PI7C9X7954AFDE Pericom Semiconductor, PI7C9X7954AFDE Datasheet - Page 4

• Manufacturer Part Number: PI7C9X7954AFDE
• Description: IC PCIE-TO-UART BRIDGE 128LQFP
• Manufacturer: Pericom Semiconductor

Specifications of PI7C9X7954AFDE

• Applications: PCIe-to-Uart Bridge
• Interface: Advanced Configuration Power Interface (ACPI)
• Voltage - Supply: 1.8V, 3.3V
• Package / Case: 128-LQFP
• Mounting Type: Surface Mount
• Transmitter And Receiver Fifo Counter: Yes
• Package Type: LQFP
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
1.
2.
3.
4.
5.
6.
September 2009 – Revision 1.3
Pericom Semiconductor
4.1.
4.2.
5.1.
5.2.
6.1.
6.2.
FEATURES ............................................................................................................................................9
APPLICATIONS ...................................................................................................................................9
GENERAL DESCRIPTION ...............................................................................................................10
PIN ASSIGNMENT.............................................................................................................................11
4.2.1.
4.2.2.
4.2.3.
4.2.4.
4.2.5.
4.2.6.
FUNCTIONAL DESCRIPTION........................................................................................................17
5.1.1.
5.1.2.
5.2.1.
5.2.2.
5.2.3.
5.2.4.
5.2.5.
5.2.6.
5.2.7.
5.2.8.
5.2.9.
5.2.10.
5.2.11.
5.2.12.
5.2.13.
PCI EXPRESS REGISTER DESCRIPTION ...................................................................................25
6.2.1.
6.2.2.
6.2.3.
6.2.4.
6.2.5.
6.2.6.
6.2.7.
6.2.8.
6.2.9.
6.2.10.
6.2.11.
6.2.12.
6.2.13.
PIN LIST
PIN DESCRIPTION ......................................................................................................................12
CONFIGURATION SPACE ..........................................................................................................17
DEVICE OPERATION..................................................................................................................18
REGISTER TYPES .......................................................................................................................25
CONFIGURATION REGISTERS.................................................................................................25
UART INTERFACE................................................................................................................12
PCI EXPRESS INTERFACE ..................................................................................................13
SYSTEM INTERFACE............................................................................................................13
TEST SIGNALS......................................................................................................................14
EEPROM INTERFACE..........................................................................................................15
POWER PINS ........................................................................................................................16
PCI Express Configuration Space .........................................................................................17
UART Configuration Space ...................................................................................................17
Configuration Access.............................................................................................................18
I/O Reads/Writes....................................................................................................................18
Memory Reads/Writes............................................................................................................18
Mode Selection ......................................................................................................................19
450/550 Mode ........................................................................................................................19
Enhanced 550 Mode ..............................................................................................................19
Enhanced 950 Mode ..............................................................................................................19
Transmit and Receive FIFOs .................................................................................................19
Automated Flow Control........................................................................................................21
Internal Loopback..................................................................................................................22
Crystal Oscillator ..................................................................................................................23
Baud Rate Generation ...........................................................................................................24
Power Management ...............................................................................................................24
VENDOR ID REGISTER – OFFSET 00h ..............................................................................26
DEVICE ID REGISTER – OFFSET 00h................................................................................26
COMMAND REGISTER – OFFSET 04h...............................................................................26
STATUS REGISTER – OFFSET 04h......................................................................................27
REVISION ID REGISTER – OFFSET 08h ............................................................................27
CLASS CODE REGISTER – OFFSET 08h............................................................................27
CACHE LINE REGISTER – OFFSET 0Ch............................................................................28
MASTER LATENCY TIMER REGISTER – OFFSET 0Ch .....................................................28
HEADER TYPE REGISTER – OFFSET 0Ch.........................................................................28
BASE ADDRESS REGISTER 0 – OFFSET 10h.....................................................................28
BASE ADDRESS REGISTER 1 – OFFSET 14h.....................................................................28
SUBSYSTEM VENDOR REGISTER – OFFSET 2Ch ............................................................28
SUBSYSTEM ID REGISTER – OFFSET 2Ch........................................................................28
OF
128-PIN LQFP..........................................................................................................11
09-0088
Page 4 of 70
PCI Express® Quad UART
PI7C9X7954
Datasheet