Datasheet

Section 11 Timer V
Rev. 2.00 Sep. 23, 2005 Page 135 of 444
REJ09B0068-0200
11.2 Input/Output Pins
Table 11.1 shows the timer V pin configuration.
Table 11.1 Pin Configuration
Name Abbreviation I/O Function
Timer V output TMOV Output Timer V waveform output
Timer V clock input TMCIV Input Clock input to TCNTV
Timer V reset input TMRIV Input External input to reset TCNTV
Trigger input TRGV Input Trigger input to initiate counting
11.3 Register Descriptions
The 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)
11.3.1 Timer Counter V (TCNTV)
TCNTV is an 8-bit up-counter. The clock source is selected by the CKS2 to CKS0 bits in 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 the
CCLR1 and CCLR0 bits in TCRV0. When TCNTV overflows, the OVF flag in TCSRV is set to
1. TCNTV is initialized to H'00.