Panasonic MN103S User Manual page 232

Chapter 8
8-bit Timer
Cascade Connection Operation (When using timers as a 32-bit timer)
Table:8.7.3 shows timer functions at 32-bit timer cascade connection.
Table:8.7.3 Cascade Connection Operation (When using timers as a 32-bit timer)
32-bit timer
Interrupt source
Interval timer
TImer output
Event counter
Cascade connection set-
ting register
Count clock source set-
ting register
Count value setting regis-
ter
Count Timing of Cascade Connection
Figure:8.7.1 shows timing when cascaded timer 1 and timer 0 count down as a 16-bit timer.
Count clock
Timer 0
base register
Timer 0
binary counter
Interrupt request
TMIRQ0
Timer 1
base register
Timer 1
binary counter
Interrupt request
TMIRQ1
VIII - 42 Cascade Connection
Timer 3 + timer 2 + timer 1 Timer 7 + timer 6 + timer 5
+ timer 0 + timer 4
TM3IRQ TM7IRQ
O O
Timer 3 Timer 7
Timer 0 Timer 4
TM3MD TM7MD
TM2MD TM6MD
TM1MD TM5MD
TM0MD TM4MD
TM3BR+TM2BR+TM1BR TM7BR+TM6BR+TM5BR
+TM0BR +TM4BR
01 00 FF FE
01
Figure:8.7.1 Count Timing of Cascade Connection
Timer 17 + timer 16 + timer 15
+ timer 14
TM17IRQ
O
Timer 17
Timer 14
TM17MD
TM16MD
TM15MD
TM14MD
TM17BR+TM16BR+TM15BR
+TM14BR
01 00 N N-1
00
N
01 00 FF FE FD
M
M M-1