NEC uPD78P078 - Manual (Page 205)

205
CHAPTER 8 16-BIT TIMER/EVENT COUNTER
Figure 8-18. Configuration Diagram for Pulse Width Measurement by Free-Running Counter
Figure 8-19. Timing of Pulse Width Measurement Operation by Free-Running Counter
and One Capture Register (with Both Edges Specified)
Count Clock
TM0 Count Value
TI00 Pin Input
CR01 Captured Value
INTP0
OVF0
0000 0001 D0 D1 FFFF 0000 D2 D3
D0 D1 D2 D3
(D1 – D0) x t (10000H – D1 + D2) x t (D3 – D2) x t
t
Selector
f XX /2 2
f XX /2
f XX
2f XX
INTTM3
16-Bit Timer Register (TM0)
16-Bit Capture/Compare
Register 01 (CR01)
OVF0
INTP0
Internal Bus
TI00/P00/INTP00