Toshiba e-STUDIO170F Service Manual page 247

[ 2 ] PC Facsimile Transmission
There are the following two PC facsimile transmission modes: the PC direct transmission mode in
which the document data sent from the PC is transmitted page by page and the PC indirect transmis-
sion mode in which all the document data is read and stored in memory before being transmitted.
PSTN
NCU PBA
( 7 )
IC53 IC49
MODEM USB controller
MODEM I/F PC I/F
* Details regarding each area of SDRAM used
(2): PC I/F > SDRAM (PIX area: PC buffer)
(3): SDRAM (PIX area: PC buffer) > SDRAM (PIX area: CODEC buffer)
(4): SDRAM (PIX area: CODEC buffer) > SDRAM (SYS area: Image memory)
(5): SDRAM (SYS area: Image memory) > SDRAM (PIX area: CODEC buffer)
(6): SDRAM (PIX area: CODEC buffer) > SDRAM (SYS area: Transmit data buffer)
(7): SDRAM (SYS area: Transmit data buffer) > MODEM I/F
January 2005 © TOSHIBA TEC
PC
( 1 )
IC16
CODEC
CODEC I/F
IC15
ASIC
( Engine controller )
( 2 )
SDRAM controller
( 5 )
IC1 IC1 IC1
SYS area*
SDRAM SDRAM SDRAM
Main PBA
Fig.7-16
7 - 17
PTC I/F
( 3 )
( 4 ) ( 6 )
PIX area*
e-STUDIO170F Circuit Description
IC27
DSC
DSC I/F
7