Sout Interrupt Function; Operation Example Of Sout Function - Epson RA8804 CE Applications Manual

RA8804 CE

8.5. SOUT Interrupt Function

Controller can select and use interrupt of a voltage drop or other detection of RTC, as a hardware interruption, and
controller can use SOUT like as GPO port.

8.5.1. Operation example of SOUT function.

V
DD
VDET flag
SOUT
Hi-Z
(Ex.1) When a VDD voltage fell, SOUT outputs active LOW signal.
Command : example
STEP
(Address, Data)
1 WriteRA8804(0x19, 0x00)
2 WriteRA8804(0x0E, 0x3A)
3 WriteRA8804(0x1A, 0xC0)
4 WriteRA8804(0x19, 0x69)
5
6 WriteRA8804(0x0E, 0x3A)
7 WriteRA8804(0x19, 0x00)
(Ex.2) SOUT use like a GPO port.
Command : example
STEP
(Address, Data)
8 WriteRA8804(0x19, 0x00)
9 WriteRA8804(0x1A, 0x80)
A WriteRA8804(0x19, 0x69)
B WriteRA8804(0x1A, 0XC0)
C WriteRA8804(0x1A, 0x80)
D WriteRA8804(0x1A, 0XC0)
E WriteRA8804(0x19, 0x00)
When system need avoid the Hi-Z output, install Pull-up or pull-down resistor to SOUT if necessary.
1.45V (Typ.)
1 2 3 4 5 6 (
Write
contents
SOUT is disabled
Clear VDET
Specified VDET and LOW active by SRV.
SOUT is enabled.
VDD fell and set VDET.
Clear VDET.
SOUT is disabled.
Write
contents
SOUT is disabled.
SOUT is outputs LOW by direct control.
SOUT is enabled.
SOUT is outputs HIGH by direct control.
SOUT is outputs LOW by direct control.
SOUT is outputs HIGH by direct control.
SOUT is disabled.
Hi-Z
) A B C
7,8,9
Supplement
(Not 0x69) SOUT is Hi-Z.
SOUT is HIGH.
SOUT outputs active LOW.
Supplement
(Not 0x69) SOUT is Hi-Z.
SOUT is LOW.
SOUT is HIGH.
SOUT is LOW.
SOUT is HIGH.
SOUT is Hi-Z.
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Hi-Z
D E
ETM60E-02