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73K222BL Datasheet(PDF) 8 Page - TDK Electronics

Part # 73K222BL
Description  V.22, V.21, Bell 212A, Bell 103 Single-Chip Modem with Integrated Hybrid
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Manufacturer  TDK [TDK Electronics]
Direct Link  http://www.tdk.com
Logo TDK - TDK Electronics

73K222BL Datasheet(HTML) 8 Page - TDK Electronics

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73K222BL
V.22, V.21, Bell 212A, Bell 103
Single-Chip Modem with Integrated Hybrid
8
REGISTER DESCRIPTIONS
Four 8-bit internal registers are accessible for
control and status monitoring. The registers are
accessed
in
read
or
write
operations
by
addressing AD0, AD1 and AD2 lines. The address
lines are latched by ALE. Register CR0 controls
the method by which data is transferred over the
phone line. CR1 controls the interface between the
microprocessor and the 73K222BL internal state.
DR is the Detect Register which provides an
indication of monitored modem status conditions.
TR, the Tone Control Register, controls the DTMF
generator, answer and guard tones and RXD
output gate used in the modem initial connect
sequence. All registers are read/write except for
DR which is read only. Register control and status
bits are identified below:
REGISTER BIT SUMMARY
NOTE:
When a register containing reserved control bits is written into, the reserved bits must be
programmed as 0's.
X = Undefined, mask in software
MODULATION
OPTION
00 = NORMAL
01 = ANALOG LOOPBACK
10 = REMOTE DIGITAL
LOOPBACK
11 = LOCAL DIGITAL
LOOPBACK
CONTROL
REGISTER
000
TRANSMIT
MODE
3
TRANSMIT
MODE
2
TRANSMIT
MODE
1
TRANSMIT
ENABLE
ORIGINATE/
ANSWER
DATA BIT NUMBER
AD2 - AD0
REGISTER
ADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
TEST
MODE
0
TEST
MODE
1
RESET
CLK
CONTROL
BYPASS
SCRAMBLER
ENABLE
DETECT
INTERRUPT
TRANSMIT
PATTERN
0
TRANSMIT
PATTERN
1
001
CONTROL
REGISTER
CR1
LONG
LOOP
CALL
PROGRESS
ANSWER
TONE
CARRIER
DETECT
RECEIVE
DATA
010
DETECT
REGISTER
DR
DTMF0/
GUARD/
ANSWER/
TONE
DTMF1/
OVERSPEED
DTMF2
DTMF3
TRANSMIT
DTMF
TRANSMIT
ANSWER
TONE
RXD
OUTPUT
CONTROL
011
TONE
CONTROL
REGISTER
TR
TRANSMIT
MODE
0
0000 = PWR DOWN
0001 = INT SYNCH
0010 = EXT SYNCH
0011 = SLAVE SYNCH
0100 = ASYNCH 8 BITS/CHAR
0101 = ASYNCH 9 BITS/CHAR
0110 = ASYNCH 10 BITS/CHAR
0111 = ASYNCH 11 BITS/CHAR
1100 = FSK
0 = DISABLE
TXA OUTPUT
1 = ENABLE
TXA OUTPUT
0 = ANSWER
1 = ORIGINATE
00 = TX DATA
01 = TX ALTERNATE
10 = TX MARK
11 = TX SPACE
0 = DISABLE
1 = ENABLE
0 = NORMAL
1 = BYPASS
SCRAMBLER
0 = XTAL
1 = 16 X DATA
RATE OUTPUT
AT CLK PIN IN
DPSK MODE
ONLY
0 = NORMAL
1 = RESET
OUTPUTS
RECEIVED
DATA STREAM
0 = CONDITION NOT DETECTED
1 = CONDITION DETECTED
RXD PIN
0 = NORMAL
1 = WEAK PULL-UP
0 = OFF
1 = ON
0 = Disable DTMF
1 = TX DTMF
4 BIT CODE FOR 1 OF 16
DUAL TONE COMBINATIONS
CR0
0 = 1200 BIT/S DPSK
1 = 600 BIT/S DPSK
0 = BELL 103 FSK
1 = V.21 FSK
TRANSMIT
GUARD/
TONE
0 = 2225 Hz A.T.
1800 Hz G.T.
1 = 2100 Hz A.T.
500 Hz G.T.
0 = OFF
1 = ON
UNSCR.
MARKS
ID
REGISTER
10
110
1
0
X
OH
0
X
X
XX
XX
X = Undefined, mask in software
0 = OH Relay driver open
1 = OH Open drain driver pulling low
1
0
00XX = 73K212AL, 322L, 321L
01XX = 73K221AL, 302L
10XX = 73K222AL, 222BL
1100 = 73K224L, 224BL
1110 = 73K324L, 324BL


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