MV20556 Datasheet, PDF (22/30 Pages) Mosel Vitelic, Corp – 8 - Bit MCU Mouse Controller

MOSEL VITELIC INC.
Preliminary
MV20556
Emulation Board
Model number: M9257
Two layers
There is a 74373 chip soldered under chip 27C512
The 4 KB program code should be programmed into the first 4 KB address location of EPROM 27C512-150
which is inserted into U4 location.
When applying at different working clock, this M9257 demands different speed of EPROM chip
16 MHz: 27C512-200 or faster
25 MHz: 27C512-100 or faster
40 MHz: 27C512-60 or faster
0
40
U1
1
2 cm
TOP
28
15 _VIEW
27C512-mm
U4
21
MSU2031Cnn
20
PRO-
FILE
Timing Critical, Requirement of External Clock (Vss=0.0V is assumed)
Vdd-0.5V
70%Vdd
T CLCL
0.45V
20%Vdd-0.1V
T CHCL
T CLCX
T CLCH
T CHCX
Specifications subject to change without notice, contact your sales representatives for the most recent information.
22/27
PID256** 07/97