R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 41

• Manufacturer Part Number: R5F21133DFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY/R8C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

R8C/13 Group
Rev.1.20
REJ09B0111-0120
Figure 6.1 Clock Generation Circuit
Hardware reset2
P o w e r o n r e s e t
Jan 27, 2006
R E S E T
I n t e r r u p t r e q u e s t l e v e l
j u d g m e n t o u t p u t
V o l t a g e d e t e c t i v e
i n t e r r u p t
C M 0 2 , C M 0 5 , C M 0 6 : B i t s i n C M 0 r e g i s t e r
C M 1 0 , C M 1 3 , C M 1 4 , C M 1 6 , C M 1 7 : B i t s i n C M 1 r e g i s t e r
O C D 0 , O C D 1 , O C D 2 : B i t s i n O C D r e g i s t e r
H R 0 0 , H R 0 1 : B i t s i n H R 0 r e g i s t e r
Oscillation stop detection circuit
M a i n c l o c k
C M 1 0 = 1 ( S t o p m o d e )
N O T E S :
1 . S e t t h e s a m e v a l u e t o t h e O C D 1 b i t a n d O C D 0 b i t .
page 30 of 205
WAIT instruction
Pulse generation
circuit for clock
edge detection
and charge,
discharge control
circuit
S
S
R
R
R
F o r c i b l e d i s c h a r g e w h e n O C D 0
Q
Q
High-speed on-chip oscillator control register 1 (7-bit)
Charge,
discharge
circuit
C M 1 4
CM05
H R 0 0
F r e q u e n c y a d j u s t a b l e
X
OCD1
I N
CM02
(1)
a
High-speed
on-chip
oscillator
L o w - s p e e d
o n - c h i p
o s c i l l a t o r
CM13
Main
clock
CM06=0
CM17 to CM16=00
H R 0 1 = 1
H R 0 1 = 0
(1 )
X
Oscillation stop
detection interrupt
generation circuit
= 0
OUT
1/2
Voltage
detection
circuit
O s c i l l a t i o n
s t o p
d e t e c t i o n
f R I N G - S
Watchdog
timer
interrupt
e
O C D 2 = 0
O C D 2 = 1
CM06=0
CM17 to CM16=01
On-chip
oscillator
clock
O C D 2 b i t s w i t c h s i g n a l
C M 1 4 b i t s w i t c h s i g n a l
2
1/2
CM06=0
CM17 to CM16=10
2
1/2
a
e
1/128
Divider
b
b
2
O s c i l l a t i o n s t o p
d e t e c t i o n ,
W a t c h d o g t i m e r ,
V o l t a g e
d e t e c t i o n
i n t e r r u p t
f
CM06=1
f
A D
c
1
d
1/2
f
f
6. Clock Generating Circuit
3 2
8
f
R I N G - f a s t
f
f
f
R I N G
2
f
R I N G 1 2 8
1 S I O
Details of divider
f
f
8 S I O
32SIO
CM06=0
CM17 to CM16=11
1/2
P e r i p h e r a l
f u n c t i o n c l o c k
CPU clock
c
c
d
2