Structure Of 8/16-Bit Timer/Counter; Figure 7.2-1 Block Diagram Of 8/16-Bit Timer/Counter - Fujitsu F2MC-8L Series Hardware Manual

7.2

Structure of 8/16-bit Timer/Counter

The 8/16-bit timer/counter consists of the following five blocks:
• Count clock selectors 1 and 2
• Counter circuits 1 and 2
• Square wave output controller
• Timer data registers (T1DR and T2DR)
• Timer control registers (T1CR and T2CR)
Block Diagram of 8/16-bit Timer/Counter
Timer control register
(T1CR)
2
1 t
inst
32
512
Pin
P33/EC/SCO Count clock
selector 1
Count clock
selector 2
2
1 t
inst
32
512
Timer control register
(T2CR)
t Instruction cycle
inst :

Figure 7.2-1 Block Diagram of 8/16-bit Timer/Counter

T1STR T1STP T1CS0 T1CS1 T1OS0 T1OS1 T1IE
2
Square wave
output controller
2
T2STR T2STP T2CS0 T2CS1 T2OS0 T2OS1 T2IE
7.2 Structure of 8/16-bit Timer/Counter
T1IF
Pin control/output
initialization
2
Counter circuit 1
CK
8-bit counter
CO
CLR
Read T1DR
Comparater
EQ
Comparate data latch
LOAD
Timer data register (T1DR)
Write T1DR, T2DR
Timer data register (T2DR)
Comparate data latch
LOAD
Comparater
EQ
Read T2DR
CK
8-bit counter
CLR
Counter circuit 2
T2IF
Output enable
signal
R, S
Q
CK
P34/TO/INT0
T.FF
TO1
Interrupt
request
IRQ3
Pin
161