73K221AL 데이터 시트보기 (PDF) - TDK Corporation
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73K221AL Datasheet PDF : 26 Pages
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73K222BL
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 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.
REGISTER BIT SUMMARY
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:
ADDRESS
DATA BIT NUMBER
REGISTER
AD2 - AD0
D7
D6
D5
D4
D3
D2
D1
D0
CONTROL
REGISTER
0
CR0
000
MODULATION
OPTION
0
TRANSMIT
MODE
3
TRANSMIT
MODE
2
TRANSMIT
MODE
1
TRANSMIT
MODE
0
TRANSMIT
ENABLE
ORIGINATE/
ANSWER
CONTROL
REGISTER
CR1
001
1
0 = 1200 BIT/S DPSK
1 = 600 BIT/S DPSK
0 = BELL 103 FSK
1 = V.21 FSK
TRANSMIT
PATTERN
1
TRANSMIT
PATTERN
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
ENABLE
DETECT
INTERRUPT
BYPASS
SCRAMBLER
CLK
CONTROL
0 = DISABLE
0 = ANSWER
TXA OUTPUT 1 = ORIGINATE
1 = ENABLE
TXA OUTPUT
RESET
TEST
MODE
1
TEST
MODE
0
DETECT
REGISTER
DR
010
00 = TX DATA
01 = TX ALTERNATE
10 = TX MARK
11 = TX SPACE
X
X
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
00 = NORMAL
01 = ANALOG LOOPBACK
10 = REMOTE DIGITAL
LOOPBACK
11 = LOCAL DIGITAL
LOOPBACK
RECEIVE
DATA
UNSCR.
MARKS
CARRIER
DETECT
ANSWER
TONE
CALL
PROGRESS
LONG
LOOP
TONE
CONTROL
REGISTER
ID
REGISTER
TR
011
10
110
RXD
OUTPUT
CONTROL
TRANSMIT
GUARD/
TONE
RXD PIN
0 = OFF
0 = NORMAL
1 = ON
1 = WEAK PULL-UP
OUTPUTS
RECEIVED
DATA STREAM
TRANSMIT
ANSWER
TONE
TRANSMIT
DTMF
0 = OFF
1 = ON
0 = Disable DTMF
1 = TX DTMF
0 = CONDITION NOT DETECTED
1 = CONDITION DETECTED
DTMF3
DTMF2
DTMF1/
OVERSPEED
DTMF0/
GUARD/
ANSWER/
TONE
4 BIT CODE FOR 1 OF 16
DUAL TONE COMBINATIONS
0 = 2225 Hz A.T.
1800 Hz G.T.
1 = 2100 Hz A.T.
500 Hz G.T.
1
0
X
OH
X
X
X
X
00XX = 73K212AL, 322L, 321L
01XX = 73K221AL, 302L
10XX = 73K222AL, 222BL
1100 = 73K224L, 224BL
1110 = 73K324L, 324BL
X = Undefined, mask in software
0 = OH Relay driver open
1 = OH Open drain driver pulling low
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
8
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