Serial Data Reading From System Control; Writing To The Frame Memory; Transfer From Frame Memory To Line Memory; Thermal Head Control And One Line Memory - Sony UP-960 Service Manual

4-3-1. Serial Data Reading from System Control

The system control (IC505) has four kinds of data to send IC601. There are respectively registers for storing.
Which register is selected by combination of "H" and "L" inputs to IC601 pins 137 and 138.
Pin 137 Pin 138
H H
H L
L H
L L

4-3-2. Writing to the Frame Memory

Image data of next one frame is written in frame memory by inputting fetch pulse from system control to IC601 pin 125.
UP-960/960CE use a 16 M-DRAM (1 word is 16 bit) as image memory. The data is written in DRAM every two sampling
data (16 bit). Memory space is address space of 1024 x 2024 and depth direction of one address is 16 bit.
FETCH
EXTV
(Frame Unit)
EVEN
ODD/
WE

4-3-3. Transfer from Frame Memory to Line Memory

If COPY pulse is inputted from system control to IC601 pin 128, IC601 performs COPYING signal to "L", and the print
operation is started. In order to print, selected one line data from frame memory is transferred to one line memory in IC601.
IC601 reads necessary print data from frame memory. Its print range and print character direction are indicated by mode
set of system control. This data is scaled and stored at one line memory. Transfer of the data is performed every "L"
period of INTV signal. INTV signal is pulse for print timing of one line. It is made at IC601 and locked approximately
10 ms period.

4-3-4. Thermal Head Control and One Line Memory

All thermal head control is performed by IC601. Built-in one line memory is used when transferring a print data to the
thermal head. Refer to the thermal head section for the detail.
4-6
Register to be selected
Image scaling calculation circuit
Gamma data
SYNC signal processing parameter
Various mode setting
IMAGE FETCHING PERIOD
UP-960(UC)
UP-960CE(CE)