73k224bl ETC-unknow, 73k224bl Datasheet - Page 12

• Manufacturer Part Number: 73k224bl
• Description: Single-chip Modem Integrated Hybrid
• Manufacturer: ETC-unknow

73K224BL
V.22bis/V.22/V.21/Bell 212A/103
Single-Chip Modem w/ Integrated Hybrid
CONTROL REGISTER 1
DETECT REGISTER
BIT
D4
D5
D6, D7
BIT
D0
D1
ADDR
ADDR
CR1
001
010
DR
INDICATOR
TRANSMIT
PATTERN
RECEIVE
LEVEL
D7
D7
1
Enable Detect
Signal Quality
Call Progress
Scrambler
Transmit
Interrupt
Indicator
Bypass
Pattern
NAME
NAME
Detect
TRANSMIT
PATTERN
PATTERN
DETECT
(continued)
D6
0
D6
S1
CONDITION
CONDITION
INTERRUPT
RECEIVE
D7 D6
ENABLE
DETECT
0
0
1
1
DATA
D5
D5
0
1
0
1
0
1
0
1
0
1
0
1
DETECT
UNSCR.
MARK
SCRAMBLER
12
D4
DESCRIPTION
Indicates normal received signal.
Indicates low received signal quality (above average
error rate). Interacts with Special Register bits D2, D1.
No call progress tone detected.
Indicates presence of call progress tones. The call
progress detection circuitry is activated by energy in the
normal 350 to 620 Hz call progress bandwidth.
DESCRIPTION
Selects normal operation.
passed through scrambler.
Selects Scrambler bypass.
data is route around scrambler in the transmit path.
Disables interrupt at INT pin. All interrupts are normally
disabled in power-down mode.
Enables INT output. An interrupt will be generated with a
change in status of DR bits D1- D4 and D6. The answer
tone and call progress detect interrupts are masked
when the TX enable bit is set. Carrier detect is masked
when TXDTMF is activated.
disabled if the device is in power-down mode.
Selects normal data transmission as controlled by the
state of the TXDpin.
Selects an alternating mar/space transmit pattern for
modem testing and handshaking.
pattern generation (see CR2 bit D4).
Selects a constant mark transmit pattern.
Selects a constant space transmit pattern.
BYPASS
D4
DETECT
CARR.
D3
CONTROL
CLOCK
D3
ANSWER
DETECT
TONES
D2
RESET
D2
DPSK and QAM data is
Bypass DPSK and QAM
DETECT
PROG.
CALL
All interrupts will be
D1
MODE 1
TEST
Also used for S1
D1
INDICATOR
QUALITY
SIGNAL
MODE 0
D0
TEST
D0