tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 164

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

13.4 Timer Function
13. 16-bit Timer Counter (TCA)
RA001
TA0CR<TA0S>
TA0MOD<TA0DBE>
Source clock
Counter
Write to TA0DRAL
Write to TA0DRAH
Temporary buffer
(8 bits)
TA0DRAL
TA0DRAH
INTTCA interrupt request
TA0CR<TA0S>
TA0MOD<TA0DBE>
Source clock
Counter
Write to TA0DRAL
Write to TA0DRAH
Temporary buffer
(8 bits)
Double buffer
(16 bits)
TA0DRAL
TA0DRAH
INTTCA interrupt request
Write n
Write n
n
n
Write m
Write m
mn
m
m
n
n
Reflected by writing to TA0DRAH
Reflected at the same time as data
is written into TA0DRAH while
the timer is stopped
Figure 13-2 Timer Mode Timing Chart
0
0
Timer start
Timer start
1
1
When the double buffer is disabled (TA0MOD<TA0DBE>=”0”)
When the double buffer is enabled (TA0MOD<TA0DBE>=”1”)
2
2
3
3
Match detection
Match detection
4
4
Page 150
mn-1
mn-1
mn
mn
0
0
Counter clear
Counter clear
1
1
2
2
Match detection
Write s
Write s
s
s
3
3
Match detection
Write r
Write r
rs
s
r
Reflected by writing to TA0DRAH
mn-1
rs-1
mn
rs
0
0
Reflected by
an interrupt
Counter clear
s
r
1
1
Match detection
Counter clear
2
Timer stop
0
rs-1
TMP89FM42
rs
0
1