R5F21133DFP RENESAS [Renesas Technology Corp], R5F21133DFP Datasheet - Page 39

• 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
Table 5.3 Voltage Detection Interrupt Request Generation Conditions to get out of Stop mode
N O T E S :
S t o p m o d e
1 . T h e s t a t u s e x c e p t t h e w a i t m o d e a n d s t o p m o d e i s h a n d l e d a s t h e n o r m a l m o d e . ( R e f e r t o C h a p t e r 6 , " C l o c k
2 . R e f e r t o F i g u r e 5 . 1 4 , " O p e r a t i o n E x a m p l e o f 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 G e n e r a t i o n C i r c u i t " f o r i n t e r r u p t g e n e r a t i o n
O p e r a t i o n m o d e
5.4.2 Exiting Stop Mode on a Voltage Detection Interrupt
A voltage detection interrupt is generated when the input voltage at the V
or drops below Vdet if all of the following conditions hold true in stop mode.
The voltage detection interrupt shares the interrupt vector with the watchdog timer interrupt and oscil-
lation stop detection interrupt.
The D42 bit in the D4INT register becomes “1” when passing through Vdet is detected after the volt-
age inputted to the V
A voltage detection interrupt request is generated when the D42 bit changes state from “0” to “1”. The
D42 bit needs to be set to “0” in a program.
Table 5.3 lists the voltage detection interrupt request generation conditions to get out of stop mode.
G e n e r a t i o n C i r c u i t . " )
t i m i n g .
Jan 27, 2006
• The VC27 bit in the VCR2 register is set to “1” (voltage detection circuit enabled)
• The D40 bit in the D4INT register is set to “1” (voltage detection interrupt enabled)
• The D41 bit in the D4INT register is set “1” (digital filter disabled mode)
• The D46 bit in the D4INT register is set “0” (voltage detection interrupt selected)
V C 2 7 b i t
1
page 28 of 205
CC
D 4 0 b i t
1
pin is up or down.
D 4 1 b i t
1
D 4 2 b i t
0
D 4 6 b i t
0
D 4 7 b i t
0 o r 1
From 0 to 1
From 1 to 0
V C 1 3 b i t
CC
5.4 Voltage Detection Circuit
pin rises to Vdet or more