73K321L Ver la hoja de datos (PDF) - TDK Corporation
Número de pieza
componentes Descripción
Fabricante
73K321L Datasheet PDF : 24 Pages
| |||
73K321L
CCITT V.23, V.21
Single-Chip Modem
CONTROL REGISTER 1
CR1
001
D7
TRANSMIT
PATTERN
1
D6
TRANSMIT
PATTERN
0
BIT NO.
NAME
D1, D0
Test Mode
D2
Reset
D3
CLK Control
(Clock Control)
D4
Add Ph. Eq.
D5
Enable
Detect
Interrupt
D7, D6
Transmit
Pattern
D5
D4
D3
D2
D1
D0
ENABLE
DETECT
INTER.
ADD
PH. EQ.
CLK
CONTROL
(WRITE 0)
RESET
TEST
MODE
1
TEST
MODE
0
CONDITION
DESCRIPTION
D1 D0
0
0
Selects Normal Operating mode.
0
1
Analog Loopback mode. Loops the transmitted analog
signal back to the receiver, and causes the receiver to
use the same center frequency as the transmitter. To
squelch the TXA pin, transmit enable must be forced low.
1
0
Not used.
1
1
Selects local digital loopback. Internally loops TXD back
to RXD and continues to transmit data from TXA pin.
0
Selects normal operation.
1
Resets modem to power down state. All control register
bits (CR0, CR1, Tone) are reset to zero. The output of
the clock pin will be set to the crystal frequency.
Program as
0
Not supported in the 73K321.See the TXCLK and RXCLK
pin descriptions for 16x the data rate clocks.
0
Selects normal equalization.
1
In V.23 mode, additional phase equalization is added to
the main channel filters when D4 is set to 1.
0
Disables interrupt at INT pin. All interrupts are normally
disabled in Power Down modes.
1
Enables INT output. An interrupt will be generated with a
change in status of DR bits D1-D3. The special tone and
call progress detect interrupts are masked when the TX
enable bit is set. Carrier detect is masked when TX
DTMF is activated. All interrupts will be disabled if the
device is in Power Down mode.
D7 D6
0
0
Selects normal data transmission as controlled by the
state of the TXD pin.
0
1
Selects an alternating mark/space transmit pattern for
modem testing.
1
0
Selects a constant mark transmit pattern.
1
1
Selects a constant space transmit pattern.
9
Share Link: 