SH7750_08 Datasheet, PDF (397/1162 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 11 Realtime Clock (RTC)
11.1.3 Pin Configuration
Table 11.1 shows the RTC pins.
Table 11.1 RTC Pins
Pin Name
Abbreviation I/O Function
RTC oscillation circuit crystal pin EXTAL2
Input Connects crystal to RTC oscillation circuit
RTC oscillation circuit crystal pin XTAL2
Output Connects crystal to RTC oscillation circuit
Clock input/clock output
TCLK
I/O External clock input pin/input capture
control input pin/RTC output pin (shared
with TMU)
Dedicated RTC power supply V
DD-RTC
— RTC oscillation circuit power supply pin*
Dedicated RTC GND pin
V_SS-RTC
— RTC oscillation circuit GND pin*
Note: * Power must be supplied to the RTC power supply pins even when the RTC is not used.
11.1.4 Register Configuration
Table 11.2 summarizes the RTC registers.
Table 11.2 RTC Registers
Name
64 Hz
counter
Second
counter
Minute
counter
Hour
counter
Day-of-
week
counter
Day
counter
Initialization
Power-
Abbrevia-
On
Manual Standby Initial
tion
R/W Reset Reset Mode Value
R64CNT R Counts Counts Counts Undefined
RSECCNT R/W Counts Counts Counts Undefined
RMINCNT R/W Counts Counts Counts Undefined
RHRCNT R/W Counts Counts Counts Undefined
RWKCNT R/W Counts Counts Counts Undefined
RDAYCNT R/W Counts Counts Counts Undefined
Area 7
P4 Address Address
Access
Size
H'FFC80000 H'1FC80000 8
H'FFC80004 H'1FC80004 8
H'FFC80008 H'1FC80008 8
H'FFC8000C H'1FC8000C 8
H'FFC80010 H'1FC80010 8
H'FFC80014 H'1FC80014 8
Rev.7.00 Oct. 10, 2008 Page 313 of 1074
REJ09B0366-0700