XR17C158 Exar Corporation, XR17C158 Datasheet - Page 6

• Manufacturer Part Number: XR17C158
• Description: Eight-channel Pci-based (UART)
• Manufacturer: Exar Corporation

PRELIMINARY
Pin Description
N
OD=Output Open Drain.
OTE
TMRCK
TEST#
XTAL1
XTAL2
: Pin type: I=Input, O=Output, IO= Input/output,
EEDO
EECS
N
EEDI
ENIR
GND
VCC
AME
4,19,34,45,64,
5,20,35,46,63,
90,112,137
89,136
P
109
115
114
113
110
111
69
70
IN
#
T
YPE
O
O
O
I
I
I
I
I
Chip select to a EEPROM device like 93C46. It is manually selectable thru the
Configuration Register REGB.
Write data to EEPROM device. It is manually accessible thru the Configura-
tion Register REGB.
Read data from EEPROM device. It is manually accessible thru the Configu-
ration Register REGB.
Crystal or external clock input.
Crystal or buffered clock output.
16-bit timer/counter external clock input.
Infrared mode enable (active high). Start up all 8 UARTs in infrared mode
upon power up or reset.
Factory Test. Connect to VCC for normal operation.
+5V (PCI Compliance) or +3.3V supply with 5V input tolerant.
Power supply common, ground.
6
PCI BUS OCTAL UART
D
ESCRIPTION
XR17C158
REV. 1.0.0