73k322l ETC-unknow, 73k322l Datasheet - Page 7

• Manufacturer Part Number: 73k322l
• Description: Ccitt V.23, V.22, V.21 Single-chip Modem
• Manufacturer: ETC-unknow

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 and A1
address lines in Serial mode, or the AD0 and AD1
lines in Parallel mode. The AD0 and AD1 lines are
latched by ALE. Register CR0 controls the method
by which data is transferred over the phone line.
REGISTER BIT SUMMARY
NOTE:
REGISTER
CONTROL
REGISTER
CONTROL
REGISTER
REGISTER
CONTROL
REGISTER
CONTROL
REGISTER
CONTROL
REGISTER
DETECT
TONE
REGISTER
ID
0
1
2
3
When a register containing reserved control
bits is written into, the reserved bits must
be programmed as 0's.
CR0
CR1
CR2
CR3
DR
TR
ID
AD2 - AD0
ADDRESS
000
001
010
011
100
101
110
MODULATION
TRANSMIT
CONTROL
PATTERN
OUTPUT
OPTION
RXD
D7
1
ID
TRANSMIT
TRANSMIT
PATTERN
CALLING
GUARD/
TONE
D6
0
ID
INTERRUPT
TRANSMIT
TRANSMIT
ANSWER
ENABLE
DETECT
RECEIVE
MODE
DATA
TONE
D5
3
ID
7
SCRAMBLER/
ADD PH. EQ.
TRANSMIT
TRANSMIT
BYPASS
UNSCR.
MARKS
CR1
microprocessor and the 73K322L 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:
MODE
(V.23)
DTMF
DATA BIT NUMBER
D4
2
ID
THESE REGISTER LOCATIONS ARE RESERVED FOR
USE WITH OTHER K-SERIES FAMILY MEMBERS
controls
TRANSMIT
CONTROL
CARRIER
DETECT
DTMF3
MODE
CLK
D3
1
CCITT V.23, V.22, V.21
Single-Chip Modem
the
TRANSMIT
SPECIAL
V.23 FDX
DTMF2/
RESET
MODE
TONE
D2
0
interface
PROGRESS
OVERSPEED
TRANSMIT
ENABLE
DTMF1/
CALL
MODE
TEST
D1
1
between
ANSWER/SPEC.
DTMF0/GUARD/
TONE SELECT
ORIGINATE
ANSWER/
MODE
LONG
LOOP
TEST
D0
0
the