參數(shù)資料
型號(hào): RS5C348A-E2
廠商: RICOH COMPANY LTD
元件分類: XO, clock
英文描述: Real-Time Clock
中文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO10
封裝: 6.40 X 3.50 MM, 1.25 MM HEIGHT, 0.5 MM PITCH, SSOP-10
文件頁數(shù): 6/53頁
文件大小: 452K
代理商: RS5C348A-E2
3
R
×
5C348A/B
PIN DESCRIPTIONS
Pin No.
Symbol
Item
Description
7
CE
Chip Enable Input
The CE pin is used for interfacing with the CPU. Should be held high to allow access to
the CPU. Incorporates a pull-down resistor. Should be held low or open when the CPU
is powered off. Allows a maximum input voltage of 5.5 volts regardless of supply
voltage.
2
SCLK
Serial Clock Input
The SCLK pin is used to input clock pulses synchronizing the input and output of
data to and from the SI and SO pins. Allows a maximum input voltage of 5.5 volts
regardless of supply voltage.
4
SI
Serial Input
The SI pin is used to input data intended for writing in synchronization with the
SCLK pin. CMOS input. Allows a maximum input voltage of 5.5 volts regardless of
supply voltage.
3
SO
Serial Output
The SO pin is used to output data intended for reading in synchronization with the
SCLK pin. CMOS output.
6
INTR
Interrupt Output
The INTR pin is used to output periodic interrupt signals to the CPU and alarm
interrupt signals. Disabled at power-on from 0 volts. Nch. open drain output.
1
32KOUT
32-kHz Clock Output
The 32KOUT pin is used to output 32.768-kHz clock pulses. Enabled at power-on
from 0 volts. Nch. open drain output. The R
×
5C348A is designed to be disabled
32-kHz clock output in response to a command from the host computer and the
R
×
5C348B is designed to keep 32-kHz output enabled.
The OSCIN and OSCOUT pins are used to connect the 32.768-kHz crystal
oscillator (with all other oscillation circuit components built into the
R
×
5C348A/B).
The VDD pin is connected to the power supply. The VSS pin is grounded.
9
8
OSCIN
OSCOUT
Oscillatory Circuit
Input/Output
10
5
VDD
VSS
Positive Power Supply Input
Negative Power Supply Input
相關(guān)PDF資料
PDF描述
RS5C348B-E2 Real-Time Clock
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