Datasheet

Section 9 16-Bit Timer Pulse Unit (TPU)
Rev.7.00 Feb. 14, 2007 page 336 of 1108
REJ09B0089-0700
Bit 0—Input Capture/Output Compare Flag A (TGFA): Status flag that indicates the
occurrence of TGRA input capture or compare match.
Bit 0
TGFA Description
0 [Clearing conditions] (Initial value)
• When DTC is activated by TGIA interrupt while DISEL bit of MRB in DTC is 0
• When 0 is written to TGFA after reading TGFA = 1
1 [Setting conditions]
• When TCNT = TGRA while TGRA is functioning as output compare register
• When TCNT value is transferred to TGRA by input capture signal while TGRA is
functioning as input capture register
9.2.6 Timer Counters (TCNT)
Channel 0: TCNT0 (up-counter)
Channel 1: TCNT1 (up/down-counter
*
)
Channel 2: TCNT2 (up/down-counter
*
)
Channel 3: TCNT3 (up-counter)
Channel 4: TCNT4 (up/down-counter
*
)
Channel 5: TCNT5 (up/down-counter
*
)
Bit : 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Initial value : 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Note: * These counters can be used as up/down-counters only in phase counting mode or when
counting overflow/underflow on another channel. In other cases they function as up-
counters.
The TCNT registers are 16-bit counters. The TPU has six TCNT counters, one for each channel.
The TCNT counters are initialized to H'0000 by a reset and in hardware standby mode.
The TCNT counters cannot be accessed in 8-bit units; they must always be accessed as a 16-bit
unit.