Fujitsu MB90895 Series Hardware Manual page 268

CHAPTER 8 16-bit reload timer
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Details of Pins in Block Diagram
There are two channels for 16-bit reload timer.
The actual pin names, outputs to resources, and interrupt request numbers for each channel are as follows:
16-bit reload timer 0:
TIN pin: P20/TIN0
TOT pin: P21/TOT0
Interrupt request number: #17 (11
16-bit reload timer 1:
TIN pin: P22/TIN1
TOT pin: P23/TOT1
Output to resources: Clock input source of UART1 and start trigger of A/D converter
Interrupt request number: #36 (24
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Count clock generator
The count clock generator generates a count clock supplied to the 16-bit timer register (TMR) on the basis
of the machine clock or external event clock.
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Reload controller
When the 16-bit reload timer starts operation or the TMR underflows, the reload controller reloads the
value set in the 16-bit reload register (TMRLR) to the TMR.
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Output controller
The output controller inverts and enables or disables the output of the TOT pin at underflow.
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Operation controller
The operation controller starts or stops the 16-bit reload timer.
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16-bit timer register (TMR)
The 16-bit timer register (TMR) is a 16-bit down counter.At read, the value being counted is read.
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16-bit reload register (TMRLR)
The 16-bit reload register (TMRLR) sets the interval time of the 16-bit reload timer.When the 16-bit reload
timer starts operation or the TMR underflows, the reload controller reloads the value set in the 16-bit reload
register (TMRLR) to the TMR.
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