rs5c62 RICOH Co.,Ltd., rs5c62 Datasheet - Page 5

• Manufacturer Part Number: rs5c62
• Description: Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

RP/RF/RS5C62
• Directly connected to CPU, enabling fast access.
• 4bit bidirectional data bus, and 4bit address bus.
• The oscillator is driven by a constant voltage, so the oscillation frequency is stable even when the power supply
• Built-in timer counter using internal clock.
• Generates cyclic CPU interrupts, and generates alarm-match interrupts.
• Interrupt flag and interrupt inhibit.
• Clock (hour, minute, second), calendar (leap year, year, month, day, day-of-the-week), alarm (hour, minute).
• 12-or 24-hour mode is selectable.
• Recognizes leap years automatically.
• All clock and alarm data expressed in BCD codes.
• ±30 seconds adjustment function.
• Determines whether clock data is valid or invalid.
• Consumes very low power due to CMOS technology, so it can be backed up by batteries.
• Power supply voltage between 3.0 to 5.0V.
• Time keeping supply voltage between 2.0 to 6.0V.
• Package : 18pin DIP for RP5C62, 18pin SOP for RF5C62, 20pin SSOP for RS5C62.
BLOCK DIAGRAM
OUTLINE
and alarm functions in direct coupling with the data buses of CPUs such as 8086 and 68000. A built-in timer counter
acts as a watchdog timer or interrupt timer. They are available in three different types of packages: the DIP type,
the SOP type, and the SSOP type.
FEATURES
voltage fluctuates.
The RP/RF/RS5C62 are CMOS LSIs which serve microcomputers as real-time clocks providing time, calendar,
OSCIN
OSCOUT
CE
CS
RD
WR
OSC DETECT
OSC
DATA BUS
CONTROL
D0D1D2
DIV
D3
ADDRESS BUS
WATCH & CALENDAR
CONTROL REGISTER
CONTROL
ALARM REGISTER
A0 A1 A2 A3
COMPARATOR
REAL-TIME CLOCK
DECODER
ADDRESS
INTERRURT
CONTROL
TIMER
VDD
VSS
INTR
TMOUT
1