Clock Generating Circuit; Fig. 2.16.1 Clock Generating Circuit Block Diagram - Renesas 7200 Series User Manual

FUNCTIONAL DESCRIPTION

2.16 Clock generating circuit

2.16 Clock generating circuit
Oscillation circuit consists of an "oscillation gate" which operates as an amplifier to provide the gain required
for oscillation and an "oscillating control flip-flop" to control this. Because of that, it is possible to start and
stop oscillating as required. For details concerning start and stop of oscillation, refer to "2.14 Low-power
dissipation mode." Figure 2.16.1 shows the clock generating circuit block diagram.
Interrupt request
Interrupt disable
.
Selection gate :
Connected to black
side at reset.
X
IN
T34M : Timer 34 mode register

Fig. 2.16.1 Clock generating circuit block diagram

2-100
flag I
Reset
STP instruction
1/8
1/2
X
OUT
7220 Group User's Manual
S
S Q
WIT
R
instruction
R
T34M0
T34M2
Q Q S
R
STP
instruction
Internal clock φ
Timer 3 Timer 4
Reset