XR17V352 Datasheet, PDF (5/64 Pages) Exar Corporation – HIGH PERFORMANCE DUAL PCI EXPRESS UART

REV. P1.0.1
PIN DESCRIPTIONS
NAME
EEDI
PIN #
J8
EEDO
L9
JTAG SIGNALS
TRESET
L6
TCK
K6
TMS
J6
TDI
L7
TDO
K7
BUCK REGULATOR SIGNALS
ENABLE
C10
LX
A9
LX
A10
FB
C7
PWRGD
D9
ANCILLARY SIGNALS
RESET#
J5
TMRCK
A6
EN485#
C6
ENIR#
B6
TEST0
TEST1
TEST2
TEST3
TEST4#
TEST5
VCC33
VCC33A
VCC33P
D2
B7
A7
D10
E10
E9
D5, E8, H7
H3
B9, C9
PRELIMINARY
XR17V352
HIGH PERFORMANCE DUAL PCI EXPRESS UART
TYPE
DESCRIPTION
O Write data to EEPROM device. It is manually accessible thru the Configura-
tion Register REGB.
I Read data from EEPROM device. It is manually accessible thru the Configu-
ration Register REGB.
I JTAG Test Reset
I JTAG Test Clock
I JTAG Test Mode Select
I JTAG Data Input
O JTAG Data Output
I Connect to VCC to enable buck regulator. Connect to GND to disable buck
regulator.
O Connect these two signals together to external 4.7uH inductor.
O
I Connect this signal to other end of external 4.7uH inductor. 47uF capacitor to
GND is also required on this pin.
O Indicates that 1.2V core has been powered up.
I System reset (active low). In normal operation, this signal should be HIGH.
I 16-bit timer/counter external clock input.
I Auto RS-485 mode enable (active low). This pin is sampled during power up,
following a hardware reset (RST#) or soft reset (register RESET). It can be
used to start up both UARTs in the Auto RS-485 Half-Duplex Direction control
mode. The sampled logic state is transferred to FCTR bit-5 in the UART
channel.
I Infrared mode enable (active low). This pin is sampled during power up, fol-
lowing a hardware reset (RST#) or soft-reset (register RESET). It can be
used to start up both UARTs in the infrared mode. The sampled logic state is
transferred to MCR bit-6 in the UART.
I Factory Test Modes. For normal operation, connect to GND.
I
I
I
I Factory Test Mode 4. For normal operation, connect to VCC.
I/O Factory Test I/O. For normal operation, connect to pull-down resistor.
Pwr 3.3V I/O power supply.
Pwr 3.3V analog PHY power supply. A ferrite bead is recommended on this pin.
Pwr 3.3V power supply voltage for output stage of buck regulator.
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