Muratec F-110 Field Engineering Manual page 41

Circuit Description
4-1-3 PROGRAM ROM (FLASH MEMORY)
1) DEVICE
TYPE No.
CAPACITY
2) PROGRAMMING
BEFORE ASS'Y
AFTER ASS'Y
4-1-4 DRAM CONTROL
1) DEVICE
TYPE NO.
CAPACITY
2) OPERATING PRINCIPLE
DRAM can either read or write. The data can be stored in the DRAM only when the power is on. It stores data white the
CPU processes data. The address to read and write the data is specified by RAS SIGNAL and CAS SIGNAL.
DRAMWE*SIGNAL is activated when writing data and DRAMOE*SIGNAL, when reading.
4-1-5 Modem and TX-and RX Related Circuits
MODEM
The Conexant™ FM336 modem is a V.34 half-duplex modem that supports Group 3 facsimile send and receive speeds up to
33600 bps using the V.34 half-duplex mode. Using a V.34 technique to optimize modem configuration for line conditions, the
modem connects at the optimal selected data rate that the channel can support from 33600 bps to 2400 bps.
The modem can operate over the public switched telephone network (PSTN) through a line terminator provided by a Data
Access rrangement (DAA). The modem satisfies the requirements specified inITU-T recommendations V.34, V.17, V.29, V.27
ter, V.23, V.21, and meets the binary signal ingrequirements of V.8 and T.30. Internal HDLC support eliminates the need for an
external serial input/output (SIO) device in the DTE for products incorporating error detection and T.30 protocol. The modem
can perform HDLC framing per T.30 at all data speeds. CRC generation/checking along with zero insertion/deletion enhances
DLC/HDLC frame operations. An FSK flag pattern detector facilitates FSK detection during high speed reception.The modem
features a programmable DTMF transmitter/receiver and three programmable tone detectors which operate in the tone mode.
The modem offers lower power consumption and small size to allow the design of compact system enclosures for use in indus-
trial, office, and home environments.The modem is available in a 100-pin PQFP package.
4-8
AM29F800B
2 Mbit (512K * 16bit * 2)
EPROM PROGRAMMER or PROGRAMMING at the factory
DOWNLOAD from PC
K4E641611D-TC50(EDO Type)
64 Mbit (4M * 16bit)