Use Methods; Description Of Registers; Write / Read And Bank Select; Register Table (Basic Time And Calendar Register) - Epson RA8900SA/CE Applications Manual

RA8900 SA / CE

8. Use Methods

8.1. Description of Registers

8.1.1. Write / Read and Bank Select

Address 00h to 0Fh : Basic time and calendar register
Address 10h to 1Fh : Extension register

8.1.2. Register table (Basic time and calendar register)

Address Function
00 SEC
01 MIN
02 HOUR
03 WEEK
04 DAY
05 MONTH
06 YEAR
07 RAM
08 MIN Alarm
09 HOUR Alarm
WEEK Alarm
0A
DAY Alarm
0B Timer Counter 0
0C Timer Counter 1
0D Extension Register
0E Flag Register
0F Control Register
Note
When after the initial power-up (from 0V) or when the result of read out the VLF bit is "1" , initialize all registers,
before using the module.
Be sure to avoid entering incorrect date and time data, as clock operations are not guaranteed when the data or
time data is incorrect.
1)
During the initial power-up, the TEST bit is reset to "0" and the VLF bit is set to "1".
 At this point, all other register values are undefined, so be sure to perform a reset before using the module.
2)
Only a "0" can be written to the UF, TF, AF, VLF, or VDET bit.
3)
Any bit marked with "
4)
Any bit marked with "" is a RAM bit that can be used to read or write any data.
5)
The TEST bit is used by the manufacturer for testing. Be sure to set "0" for this bit when writing.
.
bit 7 bit 6
40

40

 
6

 
 
80 40
 
AE 40

AE
6
AE

128 64
 
TEST WADA USEL
 
CSEL1 CSEL0
" should be used with a value of "0" after initialization.

... C
ompatible with RX-8803.
bit 5 bit 4 bit 3 bit 2
20 10 8 4
20 10 8 4
20 10 8 4
5 4 3 2
20 10 8 4
10 8 4

20 10 8 4
   
20 10 8 4
20 10 8 4
5 4 3 2
20 10 8 4
32 16 8 4
 
2048 1024
TE FSEL1 FSEL0 TSEL1 TSEL0
UF TF AF

UIE TIE AIE

Page - 6
bit 1 bit 0 Read Write
P
2 1
P
2 1
P
2 1
P
1 0
P
2 1
P
2 1
P
2 1
  P
P
2 1
P
2 1
1 0
P
2 1
P
2 1
P
512 256
P
P
VLF VDET
P
RESET

P : Possible , I : Impossible
ETM44E-01
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P