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FO-145A
(4) Image signal processing block
The image signal processing block is composed of the following:
CCD sensor drive block (LZ9FJ11 (IC5)).
A/D converter block (TLS1OI9 (IC3)).
Binary coding processing block
'
LZ9FJ11
W2465S-70LL (IC7)
Descriptions on each block are given below:
1)
CCD drive block
The clock necessary for CCD drive is generated inLZ9FJ11.
b +1
(Transmission clock)
$2(= ~)
(Transmission clock)
OR
(Output buffer reset clock)
$T
(Line synchronizing signal)
2) ND Converter
A 6-bit, high-speed A/D converter TLS1019 (IC3: 30-pin SSOP) is
used to supply A/D-converted digital video signals to the binary cod-
ing processing block according to the clock signal from W9FJ11.
3}
Binary coding processing block
Digital video signals inputted in 6-bit accuracy by gate arrayW9FJ11
(IC5) which incorporates various algorithms required for binary cod-
ing, and RAM (IC7) which stores data
necessary
f or processing are
converted into binary data, and P/S-converted, and DMA-transmitted
to the line memory of the main CPU.
The algorithms for binary coding in the processing block are as fol-
lows:
@ Shading correction
OR process (in the standard mode)
Focus correction
Auto contrast process
e intermediate halftone expression process
(5) Modem (R96SHF) block
INTRODUCTION
The Rockwell R96SHF MONOFAX modem is a synchronous 9600
bits per second (bps) half-duplex modem with error detection and
DTMF reception, It has low power consumption and requires only a
single +5V DC power supply. The modem is housed in a single VLSI
device package.
The modem can operate over the public switched telephone network
(PSTN) through line terminations provided by a data access arrange-
ment (DAA).
The F?96SHFis designed for use in Group 3 facsimile machines. The
modem satisfies the requirements specified in CCl~
recommenda-
tions V.29, V.27 ter, V.21 Channel 2 and T.4, and meets the binary
signaling requirements of T.30.
The modem can operate at 9600, 7200, 4800, 2400, or 300 bps, and
also includes the V.27 ter short training sequence option.
The modem can also perform HDLC framing according to T.30 at
9600, 7200, 4800, 2400, or 300 bps.
The modem features a programmable DTMF receiver and three pro-
grammable tone detectors which operate concurrently with the V.21
channel 2 receiver.
The voice mode allows the host computer to efficiently transmit and
receive audio signals and messages.
The modem is available in either a 100-pin plastic quad flat pack
(PQFP) or a 64-pin quad in-line package (QUIP).
General purpose inputioutput (GPIO) pins are available for host as-
signment in the 100-pin PQFP.
The modem's small size, single voltage supply, and low power con-
sumption allow the design of compact system enclosures for use in
both office and home environments.
MONOFAX is a registered trademark of Rockwell International.
FEATURES
Group 3 facsimile transmissionlreception
– CCl~ V.29, V.27 ter, T.30, V.21 Channel 2, T.4
–
HDLC Framing at all speeds
V.27 ter short train
Concurrent DTMF, FSK, and tone reception
Voice mode transmission/reception
Half-duplex (2-wire)
Programmable maximum transmit level:
OdBmto-15
dBm
Programmable transmit analog attenuation:
OdB to 14 dB in 2 dB steps
Receive dynamic range: OdBm to -43 dBm
Programmable dual tone generation
Programmable tone detection
Programmable turn-on and turn-off thresholds
Programmable interface memory interrupt
Diagnostic capability
– Allows telephone line quality monitoring
Equalization
– Automatic adaptive equalizer
–
Fixed digital compromise equalizer
DTE interface: two alternate ports
– Selectable microprocessor bus (6500 or 8085)
– CCl~ V.24 (EIA-232-D compatible) interface
l'TL and CMOS compatible
Low power consumption: 275 mW (typical)
Single Package
–
100-pin PQFP
– 64-pin QUIP
Single +5VDC power supply
Software compatible with R96MFX, R96EFX, R96DFX, and
R96VFX modems
5-9
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