Z0220112VSGR3470 Zilog, Z0220112VSGR3470 Datasheet - Page 65

• 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

PS000904-0107
Answering Modem
4. Wait for TRNCTRL, bit
5. Wait for 456 msec.
6. Set TRNCTRL, bits
7. Set TRNCTRL, bits
8. Set TRNCTRL, bit
9. Set TRNCTRL, bits
10. Set TRNCTRL, bits
11. In step 7, if SB1 is detected instead of the S1 signal, wait for 765 msec.
1. At a ring signal or a command from the host, take the phone off-hook and
2. If required, use the tone generators to transmit a 2100 Hz tone for 2.6 to 4
3. Set CONFIG register, bits 0–6 (MODE) to
4. Set CONFIG to
5. Set TRNCTRL, bits
6. Inspect TRNCTRL, bit
7. Set TRNCTRL, bits
8. Set TRNCTRL, bits
continuously for 155 msec.
bit
signal or SB1. If SB1 is received for 270 msec, proceed to step 11. If S1 is
received, wait for the S1 to end. Wait for an additional 450 msec.
150 msec.
msec.
being transmitted and received at 2400 bps.
Proceed to set TRNCTRL, bits
Data is now being transmitted and received at 1200 bps.
transmit silence for 1.8 to 2.5 seconds.
seconds. This tone is the V.25 answer tone.
75 msec.
Config, the host is ready to receive data from the remote modem. The data
pump holds the received data to marks (that is, receives nothing) until the
modem is able to receive data from the remote modem.
either a received S1 signal or SB1. If SB1 is received continuously for 270
msec, proceed to step 12. If an S1 signal is received (TRNCTRL, bit
is
1
6
) wait for the S1 to end.
(S1DET) and TRNCTRL, bit
8
(ANSWER MODE, MANUAL HANDSHAKE). After setting
3
0
0
0
0
0
0
0
(V22BIS) to
–
–
–
–
–
–
–
2
2
2
2
2
2
2
6
5
(TXCTRL) to 3 (TRANSMIT SB1), and inspect TRNCTRL,
(TXCTRL) to
(TXCTRL) to 2 (TRANSMIT S1 SIGNAL) for 100 msec.
(TXCTRL) to 6 (2400 bps DATA mode). Data is now
(TXCTRL) to
(TXCTRL) to
(TXCTRL) to
(S1DET) and TRNCTRL, bit
(USB1DET) to be set to 1 (USB1 DETECTED)
0
7
1
–
2
(SB1DET) repeatedly for either a received S1
(force a 16-way receive decision). Wait for
(TXCTRL) to
V.22BIS Data Pump with Integrated AFE
4
1
2
3
(transmit SB1 at 2400 bps). Wait for 200
(transmit USB1).
(transmit S1 signal) for 100 msec.
(transmit SB1) for 350 msec.
0
(STANDBY) and transmit silence for
5
(1200 bps DATA mode).
7
(SB1DET) repeatedly for
6
(S1DET)
61