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| 型號： | PI7C9X7954AFDE |
| 廠商： | Pericom |
| 文件頁數(shù)： | 5/70頁 |
| 文件大小： | 0K |
| 描述： | IC PCIE-TO-UART BRIDGE 128LQFP |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 應(yīng)用： | PCIe至UART橋接 |
| 接口： | 高級配置電源接口（ACPI） |
| 電源電壓： | 1.8V, 3.3V |
| 封裝/外殼： | 128-LQFP 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 128-LQFP（14x14） |
| 包裝： | 托盤 |
| 安裝類型： | 表面貼裝 |
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PI7C9X7954
PCI Express Quad UART
Datasheet
Page 13 of 70
May 2013 – Revision 1.4
Pericom Semiconductor
PIN NO.
NAME
TYPE
DESCRIPTION
*58, *57,
*56, *55
DRIVER_SEL1
[3:0]
O
DRIVER_SEL1: Used to select RS-232/ RS-424/ 4-Wire RS-485/
2-Wire RS-458 Serial Port Mode for UART 1. DRIVER_SEL1 [3:0]
are output signals with weak internal pull-down resistors.
Driver Equalization Level Control (DEQ[0]): During system
initialization, DRIVER_SEL1[3] acts as the DEQ[0] pin, and it is
used to control the driver current level. By default, it is set to ‘0’
without pin strapped.
Driver Current Level Control (DTX[3:1]): During system
initialization, DRIVER_SEL1[2:0] acts as the DTX[3:1] pins, and
they are used to control the driver current level. By default, they are
set to ‘000’ without pin strapped.
62, 61, 60,
59
DRIVER_SEL2
[3:0]
O
DRIVER_SEL2: Used to select RS-232/ RS-424/ 4-Wire RS-485/
2-Wire RS-458 Serial Port Mode for UART 2. DRIVER_SEL2[3] is
an output signal with a weak internal pull-up resistor, and other
DRIVER_SEL2 signals are output signals with internal pull-down
resistors.
68, 67, 66,
65
DRIVER_SEL3
[3:0]
O
DRIVER_SEL3: Used to select RS-232/ RS-424/ 4-Wire RS-485/
2-Wire RS-458 Serial Port Mode for UART 3. DRIVER_SEL3 [3:0]
are output signals with weak internal pull-up resistors.
4.2.2.
PCI EXPRESS INTERFACE
PIN NO.
NAME
TYPE
DESCRIPTION
23, 22
TXP, TXN
O
PCI Express Serial Output Signal: Differential PCI Express
output signals.
26, 28
RXP, RXN
I
PCI Express Serial Input Signal: Differential PCI Express input
signals.
16, 18
CLKINP,
CLKINN
I
Reference Input Clock: Connects to external 100MHz differential
clock
The input clock signals must be delivered to the clock buffer cell
through an AC-coupled interface so that only the AC information of
the clock is received, converted, and buffered. It is recommended
that a 0.1uF be used in the AC-coupling.
29
RREF
I
Reference Resistor: To accurately set internal bias references, a
precision resistor must be connected between Rref and Vss. The
resistor should have a nominal value of 2.1 K and accuracy of +/-
1%
4.2.3.
SYSTEM INTERFACE
PIN NO.
NAME
TYPE
DESCRIPTION
36
PEREST_L
I
System Reset Input
13-0093
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