the timer operation.
• Writing "0" to the bit when timer operation has been enabled (T00CR1/T01CR1:STA = 1) resumes
the timer operation.
• When the PWM timer function (variable-cycle mode) has been selected (T00CR0/T01CR0: F3,
F2, F1, F0="0100 "), the HO bit can be used to suspend or resume timer operation from within
B
either the T00CR1 (timer 00) or T01CR1 (timer 01) register. In this case, the HO bit in the other
register is set to the same value automatically.
• During 16-bit operation (TMCR0:MD = 1), use the HO bit in the T00CR1 (timer 00) register to
suspend or resume timer operation. In this case, the STA bit in the other register is set to the same
value automatically.
This bit enables or disables the output of interrupt requests.
Writing "1" : outputs an interrupt request when the pulse width measurement completion/edge
detection flag (T00CR1/T01CR1:IR) or timer reload/overflow flag (T00CR1/T01CR1:IF) is "1".
Note, however, that an interrupt request from the timer reload/overflow flag (T00CR1/T01CR1:IF)
is not outputted unless the IF flag interrupt enable (T00CR0/T01CR0:IFE) bit is also set to "1".
Writing "0" : disables interrupt request.
This bit shows the completion of pulse width measurement or the detection of an edge.
• The bit is set to "1" upon completion of pulse width measurement when the PWC timer function
has been selected.
• The bit is set to "1" upon detection of an edge when the input capture function has been selected.
• The bit is "0" when any timer function other than the PWC timer and input capture functions has
been selected.
• This bit always returns "1" to a read modify write instruction.
• The IR bit in T01CR1 (timer 01) register is set to "0" during 16-bit operation.
• Writing "0" to the bit sets it to "0".
• An attempt to write "1" to the bit is ignored.
CHAPTER 16 8/16-BIT COMPOSITE TIMER
Function
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