Epson RX-8025SA - Page 13

RX - 8025 SA / NB
Page - 10 ETM10E-04
8.2.8. Control register 1 (Reg E)
Address Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
E Control 1 WALE DALE /12 , 24
/CLEN2
TEST CT2 CT1 CT0
(Default) (0) (0) (0) (0) (0) (0) (0) (0)
∗) The default value is the value that is read (or is set internally) after the PON bit has been set to "1," such as after powering up from 0 V or
recovering from a supply voltage drop.
1) WALE bit
This bit is used to set up the Alarm W function (to generate alarms matching day, hour, or minute settings).
WALE Data Description
Write / Read
0 Alarm_W, match comparison operation invalid
∗ Default
1
Alarm_W, match comparison operation valid (/INTB = "L" when
match occurs)
∗ For details, see "8.5. Alarm W Function".
2) DALE bit
This bit is used to set up the Alarm D function (to generate alarms matching hour or minute settings).
DALE Data Description
Write / Read
0 Alarm_D, match comparison operation invalid
∗ Default
1
Alarm_D, match comparison operation valid (/INTA = "L" when
match occurs)
∗ For details, see "8.6. Alarm D Function".
3) /12,24 bit
This bit is used to select between 12-hour clock operation and 24-hour clock operation.
/12,24 Data Description
Write / Read
0 12-hour clock
∗ Default
1 24-hour clock
∗ Be sure to select between 12-hour and 24-hour clock operation before writing the time data.
∗ See also "3) Hour counter" in section 8.2.4.
4) /CLEN2 bit
It combines /CLEN1 bit, and is bit controlling FOUT output.
When /CLEN1 and /CLEN2 bit become 1 even if FOE input is "H", FOUT output stops.
If FOUT output is unnecessary, it functions as RAM-bit and is ( FOE="L" )
When PON bit became 1 because power-on reset function worked, /CLEN1 and /CLEN2 bit become 0.
5) TEST bit
This bit is used by the manufacturer for testing. Be sure to write "0" to this bit.
Be careful to avoid writing a "1" to this bit when writing to other bits.
TEST Data Description
Write / Read
0 Normal operation mode
∗ Default
1 Setting prohibited (manufacturer's test mode)
6) CT2, CT1, and CT0 bits
These bits are used to set up the operation of the periodic interrupt function that uses the /INTA pin.
CT2 CT1 CT0
/INTA pin's output setting
Waveform mode Cycle/Fall timing
0 0 0
−
/INTA = Hi-Z (= OFF)
∗ Default
0 0 1
−
/INTA = Fixed low
0 1 0
Pulse mode
∗1)
2 Hz (50% duty)
0 1 1
Pulse mode
∗1)
1 Hz (50% duty)
1 0 0
Level mode
∗2)
Once per second
(Synchronous with per-second
count-up)
1 0 1
Level mode
∗2)
Once per minute (Occurs when seconds reach ":00")
1 1 0
Level mode
∗2)
Once per hour
(Occurs when minutes and seconds
reach "00:00")
1 1 1
Level mode
∗2)
Once per month
(Occurs at 00:00:00 on first day of
month)
∗ For details, see "8.4. Periodic Interrupt".