參數(shù)資料
型號(hào)： S-3531A
廠商： Seiko Instruments Inc.
英文描述： CMOS Real-Time Clock IC Supporting an IIC-Bus(支持IIC-BUS的CMOS實(shí)時(shí)時(shí)鐘芯片)
中文描述： CMOS實(shí)時(shí)時(shí)鐘IC支持一個(gè)IIC總線(xiàn)（支持IIC總線(xiàn)的實(shí)時(shí)時(shí)鐘芯片的CMOS）
文件頁(yè)數(shù)： 2/31頁(yè)
文件大?。?/td> 185K
代理商： S-3531A
Seiko Instruments Inc.
1
S-3531A is a CMOS real-time clock IC supporting an I
2
C-BUS, which is
designed to transfer or set each data of a clock and calender as
requested by a CPU. It provides connection with a CPU via two wires
and has two systems of interrupt/alarm and clock output features,
allowing the alleviation of software treatment on the side of a host.
It also works on lower power with the oscillating circuit operated at a
constant voltage. Its package uses an extremely small and thin type of
eight-pin SSOP.
Applications
Block Diagram
REAL-TIME CLOCK
S-3531A
Features
Low power consumption
Wide area of operating voltage : 1.7 to 5.5 V
BCD input/output of year, month, day, day of a week, hour, minute
and second
CPU interface via two wires (I
2
C- BUS)
Auto calender till the year of 2,099 (automatic leap year arithmetic
feature included)
Built-in power voltage detecting circuit
Built-in constant voltage circuit
Built-in flag generating circuit on power on/off
Built-in alarm interrupter
Steady-state interrupt frequency/duty setting feature
Built-in 32 KHz crystal oscillating circuit (Internal Cd, External Cg)
8-pin SSOP package (terminal pitch: 0.65 mm)
(*) I
2
C-BUS is a trademark of PHILLIPS ELECTRONICS N.V.
: 0.7
μ
A typ. (V
DD
=3.0 V)
Cellular phone
PHS
A variety of pagers
TV set and VCR
Camera
Figure 1 Block diagram
INT1 Register
Status register
Oscillating
circuit
SCL
SDA
Timing
generation
Power
voltage
detecting
circuit
Constant
voltage
circuit
V
DD
V
SS
Compa-
rator 1
Second
Minute
Hour
Day of
week
Day
Month
Year
Shift register
I
2
C-BUS
Interface
INT1
XIN
XOUT
Clock
generating
circuit
F
32K
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