參數(shù)資料
型號(hào): 73K324L-IP
廠商: Electronic Theatre Controls, Inc.
英文描述: CCITT V.22bis, V.22, V.21, V.23, Bell 212A Single-Chip Modem
中文描述: 國(guó)際電話電報(bào)諮詢委員會(huì)V.22bis,.22,.21,.23,貝爾212A章單芯片調(diào)制解調(diào)器
文件頁(yè)數(shù): 6/31頁(yè)
文件大?。?/td> 183K
代理商: 73K324L-IP
73K324L
CCITT V.22bis, V.22, V.21, V.23, Bell 212A
Single-Chip Modem
6
REGISTER DESCRIPTIONS
Eight 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. 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 73K324L
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, guard tones, SCT, calling tone,
and RXD output gate used in the modem initial
connect sequence. CR2 is the primary DSP control
interface and CR3 controls transmit attenuation and
receive gain adjustments. All registers are read/write
except for DR and ID which are 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.
DTMF0/GUARD/
ANSWER/
CALLING/SCT
REGISTER
CONTROL
REGISTER
0
ID
REGISTER
SPECIAL
REGISTER
CONTROL
REGISTER
1
DETECT
REGISTER
TONE
CONTROL
REGISTER
CONTROL
REGISTER
2
ID
SR
CR2
CR1
DR
TR
ADDRESS
AD - A0
110
101
100
011
010
001
000
D7
TRANSMIT
PATTERN
1
TRANSMIT
PATTERN
0
RXD
OUTPUT
CONTROL
D6
D5
ENABLE
DETECT
INTERRUPT
RECEIVE
DATA
TRANSMIT
ANSWER
TONE
TRANSMIT
MODE
2
BYPASS
SCRAMBLER/
ADD PH. EQ.
(V.23)
TRANSMIT
DTMF
TRANSMIT
MODE
1
CLK
CONTROL
CARRIER
DETECT
DTMF3
DTMF1/
OVERSPEED
TRANSMIT
MODE
0
RESET
SPECIAL
TONE
DETECT
DTMF2/
4 WIRE FDX
TRANSMIT
ENABLE
TEST
MODE
1
CALL
PROGRESS
DETECT
ANSWER/
ORIGINATE
TEST
MODE
0
SIGNAL
QUALITY
D4
D3
D2
D1
D0
DATA BIT NUMBER
CR0
MODULATION
OPTION
1
1
TRANSMIT
GUARD TONE/
SCT/CALLING
TONE
RECEIVE
LEVEL
0
TX BAUD
CLOCK
SPECIAL
REGISTER
ACCESS
1
RX UNSCR.
DATA
PATTERN
S1 DET
MODULATION
TYPE
1
MODULATION
TYPE
0
CALL
INITIALIZE
UNSCR.
MARK
DETECT
TRANSMIT
S1
TXD
SOURCE
SQ
SELECT 1
SQ
SELECT 0
16 WAY
RESET
DSP
TRAIN
INHIBIT
EQUALIZER
ENABLE
CONTROL
REGISTER
3
CR3
101
TXDALT
TRISTATE
TX/RXCLK
0
RECEIVE
GAIN
BOOST
TRANSMIT
ATTEN.
3
TRANSMIT
ATTEN.
2
TRANSMIT
ATTEN.
1
TRANSMIT
ATTEN.
0
0
0
0
0
X
X
X
X
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