Timers; Fig. 2.6.1 Timer 1, Timer 2, Timer 3, And Timer 4 Block Diagram - Renesas 7200 Series User Manual

FUNCTIONAL DESCRIPTION

2.6 Timers

2.6 Timers
M37221M6-XXXSP/FP has four 8-bit timers with reload latch. Figure 2.6.1 shows the timer block diagram.
X
IN
P2 /TIM2
4
(Note 3)
H
SYNC
P2 /TIM3
3
(Note 3)
Selection gate :
Connected to black
side at reset
T12M : Timer 12 mode register
T34M : Timer 34 mode register
Notes 1: HIGH pulse width of external clock inputs TIM2 and TIM3 needs 4 machine cycles or more.
2: When the external clock source is selected, timers 2 and 3 are counted at a rising edge of input signal.
3: In the stop mode or the wait mode, external clock inputs TIM2 and TIM3 cannot be used.

Fig. 2.6.1 Timer 1, timer 2, timer 3, and timer 4 block diagram

2-34
1/4096
1/2 1/8
T12M0
T12M4
T34M0
T34M4
7220 Group User's Manual
Timer 1 latch (8)
8
Timer 1 (8)
T12M2
Timer 2 latch (8)
8
Timer 2 (8)
T12M1
T12M3
T34M5
Timer 3 latch (8)
8
Timer 3 (8)
T34M2
T34M1
Timer 4 latch (8)
8
Timer 4 (8)
T34M3
Data bus
8
Timer 1
interrupt request
8
8
Timer 2
interrupt request
8
8
Reset
STP
FF
16
instruction
Timer 3
interrupt request
8
8
07
16
Timer 4
interrupt request
8