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Epson RX8111CE User Manual
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RX8111CE
Page
−
40
ETM
6
1E-
01
8) Battery
Backu
p Sw
i
tcho
v
er re
lated reg
i
s
t
er
SWSEL
1, S
W
SEL0 b
it
If use
r
d
o
n
ot use
sw
itchove
r function
(INIEN
=
0)
,
t
he
se two
reg
i
sters
can fix M
O
S
SW se
tting.
Table
48
Battery
Backup S
witchover SW r
egister
INIEN
S
W
SEL1
S
W
SEL0
S
W
3
S
W
2
S
W
1
I
2
C Bu
s
Re
m
arks
0
0
1
ON
OFF
OFF
OFF
De
faul
t
1
0
OFF
OFF
ON
OFF
0
0
ON
OFF
OFF
OFF
1
1
1
Prohibi
t
e
d
Othe
r
th
an (1,1)
Auto
m
at
i
c
control
ON
9) Voltag
e detection
i
nter
mi
t
tent timing
Table
49
Voltage
detection ti
ming
Powe
r
Supply
Nor
m
al
mode
Backup
m
o
de
V
DD
drive
（
CHGEN
=1,
INIEN=1
）
V
DD
drive
（
CHGEN
=0,
INIEN=1
）
V
DD
drive
（
CHGEN
=0,
INIEN=0
）
V
BAT
dr
i
ve
V
DD
de
tection
V
DET1
anyti
m
e
anyti
m
e
suspe
nded
Once
a
31
.25
ms
V
DD
vs V
B
A
T
V
CMP
T
wice
a
3.0
s
suspe
nded
suspe
nded
Suspe
nded
V
BA
T
dete
ction
V
LOW
Once
a
3.
0
s
once
a
3
.
0
s
once
a
3
.
0
s
Once
a
3.
0
s
V
LO
W
If resul
t
s (co
ntinuou
s 2 times
)
ar
e
same
,
t
ha
t is ref
l
e
cte
d t
o V
LO
W
.
43
45
Table of Contents
Default Chapter
4
Table of Contents
4
1 Overview
6
2 Block Diagram
6
3 Terminal Description
7
Terminal Connections
7
Pin Functions
7
4 Connection Example
8
Battery Switchover Connection Examples
8
5 External Dimensions / Marking Layout
10
External Dimensions
10
Marking Layout
10
6 Absolute Maximum Ratings
11
7 Recommended Operating Conditions
11
8 Frequency Characteristics
11
9 Electrical Characteristics
12
DC Characteristics
12
DC Characteristics 1
12
Chargeable Current Characteristics
13
Reference Value of Switching Element
13
AC Characteristics
14
AC Characteristics 1
14
AC Characteristics 2
14
10 Power Supply Sequence
15
The Behavior and Operation Restriction at Power-ON in RTC
16
Reset by Software
17
11 Reference Information
17
Reference Data
17
12 Application Notes
18
13 Overview of Functions and Description of Registers
19
Overview of Functions
19
Register Table
20
Description of Registers
24
Clock and Calendar Counter (10H 16H)
24
Wake-Up Timer (down Counter) (1Ah 1Ch, 2Dh)
24
Alarm Registers (17H 19H)
24
Function-Related Register (1Dh 1Fh)
24
Battery Backup Switchover Function Related Register (32H)
25
Time Stamp Register
25
Operation Status Detection Register (33H)
25
User Register (40H 7Fh)
25
14 How to Use
26
Clock Calendar Function
26
Clock Counter
26
Week Counter
27
Calendar Counter
27
Wake-Up Timer Interrupt Function
28
Related Registers for Function of Wake-Up Timer Interrupt Function
28
Wake-Up Timer Start Timing
30
Wake-Up Timer Interrupt Interval
31
Diagram of Wake-Up Timer Interrupt Function
31
Alarm Interrupt Function
33
Related Registers for Alarm Interrupt Functions
33
Examples of Alarm Settings
34
Diagram of Alarm Interrupt Function
35
Time Update Interrupt Function
36
Related Registers for Time Update Interrupt Functions
36
Time Update Interrupt Function Diagram
37
RTC Self Monitoring Detection
38
Related Registers for RTC Internal Status Detection
38
FOUT Function (Clock Output Function)
39
FOUT Control Register
39
FOUT Function Table
39
Battery Backup Switchover Function
40
Description of Battery Backup Switchover Function
40
Battery Backup Switchover Related Register
40
Time Stamp Function
45
Outline of Time Stamp Function
45
Time Stamp Related Register
45
Time Stamp Function Triggered by EVIN Pin Input
46
Time Stamp Function Triggered by I
48
Access
48
Time Stamp Stored Register
49
RTC Internal Event Triggered Time Stamp, Multiple Times Stamp
50
Flow Chart
54
Reading/Writing Data Via the I 2 C-Bus Interface
61
Overview of I C-Bus
61
Data Transfers
61
Starting and Stopping I 2 C-Bus Communications
61
Slave Address
62
System Configuration
62
I 2 C-Bus Protocol
63
15 Circuit Diagram Connection
64
16 Tables
65
17 Figures
66
5
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Epson RX8111CE Specifications
General
Brand
Epson
Model
RX8111CE
Category
Control Unit
Language
English
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