Z0220112VEGR3470 Zilog, Z0220112VEGR3470 Datasheet - Page 43
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Z0220112VEGR3470
Manufacturer Part Number
Z0220112VEGR3470
Description
IC MODEM 2400BPS DSP AFE 44-PLCC
Manufacturer
Zilog
Specifications of Z0220112VEGR3470
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
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Table 20. Modem Data Pump Word Definitions (Continued)
PS000904-0107
Register & Address
(hex)
Default
Value
Function and Explanation
b15..
b8
b7
b3
b2
b1
b0
Set these bits to 0 when setting Bufctrl.HDLC to 1.
HDLC (Set HDLC Mode: all data modes)
Set HDLC mode. When parallel data transfer mode is selected
(TPDM is 1) and HDLC is set, the data pump transfers data
using the synchronous HDLC mode. In serial mode (TPDM is
0), this bit has no effect.
The host should set bits 8–15 to 0 when it sets this bit to 1.
SCRDIS (Scrambler Disable: V.22, V.22bis, Bell 212A)
Set this bit to disable the transmitter scrambler. This action
takes precedence over TRNCTRL/TXCTRL.
TXMHLD (Hold Tx Output to Marks: all modes)
Set this bit to force the data pump to transmit only marks to the
remote modem, disregarding data received from the host.
DSCRDIS (Descrambler Disable: V.22, V.22bis, Bell 212A).
Set this bit to disable the receiver descrambler.
RXMHLD (Hold Rx Output to Marks: all modes)
Set RXMHLD to 1 to cause the data pump to transmit only
marks to the host, disregarding data received from the remote
modem.
V.22BIS Data Pump with Integrated AFE
39