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KX-FT937LA-B
6.3.
Control Section
6.3.1.
ASIC (IC1)
This custom IC is used for the general FAX operations.
1. CPU:
This model uses a Z80 equivalent to the CPU operating
at 12 MHz. Most of the peripheral functions are performed
by custom-designed LSIs. Therefore, the CPU only works
for processing the results.
2. RTC:
Real Time Clock
3. DECODER:
Decodes the address.
4. ROM/RAM I/F:
Controls the SELECT signal of ROM or RAM and the
bank switching.
5. CIS I/F:
Controls the document reading.
Note*:
This memory is incorporated into the ASIC (IC1) and used for the image processing.
Descriptions of Pin Distribution (IC1)
NO.
SIGNAL
1
VSSA
2
VDDA 3.3
3
AIN1
4
AIN2
5
AIN3
6
AMON
7
VSS
8
X32OUT
9
X32IN
10
VDD (3.3V / B)
11
XBACEN
12
XRAMCS
13
VDD (3.3V / B)
14
VDD (2.5V/B)
15
FTG
16
F1
17
F2/OP
18
FR/OP
19
CPC
20
RVN
21
IRDATXD/IOP
22
IRDARXD/IOP80
23
TXD/IOP
24
RXD/IOP
25
XRTS/IOP
26
XCTS/IOP
27
VDD (2.5V)
28
TONE1
29
TONE2
30
VOLUREF
31
VOLUOUT
32
VOLUIN
33
XNMI
34
FMEMDO/IOP
35
VDD (3.3V)
36
VSS
37
VSS
6. IMAGE DATA RAM:
7. THERMAL HEAD I/F:
8. MOTOR I/F:
9. OPERATION PANEL I/F:
10. I/O PORT:
11. ANALOGUE UNIT:
I/O
POWER SUPPLIED
VOLTAGE
GND
3.3V
A
3.3V
A
3.3V
A
3.3V
A
3.3V
GND
O
3.3V/BATT
I
3.3V/BATT
-----
I
3.3V/BATT
O
3.3V/BATT
-----
-----
O
3.3V
O
3.3V
O
3.3V
O
3.3V
I
3.3V
I
3.3V
I
3.3V
O
3.3V
I
3.3V
I/O
3.3V
I
3.3V
I/O
3.3V
-----
A
3.3V
A
3.3V
A
3.3V
A
3.3V
A
3.3V
I
3.3V
O
3.3V
-----
GND
GND
14
This memory is programmed into the ASIC and uses 8
KB for the image processing.
Transmits the recorded data to the thermal head.
Controls the transmission motor which feeds the docu-
ment.
Controls the receiving motor which feeds the recording
paper.
Serial interface with Operation Panel.
I/O Port Interface.
Electronic volume for the monitor.
Sends beep tones, etc.
DESCRIPTION
POWER SOURCE (ANALOG GND)
POWER SOURCE (ANALOG +3.3V)
CIS IMAGE SIGNAL INPUT (ATN1)
THERMISTOR TEMPERATURE WATCH INPUT
LINE VOLTAGE DETECTION SIGNAL INPUT (DCIN)
ANALOG SIGNAL MONITOR TERMINAL
POWER SOURCE (GND)
RTC (32.768KHz) CONNECTION
RTC (32.768KHz) CONNECTION
POWER SOURCE (+3.3V/LITHIUM BATTERY)
BACKUP ENABLE
XRAMCS
POWER SOURCE(+3.3V / LITHIUM BATTERY)
POWER SOURCE (+2.5V / LITHIUM BATTERY)
SH SIGNAL OUTPUT FOR CIS (FTG)
01 SIGNAL OUTPUT FOR CIS (F1)
OUTPUT PORT (HEADON)
OUTPUT PORT (MDMRST)
INPUT PORT (CPC)
INPUT PORT (PAPER)
INPUT PORT (JAM)
OUTPUT PORT (HSTX MUTE)
INPUT PORT (BELL)
PORT (TELRXEN)
INPUT PORT (PSHORT)
PORT (MDMTXEN)
POWER SOURCE (+2.5V)
TONE OUTPUT
TONE OUTPUT
ANALOG REF VOLTAGE
VOLUME OUTPUT
VOLUME INPUT
HIGH FIXED
OUTPUT PORT (LED ON)
POWER SOURCE (+3.3V)
POWER SOURCE (GND)
POWER SOURCE (GND)
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