12.7 Special Register List
12
- 79
12
TROUBLESHOOTING
9
EM
C AN
D
LO
W
VOL
TA
G
E
DI
RE
C
T
IVES
10
LO
ADING A
N
D
INST
AL
LA
TION
11
M
A
INTE
NA
NCE
AND
IN
SPE
CTI
O
N
12
TR
OU
BL
ESH
OO
TIN
G
A
P
P
E
NDICE
S
INDE
X
Table12.21 Special register
Number
Name
Meaning
Explanation
Set by
(When set)
Corresponding
CPU
SD210
Clock data
Clock data
(year, month)
• The year (last two digits) and month are stored as BCD code
at SD210 as shown below:
S (Request)/U
QS
SD211
Clock data
Clock data
(day, hour)
• The day and hour are stored as BCD code at SD211 as shown
below:
SD212
Clock data
Clock data
(minute, second)
• The minutes and seconds (after the hour) are stored as BCD
code at SD212 as shown below:
SD213
Clock data
Clock data
(later digits of
year, day of
week)
• Stores the year (two digits) and the day of the week in SD213
in the BCD code format as shown below.
SD232
ROM write
count
ROM write
count up to now
• Store the ROM write count up to now.
S (Writing to
ROM)
SD233
SD240
Base mode
0: Automatic
mode
• Stores the base mode.(0 fixed)
S (Initial)
SD241
Extension
stage number
0: Main base
only
• Stores the maximum number of the extension bases being
installed. (0 fixed)
S (Initial)
b15
b12
to
b11
b8
to
b7
b4
to
b3
b0
to
Example:
September, 2006
0609
H
Year
Month
b15
b12
to
b11
b8
to
b7
b4
to
b3
b0
to
Day
Hour
Example:
25st, 10 a.m.
2510
H
b15
b12
to
b11
b8
to
b7
b4
to
b3
b0
to
Example:
35 min., 48 sec.
3548
H
Second
Second
Minute
b15
b12
to
b11
b8
to
b7
b4
to
b3
b0
to
0
1
2
3
4
5
6
Example:
2006, Monday
2001
H
Higher digits of year (19 or 20)
Sunday
Saturday
Friday
Thursday
Wednesday
Tuesday
Monday
Day of the week
