73K224L-28IH/F TERIDIAN [Teridian Semiconductor Corporation], 73K224L-28IH/F Datasheet - Page 6

• Manufacturer Part Number: 73K224L-28IH/F
• Description: Single-Chip Modem
• Manufacturer: TERIDIAN [Teridian Semiconductor Corporation]

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 73K224L internal state. DR is a detect register
REGISTER BIT SUMMARY
Page: 6 of 31
NOTE: When a register containing reserved control
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
SPECIAL
DETECT
TONE
REGISTER
ID
0
1
2
3
bits is written into, the reserved bits must be
programmed as 0's.
X = Undefined, mask in software
CR0
CR1
CR2
CR3
DR
TR
SR
ID
ADDRESS
AD - A0
000
001
010
011
100
101
101
110
MODULATION
TRANSMIT
PATTERN
RECEIVE
OUTPUT
CONTOL
OPTION
TXDALT
LEVEL
RXD
D7
ID
1
0
0
©
2005, 2008 TERIDIAN Semiconductor Corporation
MODULATION
TRANSMIT
TRANSMIT
REGISTER
TX/RXCLK
TRISTATE
PATTERN
PATTERN
TX BAUD
SPECIAL
ACCESS
S1 DET
GUARD
CLOCK
TYPE
TONE
D6
ID
1
0
MODULATON
INTERRUPT
RX UNSCR.
TRANSMIT
INITIALIZE
RECEIVE
ANSWER
DETECT
ENABLE
TYPE
TONE
DATA
CALL
DATA
D5
ID
0
0
SCRAMBLER
TRANSMIT
TRANSMIT
TRANSMIT
RECEIVE
DETECT
BYPASS
UNSCR.
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. 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:
BOOST
MODE
MARK
DTMF
GAIN
DATA BIT NUMBER
D4
S1
ID
2
0
TRANSMIT
TRANSMIT
CONTROL
CARRIER
SOURCE
DETECT
V.22bis, V.22, V.21, Bell 212A, 103
DTMF3
16 WAY
ATTEN.
MODE
CLK
TXD
D3
X
1
3
DATA SHEET
TRANSMIT
TRANSMIT
SELECT 1
SPECIAL
DETECT
4W/FDX
RESET
DTMF2/
RESET
ATTEN.
MODE
TONE
DSP
SQ
D2
X
0
2
Single-Chip Modem
OVERSPEED
PROGRESS
EXTENDED
TRANSMIT
TRANSMIT
SELECT 0
ENABLE
DETECT
DTMF1/
INHIBIT
ATTEN.
MODE
TRAIN
TEST
CALL
SQ
D1
X
1
1
EQUALIZER
ORIGINATE
TRANSMIT
73K224L
ANSWER/
ANSWER
QUALITY
GUARD/
ENABLE
SIGNAL
DTMF0/
ATTEN.
MODE
TEST
D0
0
0
0
1
Rev 7.1