![](http://datasheet.mmic.net.cn/90000/M306H2MC-XXXFP_datasheet_3496122/M306H2MC-XXXFP_84.png)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
MITSUBISHI MICROCOMPUTERS
81
Rev. 1.0
M306H2MC-XXXFP
Timer Ai mode register
(When not using two-phase pulse signal processing)
Symbol
Address
When reset
TAiMR(i = 2 to 4) 039816 to 039A16
0016
b7
b6
b5
b4
b3
b2
b1
b0
01
0
Note 1: This bit is valid for timer A3 mode register. Timer A2 is fixed to normal processing
operation, and timer A4 is fixed to multiply-by-4 processing operation.
Note 2: When performing two-phase pulse signal processing, make sure the two-phase pulse
signal processing operation select bit (address 038416) is set to “1”. Also, always be
sure to set the event/trigger select bit (address 038316) to “00”.
Note 3: In the case of using “Event counter mode” as “Free-Run type”, the timer register
contents may be unkown when counting begins.(Refer 3.
Usage Precaution.)
Timer Ai mode register
(When using two-phase pulse signal processing)
Symbol
Address
When reset
TAiMR(i = 2 to 4) 039816 to 039A16
0016
b7
b6
b5
b4
b3
b2
b1
b0
Operation mode select bit
0 1 : Event counter mode
b1 b0
TMOD1
TMOD0
MR0
0 (Must always be “0” when using two-phase pulse signal
processing)
0 (Must always be “0” when using two-phase pulse signal
processing)
MR2
MR1
MR3
0 (Must always be “0” when using two-phase pulse signal
processing)
TCK1
TCK0
01
0
1 (Must always be “1” when using two-phase pulse signal
processing)
Bit symbol
Bit name
Function
W
R
Count operation type
select bit
Two-phase pulse
processing operation
select bit (Note 1)(Note 2)
0 : Reload type
1 : Free-run type(Note 3)
0 : Normal processing operation
1 : Multiply-by-4 processing operation
0
1
Note 1: In event counter mode, the count source is selected by the event / trigger select bit
(addresses 038216 and 038316).
Note 2: The settings of the corresponding port register and port direction register are invalid.
Note 3: Valid only when counting an external signal.
Note 4: When an “L” signal is input to the TAi OUT pin, the downcount is activated. When “H”,
the upcount is activated. Set the corresponding port direction register to “0”.
Note 5: In the case of using “Event counter mode” as “Free-Run type”, the timer register
contents may be unkown when counting begins.(Refer 3. Usage Precaution.)
W
R
Operation mode select bit
0 1 : Event counter mode (Note 1)
b1 b0
TMOD0
MR0
Pulse output function
select bit
0 : Pulse is not output
(TA iOUT pin is a normal port pin)
1 : Pulse is output (Note 2)
(TA iOUT pin is a pulse output pin)
Count polarity
select bit (Note 3)
MR2
MR1
MR3
0 (Must always be fixed to “0” in event counter mode)
TCK0
Count operation type
select bit
0 : Counts external signal's falling edge
1 : Counts external signal's rising edge
Up/down switching
cause select bit
0 : Up/down flag's content
1 : TA iOUT pin's input signal (Note 4)
0 : Reload type
1 : Free-run type(Note 5)
Bit symbol
Bit name
Function
RW
TCK1
Invalid in event counter mode
Can be “0” or “1”
TMOD1
Figure 2.10.9 Timer Ai mode register in event counter mode