Sharp FO-5700, Руководство по обслуживанию, Страница: 59 / 140

FO-5700U
5 – 15
HD813201F (IC12) Terminal descriptions
Code Terminal No. I/O Function
DTC 37 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.
READY 73 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>
V
DD
1 29 I Power voltage (+5V)
V
DD
2 49 I
V
DD
3 72 I
V
SS
1 10 I
V
SS
2 17 I Ground
V
SS
3 34 I
V
SS
4 53 I
V
SS
5 70 I
V
SS
6 75 I
<Other>
TEST 0 18 I Fix these terminals at "low".
TEST 1 22 I
TEST 2 24 I
TEST 3 33 I
TEST 4 43 I
Code Terminal No. I/O Name and function
CLKI 19 I Quartz oscillation input terminal and external clock input terminal.
CLKX 20 O Quartz oscillation output terminal.
CKTST1 1 I Low pass filter terminal of PLL circuit.
Connected to capacitor (1000pF) and resistor (10k
Ω
) through GND.
CLKMOD 40 I Terminal to switch quartz oscillation connection or external clock input mode.
"0": Quartz oscillation.
"1": External clock.
CKTST0 41 I Fix at "LOW" level.
CLKO 21 O Clock output terminal. Rectangular wave which is synchronous with the internal
clock of IDP201 is output.
CKTST2 80 I Fix at "LOW" level.
(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.
Code Terminal No. I/O Name and function
RTCH 60 O Number of transfers of EOL detected by IDP201 during RTC receiving is
RTCL 61 O
reflected at the terminal.