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參數(shù)資料
| 型號(hào)： | RJ5C15 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類(lèi)： | XO, clock |
| 英文描述： | REAL-TIME CLOCK |
| 中文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大?。?/td> | 137K |
| 代理商： | RJ5C15 |
RP/RF/RJ5C15
2
DSCONTNUED
PIN CONFIGURATIONS
CS
CS
CLKOUT
A
0
A
1
A
2
A
3
RD
GND
V
CC
OSCOUT
OSCIN
ALARM
3
2
1
0
WR
CS
CS
CLKOUT
A
0
A
1
A
2
A
3
RD
GND
V
CC
OSCOUT
OSCIN
ALARM
3
2
1
0
WR
NC
A
0
NC
A
1
NC
A
2
NC
V
NC
ALARM
NC
3
NC
2
NC
5
6
7
8
9
10
11
25
24
23
22
21
20
19
12131415161718
4 3 2 1 282726
A
3
R
G
W
0
1
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
RP5C15 (18pin DIP)
RF5C15 (18pin SOP)
RJ5C15 (28pin PLCC)
PIN DESCRIPTION
*
) Pin numbers shown are for the RP5C15 and the RF5C15. These are different for the RJ5C15.
For specific pin number see the “PIN CONFIGURATIONS”.
Pin No.
Symbol
Function
1,2
CS, CS
The CS and CS are used to interface with external devices. Enabled when CS =“H” and
CS=“L”. The CS is connected to the power down detector in the system power supply
assembly while the CS is connected to the microcomputer.
3
CLKOUT
Output pin for reference clock pulse and an open drain output. Selectable from 8 modes
based on the setting of the clock select register as shown in the separate table.
4,5,6,7
A
0
to A
3
Input pins for the address signal. These pins are connected to the CPU address bus.
8
RD
Input pin for I/O control. The RD is set to “L” when data is transferred from the
RP/RF/RJ5C15 to the CPU.
9
GND
Ground pin for the power supply of 0V.
10
WR
Input pin for I/O control. The WR is set to “L” when data is transferred from the CPU to
the RP/RF/RJ5C15.
11,12,13,14
0
to D
3
Bidirectional data bus. Connected to the data bus of the CPU.
15
ALARM
The ALARM outputs alarm signal and 16Hz and 1Hz clock pulses. This pin is an open
drain output.
16
OSCIN
The OSCIN and OSCOUT are connected to the 32.768kHz crystal oscillator.
17
OSCOUT
32.768kHz
18
V
CC
Input pin for the power supply of +5V.
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