NEC PD703114 User Manual page 314

(b) Up/down count operation in UDC mode
TM10 up/down count judgment in the UDC mode is determined based on the phase difference of the
TIUD10 and TCUD10 pin inputs according to the PRM10 register setting.
(i) Mode 1 (PRM10 register's PRM12 bit = 1, PRM11 bit = 0, PRM10 bit = 0)
In mode 1, the following count operations are performed based on the level of the TCUD10 pin upon
detection of the valid edge of the TIUD10 pin.
• TM10 down count operation when TCUD10 pin = high level
• TM10 up count operation when TCUD10 pin = low level
Figure 9-51. Mode 1 (When Rising Edge Is Specified as Valid Edge of TIUD10 Pin)
TIUD10
TCUD10
TM10
Figure 9-52. Mode 1 (When Rising Edge Is Specified as Valid Edge of TIUD10 Pin):
TIUD10
TCUD10
TM10
314
CHAPTER 9 TIMER/COUNTER FUNCTION
0007H 0006H 0005H
Down count
In Case of Simultaneous TCUD10, TCUD10 Pin Edge Timing
0007H 0006H 0005H
Down count
User's Manual U15195EJ5V0UD
0004H 0005H 0006H
Up count
0004H 0005H 0006H
Up count
0007H
0007H