SH7730 Datasheet, PDF (569/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Section 17 Realtime Clock (RTC)
17.2 Input/Output Pin
Table 17.1 shows the RTC pin configuration.
Table 17.1 Pin Configuration
Name
Abbreviation I/O Function
Crystal resonator
connection for RTC
EXTAL_RTC Input Connects the crystal resonator for the RTC.
XTAL_RTC Output Connects the crystal resonator for the RTC.
Note:
1. When RTC is not to be used, pull EXTAL_RTC up to the power supply voltage (VccQ:
3.3V) for input and output. Do not connect anything to XTAL_RTC.
2. EXTAL_RTC is a pin to which a crystal resonator is connected. In putting on external
clock to this pin is prohibited.
17.3 Register Descriptions
Table 17.2 shows the register configuration. Table 17.3 shows the register states in each operating
mode.
Table 17.2 Register Configuration of RTC
Name
64-Hz counter
Second counter
Minute counter
Hour counter
Day of week counter
Date counter
Month counter
Year counter
Second alarm register
Minute alarm register
Hour alarm register
Day of week alarm register
Date alarm register
Month alarm register
Abbreviation R/W
R64CNT
R
RSECCNT R/W
RMINCNT R/W
RHRCNT
R/W
RWKCNT
R/W
RDAYCNT R/W
RMONCNT R/W
RYRCNT
R/W
RSECAR
R/W
RMINAR
R/W
RHRAR
R/W
RWKAR
R/W
RDAYAR
R/W
RMONAR
R/W
Address
H'A465 FEC0
H'A465 FEC2
H'A465 FEC4
H'A465 FEC6
H'A465 FEC8
H'A465 FECA
H'A465 FECC
H'A465 FECE
H'A465 FED0
H'A465 FED2
H'A465 FED4
H'A465 FED6
H'A465 FED8
H'A465 FEDA
Access Size
8
8
8
8
8
8
8
16
8
8
8
8
8
8
Rev. 1.00 Sep. 19, 2007 Page 521 of 1136
REJ09B0359-0100