Table of Contents
Advertisement
Pin No.
KS32C6500
136
GIP3
137
GIP4
138
GOP2
139
LFIA0
140
LFPHA
141
LFIA1
142
LFIB0
143
LFPHB
144
LFIB1
145
EEDATA
146
EECLK
147
GND9
148
GOP3
149
GOP4
150
GOP8
151
GOP9
152
GOP10
153
GOP11
154
GOP6
155
GOP7
156
VDDRTC
157
RXI
158
RXO
159
_PHGA13
160
_PHGA12
5-3. Memory
System memory consists of 512 kB ROM, 32 kB SRAM and 1024 kB DRAM. All of SRAM is backed up. ROM
and SRAM are selected by chip select lines, and data is accessed by the units position of the byte.
5V power is applied to SRAM through VSB. This facsimile machine uses a Lithium battery for memory backup.
A, 820 ohm resistor in series with the positive battery terminal is for battery protection.
5-4. Modem and TX- and RX- Related Circuits
These circuits control transmission between the internal MODEM and the LIU or a remote MODEM.
The KS16117 is a single-chip fax-MODEM having features to detect and generate DTMF tones. TX OUT is the
MODEM output port, and RX IN is the input port. /PORI is the Jupiter-2 signal which enables MODEM
initialization at system power on. D0 - D7 are data buses. RS0 - RS4 are internal register select signals which
determine the mode. /CS is the chip select signal, and /RD /WR are the read and write control signals. RLSD
is used for v.24 interface-related signals and /IRQ is the MODEM interrupt.
Samsung Electronics
ATLAS used pin
GIP3
GIP4
GOP2
LFIA0
LFEN
LFIA1
LFIB0
NOT-USED
LFIB1
NOT-USED
NOT-USED
GND9
GOP3
GOP4
NOT-USED
GOP9
GOP10
NOT-USED
NOT-USED
NOT-USED
VDDRTC
RXI
RXO
NOT-USED
NOT-USED
Pin Description
TX INT
_XDREQ (SDIP4)
_XDACK (SDIP4)
LF MOTOR PHASE CONTROL
LF MOTOR ENABLE
LF MOTOR PHASE CONTROL
LF MOTOR PHASE CONTROL
LF MOTOR PHASE CONTROL
KEY CLICK
POR CONTROL
SDIP4 CLK (30MHZ)
_RESET OUT
RTC BACK-UP
RTC CLK IN
RTC CLK OUT
Circuit Description
5-9
Advertisement
Table of Contents
