Table of Contents
Advertisement
11.1.3
Pin Configuration
Table 11.1 shows the RTC pins.
Table 11.1 RTC Pins
Pin Name
RTC oscillator crystal pin
RTC oscillator crystal pin
Clock input/clock output
Dedicated RTC power
supply
Dedicated RTC 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
Abbrevia-
Name
tion
64 Hz
R64CNT
counter
Second
RSECCNT R/W
counter
Minute
RMINCNT
counter
Hour
RHRCNT
counter
Day-of-
RWKCNT
week
counter
Day
RDAYCNT R/W
counter
Abbreviation
EXTAL2
XTAL2
TCLK
V
(RTC)
CC
V
(RTC)
SS
Initialization
Power-
On
Manual
R/W
Reset
Reset
Counts Counts Counts
R
Counts Counts Counts
Counts Counts Counts
R/W
Counts Counts Counts
R/W
Counts Counts Counts
R/W
Counts Counts Counts
I/O
Function
Input
Connects crystal to RTC oscillator
Output
Connects crystal to RTC oscillator
I/O
External clock input pin/input capture
control input pin/RTC output pin
(shared with TMU)
—
RTC oscillator power supply pin*
—
RTC oscillator GND pin*
Standby
Initial
Mode
Value
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Area 7
P4 Address
Address
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. 4.0, 04/00, page 219 of 850
Access
Size
Advertisement
Table of Contents
