Renesas R5S72624 User Manual
Section 14 Realtime Clock
R01UH0134EJ0400 Rev. 4.00
Page 677 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
14.2
Input/Output Pin
Table 14.1 shows the pin configuration.
Table 14.1 Pin Configuration
Pin Name
Symbol
I/O
Description
Realtime clock resonator
crystal pin/
external clock
crystal pin/
external clock
RTC_X1
Input
Connects 32.768-kHz crystal resonator
for this module, and enables to input
the external clock to the RTC_X1 pin.
for this module, and enables to input
the external clock to the RTC_X1 pin.
RTC_X2 Output
Internal clock resonator
crystal/
external clock
crystal/
external clock
EXTAL
Input
Connects crystal resonator used for
internal operation.
internal operation.
For details, see section 5, Clock Pulse
Generator.
Generator.
XTAL Output
14.3
Register Descriptions
Table 14.2 shows the register configuration.
Table 14.2 Register Configuration
Register Name
Abbreviation
R/W
Initial Value
Address
Access
Size
Size
64-Hz counter
R64CNT R
H'xx
H'FFFE6000
8
Second counter
RSECCNT
R/W
H'xx
H'FFFE6002
8
Minute counter
RMINCNT R/W
H'xx
H'FFFE6004 8
Hour counter
RHRCNT
R/W
H'xx
H'FFFE6006
8
Day of week counter
RWKCNT
R/W
H'xx
H'FFFE6008
8
Date counter
RDAYCNT
R/W
H'xx
H'FFFE600A
8
Month counter
RMONCNT
R/W
H'xx
H'FFFE600C
8
Year counter
RYRCNT
R/W
H'xxxx
H'FFFE600E
16
Second alarm register
RSECAR
R/W
H'xx
H'FFFE6010
8
Minute alarm register
RMINAR
R/W
H'xx
H'FFFE6012
8
Hour alarm register
RHRAR
R/W
H'xx
H'FFFE6014
8
Day of week alarm register
RWKAR
R/W
H'xx
H'FFFE6016
8