Timer Control 1 Register (T1Cr); Figure 7.4-2 Timer 1 Control Register (T1Cr) - Fujitsu F2MC-8L Series Hardware Manual

CHAPTER 7 8/16-BIT TIMER/COUNTER
7.4.1

Timer Control 1 Register (T1CR)

The timer 1 control register (T1CR) is used to select each function of timer 1 in 8-bit
mode or of the 16-bit timer, enable or disable operation, control interrupts, and check
the state of the 8/16-bit timer/counter. Even to use only timer 1 in 8-bit mode, the timer
2 control register (T2CR) must be initialized.
Timer 1 Control Register (T1CR)
Address
0019
H
R/W : Readable and writable
X : Indeterminate
: Initial value
* : Square wave output pin assumes the level
corresponding to the data values set when
T1STR is "0."
166

Figure 7.4-2 Timer 1 Control Register (T1CR)

Bit 7 Bit 6 Bit 5 Bit 4
T1IF T1IE T1OS1 T1OS0 T1CS1 T1CS0 T1STP T1STR
R/W R/W R/W R/W
Bit 3 Bit 2 Bit 1 Bit 0
R/W R/W R/W R/W
Timer counter start bit
T1STR
0 Timer sops counter operation.
1 Clears and starts counter operation.
T1STP
Continues counter operation without clearing the
0
counter.
1 Pauses counter operation.
Count clock select bits
T1CS1 T1CS0
0 0 2 t
inst
0 1 32 t
inst
1 0 512 t
inst
1 1 External clock
t : Instruction cycle
inst
Square wave output control bits
T1OS1 T1OS0
Use the P34/TO/INT0 pin as general-purpose
0 0
port pin (P34).
Sets data for setting output wave output at the
0 1
L level.
Sets data for setting to set output wave
1 0
output at the H level.
Outputs the level corresponding to the set
1 1
data to the square wave output pin (TO).*
Interrupt request enable bit
T1IE
0 Disables interrupt request output.
1 Enables interrupt request output.
Interrupt request flag bit
T1IF
Read
No match with counter
0
value
1 Match with counter value
Initial value
X000XXX0
B
Timer stop bit
Write
Clears this bit.
No effect. The bit does
not change.