tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 217

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
15. Real Time Clock (RTC)
15.1 Configuration
15.2 Control
Low power consumption register 2
Real time clock control register
POFFCR2
(0x0FC8)
(0x0F76)
RTCCR
clock.
SLEEP0.
The real time clock is a function that generates interrupt requests at certain intervals using the low-frequency
The number of interrupts is counted by the software to realize the clock function.
The real time clock can be used only in the operation modes where the low-frequency clock oscillates, except for
The real time clock is controlled by following resisters.
(32.768 kHz)
SIO0EN
RTCEN
Read/Write
Read/Write
Bit Symbol
Bit Symbol
After reset
After reset
fs
RTC control
SIO0 control
R/W
R
7
0
7
0
-
-
RTCCR
RTCRUN
Figure 15-1 Real Time Clock
RTCSEL
R/W
R
6
0
6
0
-
-
RTCEN
2
R/W
15
R
/fs 2
5
0
5
0
-
Page 203
Binary counter
14
0
1
0
1
/fs 2
Disable
Enable
Disable
Enable
13
/fs 2
R/W
R
4
0
4
0
-
-
Selector
12
/fs 2
11
/fs 2
R/W
3
0
3
0
-
10
/fs 2
9
/fs
RTCSEL
2
R/W
R/W
8
2
0
2
0
/fs
-
R/W
INTRTC
interrupt request
1
1
0
0
-
TMP89FM42
RTCRUN
SIO0EN
R/W
R/W
0
0
0
0