LAPIS Semiconductor ML610472, User Manual

Page: 131 / 281

ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 9 Timer
9-17
9.4.2 Operating Timer 3 (8-Bit Timer Mode) by External Clock (P45/T3CK)
Set the P45MD1 bit (P4MOD1 register's bit 5) to "0" and the P45MD0 bit (P4MOD0 register's bit 5) to "0" for
specifying the P45 to the 1st function.
Register
name
P4MOD1 register (Address: 0F225H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47MD1 P46MD1 P45MD1 P44MD1 P43MD1 P42MD1 - -
Setting
value
* * 0 * * * - -
Register
name
P4MOD0 register (Address: 0F224H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47MD0 P46MD0 P45MD0 P44MD0 P43MD0 P42MD0 - -
Setting
value
* * 0 * * * - -
Set the the P45DIR bit (P4DIR register's bit 5) to "1" for specifying the state mode of the P45 pin to input.
Register
name
P4DIR register (Address: 0F221H)
Bit 7 6 5 4 3 2 1 0
Bit name
P47DIR P46DIR P45DIR P44DIR P43DIR P42DIR - -
Setting
value
* * 1 * * * - -
Select the external clock(P45/T3CK) and timer3 (8-bit mode) in the TM3CON0 register, and input the operation clock
for the Timer 3 from the P45 pin.