73K224L-28IH TDK [TDK Electronics], 73K224L-28IH Datasheet - Page 9

• Manufacturer Part Number: 73K224L-28IH
• Description: V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem
• Manufacturer: TDK [TDK Electronics]

CONTROL REGISTER 0
CONTROL REGISTER 1
BIT NO.
D1, D0
D2
D3
CR0
000
BIT NO.
D7
CR1
001
MODUL.
OPTION
TRANSMIT
PATTERN
D7
D7
1
NAME
Test Mode
Reset
Clock Control
Modulation
NAME
Option
MODUL.
TYPE 1
D6
TRANSMIT
PATTERN
(continued)
D6
0
MODUL.
TYPE 0
D5
CONDITION
CONDITION
D1
0
0
1
1
DETECT
ENABLE
INT.
0
1
0
1
0
1
D5
TRANSMIT
D0
MODE 2
0
1
0
1
D4
V.22bis/V.22/V.21/Bell 212A/Bell 103
SCRAMB
BYPASS
DESCRIPTION
QAM selects 2400 bit/s. DPSK selects 1200 bit/s.
FSK selects 103 mode.
DPSK selects 600 bit/s.
FSK selects V.21 mode.
DESCRIPTION
Selects normal operating mode.
Analog loopback mode. Loops the transmitted analog
signal back to the receiver, and causes the receiver to use
the same carrier frequency as the transmitter. To squelch
the TXA pin, TRANSMIT ENABLE bit as well as Tone Reg
bit D2 must be low.
Selects remote digital loopback. Received data is looped
back to transmit data internally, and RXD is forced to a
mark. Data on TXD is ignored.
Selects local digital loopback. Internally loops TXD back to
RXD and continues to transmit data carrier at TXA pin.
Selects normal operation.
Resets modem to power down state. All control register bits
(CR0, CR1, CR2, CR3 and Tone) are reset to zero except
CR3 bit D2. The output of the clock pin will be set to the
crystal frequency.
Selects 11.0592 MHz crystal echo output at CLK pin.
Selects 16 X the data rate, output at CLK pin in DPSK/QAM
modes only.
D4
9
TRANSMIT
MODE 1
D3
CONTROL
CLK
D3
TRANSMIT
MODE 0
D2
RESET
Single-Chip Modem
D2
TRANSMIT
ENABLE
D1
MODE 1
TEST
D1
73K224L
ORIGINATE
ANSWER/
MODE 0
D0
TEST
D0