73K222BL-IH 데이터 시트보기 (PDF) - TDK Corporation
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73K222BL-IH Datasheet PDF : 26 Pages
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73K222BL
V.22, V.21, Bell 212A, Bell 103
Single-Chip Modem with Integrated Hybrid
CONTROL REGISTER 1 (continued)
CR1
001
D7
TRANSMIT
PATTERN
1
D6
TRANSMIT
PATTERN
0
D5
ENABLE
DETECT
INTER.
D4
BYPASS
SCRAMB.
D3
CLK
CONTROL
D2
RESET
D1
TEST
MODE
1
D0
TEST
MODE
0
BIT NO.
NAME
CONDITION DESCRIPTION
D4
Bypass
Scrambler
D5
Enable Detect
D7, D6
Transmit
Pattern
DETECT REGISTER
0
1
0
1
D7 D6
0
0
0
1
1
0
1
1
Selects normal operation. DPSK data is passed
through scrambler.
Selects Scrambler Bypass. Bypass DPSK data is
routed around scrambler in the transmit path.
Disables interrupt at INT pin.
Enables INT output. An interrupts will be generated
with a change in status of DR bits D1-D4. The answer
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.
Selects normal data transmission as controlled by the
state of the TXD pin.
Selects an alternating mark/space transmit pattern for
modem testing.
Selects a constant mark transmit pattern.
Selects a constant space transmit pattern.
D7
DR
X
010
D6
D5
D4
X
RECEIVE UNSCR.
DATA
MARK
D3
CARR.
DETECT
D2
ANSWER
TONE
D1
CALL
PROG.
D0
LONG
LOOP
BIT NO.
D0
D1
NAME
Long Loop
Call Progress
Detect
CONDITION
0
1
0
1
DESCRIPTION
Indicates normal received signal.
Indicates low received signal level.
No call progress tone detected.
Indicates presence of call progress tones. The call
progress detection circuitry is activated by energy in
the 350 to 620 Hz call progress band.
11
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