Sharp AL-1611 Service Manual page 80

Pin No. Pin name Signal name
112 DA1 DA1
113 AVSS
114 VSS
115 TCLKD LFTCLK
116 TIOCA2 TMCLK
117 TCLKC SFTCLK
118 TIOCA1 PMCLK
119 TCLKB SPFCLK
120 TCLKA MIRCLK
121 /DACK1
122 /DACK0
123 MD0
124 MD1
125 MD2
126 PG0 RY/BY
127 /CS3 /CS3
128 /CS2 /CS2
(Pin descriptions) IN: Input pin OUT: Output pin BIDIR: Bi-directional pin ODN: Open drain output pin TR1: 3-state output pin POW: Power pin
C. IMAGE ASIC (HG73C039FD)
(1) Outline
The following figure shows the block diagram of the ASIC.
The ASIC is composed of the following three blocks; the image process section, the print control section, and the I/F section.
The image process section processes the image data from the CCD PWB according to the operation mode, such as shading, AE process, resolution
conversion and zooming.
The print control section outputs the image-processed data during copying to the LSU (Laser unit) in synchronization with writing timing of the
LSU.The I/F section controls communication of interface (IEEE1284) with the host PC and controls DRAM of send/receive data buffer with the host
PC. (Only for models with the printer function)
The ASIC is controlled by the CPU which writes the operation mode and the set values necessary for each operation mode to the ASIC control register.
AS
Scan start
ma pr c ss s ct n
S A
S A
I/O
OUT Analog output 1
POW Analog ground pin
POW Ground pin
IN Timer clock external input
OUT Timer clock external output
IN Timer clock external input
OUT Timer clock external output
IN Timer clock external input
IN Timer clock external input

OUT DMAC channel 1 acknowl-
edge

OUT DMAC channel 0 acknowl-
edge

IN Operation mode setting pin
0

IN Operation mode setting pin
1

IN Operation mode setting pin
2
IN General port G0
OUT Area 3 chip select
OUT Area 2 chip select
s ut n c n rs n,
Z m n , ma
pr c ss c rcu t
c ntr
AL-1611/AL-1622 ELECTRICAL SECTION
Function Purpose
CCD reference − side
Separator motor step count
Toner motor clock
Shifter motor step count
Polygon motor clock
SPF motor step count
Mirror motor step count
(Not used)
(Not used)
O p e r a t i o n m o d e s e t t i n g
(MODE 4)
O p e r a t i o n m o d e s e t t i n g
(MODE 4)
O p e r a t i o n m o d e s e t t i n g
(MODE 4)
Flash ROM busy signal
I/ O ex tension AS IC chip
select
Image ASIC chip select
r nt c ntr s ct n
r nt ata pr c ss c rcu t
EEE1 84 c ntr
A c ntr
AS c ntr
s ct n
A
r 4
13 – 5
Descriptions
Separator motor clock input
960Hz clock output
Shifter motor clock input
2078.74Hz clock output
SPF motor clock input
Mirror motor clock input
L: Acknowledge effective
L: Acknowledge effective
Operation mode 4
Operation mode 4
Operation mode 4
0: Busy state
L: Select effective
L: Select effective
S
S
c ntr
S
n r m
r s st r
t t pr nt r
unct n
us
s