
ADVANCE DATA BOOK v2.0
June 1997
20
PIN DESCRIPTIONS
CL-PS7500FE
System-on-a-Chip for Internet Appliance
READY
IT
READY:
This pin can stretch I/O accesses when set low during a
16-MHz PC-type I/O cycle.
nIORQ
OCZ
2
I/O REQUEST:
This signal is for the module-type I/O for handshak-
ing, together with nIOGT.
nIOGT
IT
I/O GRANT:
This signal is for the module-type I/O for handshaking,
together with nIORQ.
nBLI
IT
This input is used during module-type I/O reads to cause the latch-
ing of data from the BD port.
nBLO
OCZ
1
This signal is the latching signal for use with external latches on the
upper 16 bits of the external datapath to create a 32-bit-wide I/O
bus.
nRBE
OCZ
1
This active-low read enable is used to create a 32-bit-wide I/O bus
for an external transceiver attached to the upper 16 bits of the I/O
bus.
nWBE
OCZ
1
This active-low write enable is used to create a 32-bit-wide I/O bus
for an external transceiver attached to the upper 16 bits of the I/O
bus.
nXIPMUX16
IT
This signal is for XIP (execute in place) support. This signal multi-
plexes 16 bits of data from the upper or lower halfword of the
CL-PS7500FE internal data bus to the 16-bit I/O bus, depending on
its state during writes.
nXIPLATCH
IT
This signal is for XIP support and latches the upper 16 bits of data
from the I/O bus while the lower 16 bits are being read. This signal
is used in conjunction with nXIPMUX16 to enable XIP (for example,
from a 16-bit PCMCIA card).
nSIOCS1
OCZ
1
This is the active-low chip select for simple I/O.
nSIOCS2
OCZ
1
This is the active-low chip select for simple I/O, with address decode
modified according to the state of SETCS.
nMSCS
OCZ
2
This is the active-low chip select for module-type I/O, with address
decode modified according to the state of SETCS.
nEASCS
OCZ
1
This is the active-low chip select for extended 16-MHz PC-type I/O,
with address decode modified according to the state of SETCS.
nCCS
OCZ
1
NOT COMBO CHIP SELECT:
This is the
chip select signal for a PC
Combo chip.
2.1
CL-PS7500FE Pin Descriptions
(cont.)
Name
Type
Drive
Strength
Description