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10-1-2. Description of Electrical System
1. Main PBA
The main PBA consists of 3 major blocks. All facsimile transceiver control blocks are on this board and all of the mecha-
nism control and operating panel control signal are sent and received from this board.
¢ Fax controller (IFC-P : U1)
« Modem
+ I/O control
Scanner
Control
Sensors
Keypad, LEDs
Video
preprocessing
Comparator
Intergrated
FAX
Controller
IFC-P
U1
|
Personal FaxEngine ™
Data
Control
Sensors
Printer,
Scanner motor
high current
drivers
Expension Bus
Motor
[Fig. 2]
Given next is the memory mapping.
MEMORY MAP
VECTOR
ROM AREA
(CORE)
1FFFh
ROM AREA
(SEC)
SRAM
NOT USED
RAM AREA
spear,
|_SEC RAM
0960h
MISC RAM
H/W RAM
O02E0h
Non zero page RAM
0200h
Not used
0100h
Zero page REG.
eal
Zero
page RAM
0000h
pag
[Fig. 3]
1) Fax Controller (R96PFE , 100 PIN PQFP :U1 )
The fax controller R9I6PFE contains an internal 8 bit central processing unit (CPU), dedicated circuitry optimized signal
Processing, and facsimile machine control.
Hardware Description
29
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