PI7C9X7954AFDE Pericom Semiconductor, PI7C9X7954AFDE Datasheet - Page 3

• 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

REVISION HISTORY
Date
10/31/07
12/20/2007
4/22/08
8/13/08
11/25/08
3/6/09
4/21/09
9/24/09
September 2009 – Revision 1.3
Pericom Semiconductor
Revision Number
0.1
0.2
0.3
0.4
1.0
1.1
1.2
1.3
09-0088
Description
Preliminary Datasheet
Fixed the diagrams
Corrected Chapter 4.2 Pin Description (RREF, GPIO[7])
Updated Chapter 6 PCI Express Registers(6.2.42 [3], 6.2.36 UART Driver
Setting, 6.2.41 GPIO Control Register )
Revised Chapter 7.1 Registers in I/O Mode
Updated Chapter 11 Ordering Info
Updated Chapter 4 Pin Assignment (description for shared pins added,
MODE_SEL changed to DRIVER_SEL)
Updated Chapter 6 PCI Express Register Description
Updated Chapter 7 UART Register Description
Updated Chapter 8 EEPROM Interface
Updated 1 Features (Clock prescaler, Data frame size, Power Dissipation)
Corrected 3 General Description
Updated 4 Pin Assignment (description for shared pins added, MODE_SEL
changed to DRIVER_SEL, VAUX changed to VDDCAUX, WAKEUP_L,
CLKINP, CLKINN)
Added 5.2.4 Mode Selection, 5.2.5 450/550 Mode, 5.2.6 Enhanced 550 Mode,
5.2.7 Enhanced 950 Mode
Corrected 5.2.8 Transmit and Receive FIFOs, 5.2.9 Automated Flow Control
Modified 5.2.12 Baud Rate Generation
Updated 6 PCI Express Register Description (6.2.36, 6.2.42)
Updated Format (6.2.20, 6.2.36, 6.2.54, 6.2.55, 6.2.57)
Updated Chapter 7 UART Register Description (7.1.6 LCR Bit[5:0], 7.1.7 MCR
Bit[5] and Bit[7], 7.1.9 MSR Bit[3:0], 7.2.6 LCR Bit[5:0], 7.2.7 MCR Bit[5] and
Bit[7], 7.2.9 MSR Bit[3:0], 7.2.11 DLL, 7.2.12 DLH, 7.2.13 EFR, 7.2.18 ACR
Bit[7:2], 7.2.23 CPRM)
Updated Chapter 8.3 EEPROM Space Address Map And Description (00h, 0Ah,
40h)
Added Chapter 9 Electrical Specification
Corrected 9.2 DC Specification
Updated 9.3 AC Specification
Added 10 Clock Scheme
Updated Chapter 1 Features (added Industrial Temperature Range)
Updated 9.1 Absolute Maximum Ratings: Ambient Temperature with power
applied
Updated 7.1.13 Sample Clock Register and 7.2.27 Sample Clock Register
Updated Chapter 12 Ordering Information
Removed “Preliminary” and “Confidential” references
Corrected Figure 3-1 PI7C9X7954 Block Diagram (SYN_UART_CLK removed)
Corrected Section 4.2.1 UART Interface (SYNCLK_IN_EN and
SYN_UART_CLK removed)
Corrected Figure 5-2 Internal Loopback in PI7C7954
Corrected Figure 5-3 Crystal Oscillator as the Clock Source (14.7456 MHz)
Corrected Section 7.1.7 Modem Control Register (Bit[5]), 7.1.10 Special
Function Register (Bit[4]), 7.2.7 Modem Control Register (Bit[5]), 7.2.10
Special Function Register (Bit[4]), 7.2.29 Receive FIFO Data Registers, 7.2.30
Transmit FIFO Data Register, 7.2.31
Added internal pull-up and pull-down information to UART Interface, System
Interface, Test Signal, and EEPROM pins in Section 4.
Updated Figure 5-3 Crystal Oscillator as the Clock Source
Updated Section 6.2.24 Message Signaled Interrupt (MSI) Next Item Pointer 8Ch
Added Section 6.2.25 Message Address Register – Offset 90h
Added Section 6.2.26 Message Upper Address Register – Offset 94h
Added Section 6.2.27 Message Data Register – Offset 98h
Page 3 of 70
PCI Express® Quad UART
PI7C9X7954
Datasheet