Sharp UX-4000M Service Manual - Page 78

Panel control block, ASIC/Printing control block, ASIC [LR38784 208pin embedded gate array - driver

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UX-4000MU FO-2950MU/C (2) Panel control block The following controls are performed by the Gate array (LR38784). • Operation panel key scanning • Operation panel LCD display (3) ASIC/Printing control block 1) ASIC [LR38784 208pin (embedded gate array) functions(IC15) 1 Mapper Mapping can connect the modem and image handing LSI to a domain of CS2 (Chip Select 2). 2 Real-time-clock interface This interface has the clock-synchronous type serial transfer mode and can write and read to the CLOCK IC (SM8578BV or NJU6355). 3 Image handing LSI interface This interface has parallel or serial transfer mode with the image handing LSI. 4 GDI ASIC This function GDI i/f for PC printing only. 5 IEEE1284 This function IEEE 1284 i/f for PC scanning and PC fax. 6 Sending motor control This function outputs the sending motor control signals of 2 or 1-2 phase excitation to the motor driver. 7 Buzzer and Ringer control This function outputs a buzzer (1042Hz) or a ringer (controlled signal) signal. 8 Laser signal control This function controls to output laser beam. 9 Protection circuits LR38784 has protection circuits for a pick-up-solenoid and a heater. LR38784 (IC15) Terminal description Pin No. I/O 1 - 2 - 3 I 4 I 5 I 6 TO 7 TO 8 TO 9 TO 10 TO 11 O 12 TO 13 IOR 14 - 15 IOR 16 IOR 17 IOR 18 IU 19 IU 20 IU 21 IU 22 IU 23 I 24 I 25 I 26 I 27 O 28 O 29 O 30 O 31 - 32 IS 33 O 34 O 35 O 36 I 37 O 38 O 39 I 40 I 41 I 42 ID 43 I 44 I 45 I Signal name GND GND LCPD3 LCPD4 LCDREQ LEDDV4 LEDDV3 LEDDV2 LEDDV1 RS LCDACKZ E LD3 GND LD2 LD1 LD0 SEN4Z SEN3Z SEN2Z SEN1Z SEN0Z FRSNS ORGSNS B4SNS MDMINTZ MDMRDZ MDMWRZ MDMCSZ MDMRSTZ GND CK16M OE3Z WE3Z BZOUT LCINT LCRDZ LCWRZ SD SDE SDCK MTST DACK0Z DACK1Z DRAK0 5 - 6 manuals4you.com

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UX-4000MU
FO-2950MU/C
(2) Panel control block
The following controls are performed by the Gate array (LR38784).
•
Operation panel key scanning
•
Operation panel LCD display
(3) ASIC/Printing control block
1) ASIC [LR38784 208pin (embedded gate array)
functions(IC15)
Mapper
Mapping can connect the modem and image handing LSI to a do-
main of CS2 (Chip Select 2).
Real-time-clock interface
This interface has the clock-synchronous type serial transfer mode
and can write and read to the CLOCK IC (SM8578BV or NJU6355).
Image handing LSI interface
This interface has parallel or serial transfer mode with the image
handing LSI.
GDI ASIC
This function GDI i/f for PC printing only.
IEEE1284
This function IEEE 1284 i/f for PC scanning and PC fax.
Sending motor control
This function outputs the sending motor control signals of 2 or 1-2
phase excitation to the motor driver.
Buzzer and Ringer control
This function outputs a buzzer (1042Hz) or a ringer (controlled sig-
nal) signal.
Laser signal control
This function controls to output laser beam.
Protection circuits
LR38784 has protection circuits for a pick-up-solenoid and a heater.
Pin No.
I/O
Signal name
1
–
GND
2
–
GND
3
I
LCPD3
4
I
LCPD4
5
I
LCDREQ
6
TO
LEDDV4
7
TO
LEDDV3
8
TO
LEDDV2
9
TO
LEDDV1
10
TO
RS
11
O
LCDACKZ
12
TO
E
13
IOR
LD3
14
–
GND
15
IOR
LD2
16
IOR
LD1
17
IOR
LD0
18
IU
SEN4Z
19
IU
SEN3Z
20
IU
SEN2Z
21
IU
SEN1Z
22
IU
SEN0Z
23
I
FRSNS
24
I
ORGSNS
25
I
B4SNS
26
I
MDMINTZ
27
O
MDMRDZ
28
O
MDMWRZ
29
O
MDMCSZ
30
O
MDMRSTZ
31
–
GND
32
IS
CK16M
33
O
OE3Z
34
O
WE3Z
35
O
BZOUT
36
I
LCINT
37
O
LCRDZ
38
O
LCWRZ
39
I
SD
40
I
SDE
41
I
SDCK
42
ID
MTST
43
I
DACK0Z
44
I
DACK1Z
45
I
DRAK0
LR38784 (IC15) Terminal description
5 – 6
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