73K222AL-IH 查看數據表（PDF） - TDK Corporation
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73K222AL-IH Datasheet PDF : 28 Pages
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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 the A0, A1
and A2 address lines in serial mode, or the AD0,
AD1 and AD2 lines in parallel mode. In parallel
mode 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
REGISTER BIT SUMMARY
73K222AL
V.22, V.21, Bell 212A, 103
Single-Chip Modem
73K222AL internal state. DR is a 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
REGISTER
AD2 - AD0
D7
D6
CONTROL
REGISTER CR0
000
MODULATION
OPTION
0
0
CONTROL
REGISTER C R 1
001
1
TRANSMIT
PATTERN
1
TRANSMIT
PATTERN
0
DETECT
REGISTER
DR
010
X
X
DATA BIT NUMBER
D5
D4
D3
TRANSMIT
MODE
3
TRANSMIT
MODE
2
TRANSMIT
MODE
1
ENABLE
DETECT
INTERRUPT
BYPASS
SCRAMBLER
CLK
CONTROL
RECEIVE
DATA
UNSCR.
MARKS
CARRIER
DETECT
D2
TRANSMIT
MODE
0
RESET
ANSWER
TONE
D1
TRANSMIT
ENABLE
TEST
MODE
1
CALL
PROGRESS
D0
ANSWER/
ORIGINATE
TEST
MODE
0
LONG
LOOP
TONE
CONTROL
TR
011
REGISTER
CONTROL
REGISTER C R 2
100
2
CONTROL
REGISTER C R 3
101
3
ID
REGISTER
ID
110
RXD
OUTPUT
CONTROL
X
TRANSMIT
GUARD
TONE
X
TRANSMIT
ANSWER
TONE
X
TRANSMIT
DTMF
DTMF3
DTMF2
DTMF1/
OVERSPEED
DTMF0/
GUARD/
ANS TONE
THESE REGISTER LOCATIONS ARE RESERVED FOR
X
X
X
X
USE WITH OTHER K-SERIES FAMILY MEMBERS
X
ID
ID
ID
ID
X
X
X
X
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
7
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