73K212AL TDK [TDK Electronics], 73K212AL Datasheet - Page 8

• Manufacturer Part Number: 73K212AL
• Description: V.22, V.21, Bell 212A, Bell 103 Single-Chip Modem with Integrated Hybrid
• Manufacturer: TDK [TDK Electronics]

V.22, V.21, Bell 212A, Bell 103
Single-Chip Modem with Integrated Hybrid
REGISTER DESCRIPTIONS
Four 8-bit internal registers are accessible for
control and status monitoring. The registers are
accessed
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.
REGISTER BIT SUMMARY
NOTE:
00XX = 73K212AL, 322L, 321L
01XX = 73K221AL, 302L
10XX = 73K222AL, 222BL
1100 = 73K224L, 224BL
1110 = 73K324L, 324BL
REGISTER
CONTROL
REGISTER
CONTROL
REGISTER
DETECT
REGISTER
TONE
CONTROL
REGISTER
ID
REGISTER
0
1
When a register containing reserved control bits is written into, the reserved bits must be
programmed as 0's.
X = Undefined, mask in software
in
CR0
CR1
DR
10
TR
read
AD2 - AD0
ADDRESS
000
001
010
011
110
or
RXD PIN
0 = NORMAL
1 = WEAK PULL-UP
X = Undefined, mask in software
MODULATION
0 = 1200 BIT/S DPSK
1 = 600 BIT/S DPSK
0 = BELL 103 FSK
1 = V.21 FSK
TRANSMIT
CONTROL
PATTERN
OUTPUT
OPTION
write
RXD
D7
1
1
X
00 = TX DATA
01 = TX ALTERNATE
10 = TX MARK
11 = TX SPACE
operations
TRANSMIT
TRANSMIT
PATTERN
GUARD/
0 = OFF
1 = ON
TONE
D6
0
0
0
X
OUTPUTS
RECEIVED
DATA STREAM
INTERRUPT
TRANSMIT
0 = DISABLE
1 = ENABLE
TRANSMIT
ANSWER
ENABLE
DETECT
RECEIVE
0 = OFF
1 = ON
by
MODE
DATA
TONE
D5
3
X
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
8
0 = NORMAL
1 = BYPASS
0 = Disable DTMF
1 = TX DTMF
SCRAMBLER
TRANSMIT
TRANSMIT
SCRAMBLER
BYPASS
UNSCR.
MARKS
MODE
DTMF
0 = OH Relay driver open
1 = OH Open drain driver pulling low
DATA BIT NUMBER
D4
OH
2
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:
0 = XTAL
1 = 16 X DATA
RATE OUTPUT
AT CLK PIN IN
DPSK MODE
ONLY
TRANSMIT
CONTROL
CARRIER
DETECT
DTMF3
MODE
CLK
D3
1
X
0 = CONDITION NOT DETECTED
1 = CONDITION DETECTED
4 BIT CODE FOR 1 OF 16
DUAL TONE COMBINATIONS
0 = NORMAL
1 = RESET
TRANSMIT
ANSWER
DTMF2
RESET
MODE
TONE
D2
X
0
0 = DISABLE
1 = ENABLE
OVERSPEED
PROGRESS
TRANSMIT
ENABLE
DTMF1/
TXA OUTPUT
TXA OUTPUT
MODE
CALL
TEST
D1
00 = NORMAL
01 = ANALOG LOOPBACK
10 = REMOTE DIGITAL
11 = LOCAL DIGITAL
1
X
LOOPBACK
LOOPBACK
0 = 2225 Hz A.T.
1 = 2100 Hz A.T.
0 = ANSWER
1 = ORIGINATE
ORIGINATE/
ANSWER
ANSWER/
1800 Hz G.T.
500 Hz G.T.
GUARD/
DTMF0/
MODE
LOOP
LONG
TONE
TEST
D0
0
X