Section 12 Timer V
12.2
Input/Output Pins
Table 12.1 shows the timer V pin configuration.
Table 12.1 Pin Configuration
Name
Abbreviation I/O
Function
Timer V output
Timer V clock input
Timer V reset input
Trigger input
TMOV
TMCIV
TMRIV
TRGV
Output
Input
Input
Input
Timer V waveform output
Clock input to TCNTV
External input to reset TCNTV
Trigger input to initiate counting
12.3
Register Descriptions
Time V has the following registers.
•
•
•
•
•
•
Timer counter V (TCNTV)
Timer constant register A (TCORA)
Timer constant register B (TCORB)
Timer control register V0 (TCRV0)
Timer control/status register V (TCSRV)
Timer control register V1 (TCRV1)
12.3.1
Timer Counter V (TCNTV)
TCNTV is an 8-bit up-counter. The clock source is selected by bits CKS2 to CKS0 in timer
control register V0 (TCRV0). The TCNTV value can be read and written by the CPU at any time.
TCNTV can be cleared by an external reset input signal, or by compare match A or B. The
clearing signal is selected by bits CCLR1 and CCLR0 in TCRV0.
When TCNTV overflows, OVF is set to 1 in timer control/status register V (TCSRV).
TCNTV is initialized to H'00.
Rev. 3.00 Sep. 10, 2007 Page 187 of 528
REJ09B0216-0300
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