Sharp FO-5700 Service Manual page 59

HD813201F (IC12) Terminal descriptions
Code Terminal No.
DTC 37
READY 73
V 1 29
DD
V 2 49
DD
V 3 72
DD
V 1 10
SS
V 2 17
SS
V 3 34
SS
V 4 53
SS
V 5 70
SS
V 6 75
SS
TEST 0 18
TEST 1 22
TEST 2 24
TEST 3 33
TEST 4 43
Code Terminal No.
CLKI 19
CLKX 20
CKTST1 1
CLKMOD 40
CKTST0 41
CLKO 21
CKTST2 80
Code Terminal No.
RTCH 60
RTCL 61
(10) Page memory block
The page memory block is composed of one DRAM of 1M × 16 bits,
being commonly used as the image memory. The memory is divided
into the page memory for the scanner and the page memory for printing.
The page memory for scanner is composed of the partial area of IC9.
The image data of approx. one page (except in the super fine mode) of
the draft read with the scanner can be stored. They are stored until they
are contracted by CODEC.
The page memory for printing is composed of the remaining areas of
IC9 and can store approx. one page of the image data decoded by
CODEC. The data are stored until they are transferred to PCU with the
gate array (B) and printed.
I/O
O DMA Terminal Count (DMA terminal count terminal). When DTC output is turned
to "high", it indicates that DMA transfer of the setting line part is ended.
I Image memory or I/O device read. When READY is turned to "high" during
writing, it indicates that the image memory or I/O device is ready for
transmitting/receiving the data.
When READY is "high", IDP201 will wait until READY becomes "high".
<Power terminal>
I Power voltage (+5V)
I
I
I
I Ground
I
I
I
I
<Other>
I Fix these terminals at "low".
I
I
I
I
I/O
I Quartz oscillation input terminal and external clock input terminal.
O Quartz oscillation output terminal.
I Low pass filter terminal of PLL circuit.
Connected to capacitor (1000pF) and resistor (10kΩ) through GND.
I Terminal to switch quartz oscillation connection or external clock input mode.
"0": Quartz oscillation.
"1": External clock.
I Fix at "LOW" level.
O Clock output terminal. Rectangular wave which is synchronous with the internal
clock of IDP201 is output.
I Fix at "LOW" level.
I/O
O Number of transfers of EOL detected by IDP201 during RTC receiving is
reflected at the terminal.
O
5 – 15
Function
Name and function
Name and function
FO-5700U