Z0220112VSGR3470 Zilog, Z0220112VSGR3470 Datasheet - Page 45

• Manufacturer Part Number: Z0220112VSGR3470
• Description: IC MODEM 2400BPS DSP AFE 44-PLCC
• Manufacturer: Zilog

Specifications of Z0220112VSGR3470

• Data Format: V.21, V.22, V.23, Bell 103, Bell 212A
• Baud Rates: 2.4k
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 20. Modem Data Pump Word Definitions (Continued)
PS000904-0107
Register & Address
(hex)
Default
Value
Function and Explanation
b15 TONEA (Tone A Detected)
b14 TONEB (Tone B Detected)
b13 Cascade Biquad Tone Detectors A & B
b7
b5
b4
b0–
b3
The tone frequency programmed in biquad detector A is
detected if this bit is set.
The tone frequency programmed in biquad detector B is
detected if this bit is set.
The two 4th-order biquad tone detectors can be cascaded to
form a single 8th-order biquad tone detector if this bit is set by
the host. The result of the cascaded biquad tone detector is
available in ToneStatus, bit 15.
TONEDIAL (Use DTMF to Dial)
This bit causes the data pump to use DTMF tone dialing when
in dialing mode (Config register, bits 0–6 (MODE) is 3).
SQRDIS (Squarer Disable)
Set SQRDIS to 1 to cause the data pump to provide the output
of biquad detector A directly to the input of biquad detector B,
without first squaring it. SQRDIS is valid only when the biquad
tone detectors are cascaded (see ToneStatus, bit 13).
TIMEDIAL (Timed Dialing)
Set TIMEDIAL to 1 to cause the data pump to generate timed
DTMF tones or pulse dialing. If TIMEDIAL to 0, continuous
dialing is used.
DIAL DIGIT The DTMF digit to be dialed is set here before
Config is set for DTMF transmit. See the table below to
determine how to set this parameter. For pulse dialing, only
digits 0 through 9 are valid:
Digit
0
1
2
3
4
5
6
7
8
Value
0
1
2
3
4
5
6
7
8
V.22BIS Data Pump with Integrated AFE
41