ox16pci958 Oxford Electrical Products, ox16pci958 Datasheet - Page 38

• Manufacturer Part Number: ox16pci958
• Description: Octal Uart With Interface
• Manufacturer: Oxford Electrical Products

OXFORD SEMICONDUCTOR LTD.
Table 36, the columns have the following meanings:
DS-0022 Nov 05
I, O or B
Drv Str
CMOS / TTL
CTO
Ext Load
ITC
PU/PD
Special
Clock-to-output timings, in ns. If only one number is given, this is the maximum
I—input
O—output
B—bi-directional I/O
Output drive strength in mA
Type of voltage thresholds used; see details in the following section
External load (in pF) used to verify output timings
Input-to-clock timings, in ns, i.e. setup time
Indicates whether internal pull-up or pull-down resistors are fitted. All pull-ups
have a 100 kΩ nominal resistance, although they are not strictly ohmic in nature
Particular I/O specifications, as follows:
PCI Universal— I/O conforms to the PCI 5V signaling specification when the
VDDP pins are at 5V, and conforms to the PCI 3.3V signalling specification when
the VDDP pins are at 3.3V.
IEEE 1284 level 2— I/O conforms to the "level 2" signalling specification defined in
IEEE 1284-2000, when fitted with an external 22 Ω series resistor (all signals) and
1.2 kΩ pull-up resistors (input and bi-directional pins)
Power/power voltage— power or I/O pin is connected to the 3.3/5V I/O group used
for the PCI interface, or the 5V group used for the other I/Os
External—Free Release
OX16PCI958 DATA SHEET
Page 38