73K222BL
V.22, V.21, Bell 212A, 103 Single-Chip
Modem with Integrated Hybrid
DATA SHEET
TONE REGISTER (continued)
D7
D6
D5
D4
D3
D2
D1
D0
TR
011
RXD
OUTPUT
CONTR.
TRANSMIT TRANSMIT TRANSMIT DTMF 3 DTMF 2 DTMF 1/
DTMF 0/
ANSWER/
GUARD
GUARD
TONE
ANSWER
TONE
DTMF
OVER-
SPEED
BIT NO.
NAME
CONDITION
DESCRIPTION
D6
Transmit
Guard Tone
0
1
Disables guard tone generator.
Enables guard tone generator (See D0 for selection of
guard tones).
D7
RXD Output
Control
0
1
Enables RXD pin. Receive data will be output on
RXD.
Disables RXD pin. The RXD pin reverts to a high
impedance with internal weak pull-up resistor.
ID REGISTER
D7
D6
D5
D4
D3
D2
D1
D0
ID
110
1
0
X
OH
X
X
X
X
BIT NO.
NAME
CONDITION
DESCRIPTION
D7, D6
D5, D4
DEVICE ID
D7 D6 D5 D4
Indicates device type.
0
0
1
1
1
1
1
0
1
0
1
1
1
1
X
X
X
0
1
0
1
X
X
X
0
0
0
0
73K212AL, 73K321L or 73K322L
73K221AL or 73K302L
73K222AL, 73K222BL
73K224AL
73K324L
73K224BL
73K324BL
D4
OH
0
1
Relay driver open
Open drain driver pulling low.
Mask in firmware.
D5, D3-D1
Not Used
NA
Page: 14 of 26
© 2005, 2008 TERIDIAN Semiconductor Corporation
Rev 7.2
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
