508
Chapter 11
16-bit Timer/Event Counter T
User’s Manual U16580EE3V1UD00
(2)
Capture function (TTnCCS1 = 1, TTnCCS0 = 1)
When TTnCTL0 register bit TTnCE is set to 1, the counter counts from 0000H to FFFFH. An
overflow interrupt (INTTTnOV) is output when the value of the counter changes from FFFFH to
0000H, and the counter is cleared. The count operation is performed in the free-running mode
until TTnCE = 0 is set. When, during count operation, the counter value is captured to the
TTnCCR0 and TTnCCR1 registers through detection of the valid edge of capture input (TITn1,
TITn0), a capture interrupt (INTTTnCC0, INTTTnCC1) is output.
Regarding capture in the vicinity of overflow (FFFFH), judgment is possible with the overflow flag
(TTnOVF). However, judgment with the TTnOVF flag is not possible when the capture trigger inter-
val is such that it includes two overflow occurrences (2 or more free-running cycles).
Cautions: 1. In free-running mode the external event clock input (TEVTTn) is prohibited
(TTnCTL1.TTnEEE = 0).
2. When an internal count clock
≤
f
XX
/16 (TTnCTL0.TTnCKS2-0) is selected in free-
running mode, the TTnCCR0 and TTnCCR1 registers are used as capture regis-
ters, the a value of FFFFH will be captured if a valid signal edge is input before the
first count up.
Figure 11-31:
Basic Operation Timing in Free-Running Mode (Capture Function)
(a) When TOTn0, TOTn1 are not output (TTnOE0, 1 = 0, TTnOL0, 1 = 0)
Remarks: 1.
D
00
, D
01
: Values captured to TTnCCR0 register (0000H to FFFFH)
D
10
, D
11
: Values captured to TTnCCR1 register (0000H to FFFFH)
2.
TITn0: Setting to rising edge detection (TTnIOC1 register bits TTnIS1, TTnIS0 = 01)
TITn1: Setting to falling edge detection (TTnIOC1 register bits TTnIS3, TTnIS2 = 10)
3.
n = 0, 1
D
11
D
10
0000H
D
12
Counter
FFFFH
TITn1
TITn0
TTnCE
TTnCCR1
D
00
D
01
D
12
D
02
D
11
D
10
D
00
D
01
TTnCCR0
D
02
D
03
0000H
D
03
Summary of Contents for MuPD70F3187
Page 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Page 16: ...16 User s Manual U16580EE3V1UD00 ...
Page 28: ...28 User s Manual U16580EE3V1UD00 ...
Page 32: ...32 User s Manual U16580EE3V1UD00 ...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Page 1052: ...1052 User s Manual U16580EE3V1UD00 ...
Page 1053: ......