R2023K/T
PIN DESCRIPTION
Symbol
SCL
Item
Serial Clock
Line
Serial Data Line
Description
The SCL pin is used to input clock pulses synchronizing the input and
output of data to and from the SDA pin. Allows a maximum input voltage of
5.5v regardless of supply voltage.
The SDA pin is used to input and output data intended for writing and
reading in synchronization with the SCL pin. Allows a maximum input
voltage of 5.5v regardless of supply voltage. Nch. open drain output.
The INTRA pin is used to output alarm interrupt (Alarm_D) and periodic
interrupt signals to the CPU. Disabled at power-on from 0V. N-channel
open drain output. Allows a maximum pull-up voltage of 5.5v regardless of
supply voltage.
The INTRB pin is used to output alarm interrupt (Alarm_W) to the CPU.
Disabled at power-on from 0V. N-channel open drain output. Allows a
maximum pull-up voltage of 5.5v regardless of supply voltage.
The 32KOUT pin is used to output 32.768-kHz clock pulses. The pin is
CMOS push-pull output. The output is disabled and held “L” when CLKC
pin is set to “L” or open, or certain register setting. This pin is enabled at
power-on from 0v.
The CLKC pin is used to control output of the 32KOUT pin. The clock
output is disabled and held “L” when this pin is set to “L” or open.
Incorporated pull down register.
The OSCIN and OSCOUT pins are used to connect the 32.768-kHz crystal
oscillator (with all other oscillation circuit components built into the
R2023K/T).
The VDD pin is connected to the power supply. The VSS pin is grounded.
SDA
INTRA
Interrupt
Output A
INTRB
Interrupt
Output B
32kHz Clock
Output
32KOUT
CLKC
Clock Control
OSCIN
OSCOUT
VDD
VSS
(VSS)
Oscillation
Circuit
Input / Output
Positive/Negative
Power
Supply Input
Please connect to ground line, or do not connect any lines.
3
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
