Operating Description Of Interval Timer Function (Continuous Mode) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 16 8/16-BIT COMPOSITE TIMER
16.8 Operating Description of Interval Timer Function
(Continuous Mode)
This section describes the interval timer function (continuous mode operation) of
the 8/16-bit composite timer.
Operation of Interval Timer Function (Continuous Mode)
The composite timer requires the register settings shown in Figure 16.8-1 to serve as the interval timer
function (continuous mode).
T00/01CR0
T00/01CR1
TMCR
T00/01DR
In interval timer function (continuous mode), enabling timer operation (T00CR0/T00CR1:STA = 1) causes
the counter to start counting from "00
counter value matches the value in the 8/16-bit composite timer 00/01 data register (T00DR/T01DR), the
timer output bit (TMCR0:TO0/TO1) is inverted, the interrupt flag (T00CR1/T01CR1:IF) is set to "1", and
the counter continues to count by restarting at "00
continuous operation.
The value of the 8/16-bit composite timer 00/01 data register (T00DR/T01DR) is transferred to the
temporary storage latch (comparison data storage latch) in the comparator either when the counter starts
counting or when a counter value comparison match is detected. Writing "00
timer 00/01 data register is disabled during the count operation.
When the timer stops operation, the timer output bit (TMCR0:TO0/TO1) holds the last value.
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Figure 16.8-1 Settings for Counter Function (8-bit Mode)
bit7 bit6 bit5
IFE C2 C1
STA HO IE
1
TO1 TO0 IIS
×
Sets interval time (counter compare value)
: Used bit
×: Unused bit
1: Set "1"
0: Set "0"
bit4 bit3 bit2
C0 F3
0
IR BF
× ×
MOD FE11 FE10
" at the rising edge of a selected count clock signal. When the
H
". The timer outputs a square wave as a result of this
H
bit1 bit0
F2 F1 F0
0 0 1
IF SO OE
FE01 FE00
" to the 8/16-bit composite
H