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參數(shù)資料
| 型號： | ML7012-04 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 2400 bps Single Chip Full Duplex Data Modem with Protocol(2400 bps單片、全雙工、V.22bis,V.22,V.21.Modern) |
| 中文描述： | 2400 bps的單芯片全雙工數(shù)據(jù)調(diào)制解調(diào)器的協(xié)議（2400 bps的單片，全雙工，V.22bis，.22，V.21.Modern） |
| 文件頁數(shù)： | 4/22頁 |
| 文件大小： | 124K |
| 代理商： | ML7012-04 |
FEDL 7012-04-01
1
Semiconductor
ML7012-04
4/22
PIN DESCRIPTIONS
System & Clock
Symbol
I/O
Description
OSCO
I
OSC1
O
Pins to connect crystal, resistors and capacitors for the master clock oscillation. When
supplying the master clock from an external source, use OSC0 and leave OSC1 open.
Master clock frequency = 11.0592 MHz. When
PDN
/
RST
=
“
0
”
, OSC1 =
“
1
”
.
PDN
/
RST
I
Power-down and reset control input pin. When
PDN
/
RST
=
“
0
”
, this device is in the
power-down state and internal circuits are reset.
“0”: Power-down state,
“
1
”
: Normal operation
After power-on, use this pin after setting it to “0” for 1 μs or more to reset internal
circuits. Waiting for 230 ms or more is required until restarting a normal operation after
reset release.
If this pin remains at “0” after power-on, the internal circuits become undefined and
the power-down current may increase. To avoid this, input
“
1
”
to this pin and start
oscillation or input the master clock to operate the internal circuits, and then set it to
“
0
”
V.24 Serial Interface
Symbol
STD
I/O
I
Description
Send data input pin
Receive data output pin
When
PDN
/
RST
=
“
0
”
, SRD outputs
“
1
”
.
RTS (Request to Send) signal input pin
CTS (Clear to Send) signal output pin
When
PDN
/
RST
=
“
0
”
, CTS outputs
“
1
”
.
DCD (Data Carrier Detect) signal output pin
When
PDN
/
RST
=
“
0
”
, DCD outputs
“
1
”
.
DSR (Data Set Ready) signal output pin
When
PDN
/
RST
=
“
0
”
, DSR outputs
“
1
”
.
DTR (Data Terminal Ready) signal input pin
CI (Calling Indicator) signal output pin (*2)
When
PDN
/
RST
=
“
0
”
, CI outputs
“
1
”
.
0: Space, 1: Mark
SRD
O
0: Space, 1: Mark
RTS
I
0: On, 1: Off
CTS
O
0: On, 1: Off
DCD
O
0: On, 1: Off
DSR
O
0: On, 1: Off
DTR
I
0: On, 1: Off
CI
O
0: On, 1: Off
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