System Rom Module (Ys01); Ram (U6 And U9) - Kyocera Ecosys FS-600 Service Manual

System ROM module (YS01)

The system ROM module contains information for controlling the controller CPU. This
ROM is served by the controller CPU PPC401GF (50MHz). This module incorporated the
following features:
DIMM socket No.
Number of pins
Size
Composition
Access speed

RAM (U6 and U9)

The RAM temporarily holds print data and font information transferred from the host
buffers. The size of the RAM is expandable using PC SIMM's of comprehensive type. The
standard RAM size is 4MB. The maximum expanded RAM size is 34 MB.
Number of RAM's
Socket Nos.
Number of pins
Size
Composition
Access speed
The expansion SIMM should incorporate the following features:
Number of socket
Socket No.
Number of pins
Size
Access speed
YS01
72
4 MB
128 k by 32 bits
<100 ns
4
U6 and U7
40, SOJ
4 MB
512 kB
≤70 nS
1
YS02
72
4/8/16/32 MB
<80 nS
4-35
Operation theory
Operation overview
FS-600/FS-680