PI7C9X7954AFDE Pericom Semiconductor, PI7C9X7954AFDE Datasheet - Page 50

• 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

7.1.11. DIVISOR LATCH LOW REGISTER – OFFSET 00h, LCR[7] = 1
7.1.12. DIVISOR LATCH HIGH REGISTER – OFFSET 01h, LCR[7] = 1
7.1.13. SAMPLE CLOCK REGISTER – OFFSET 02h, LCR[7] = 1
September 2009 – Revision 1.3
Pericom Semiconductor
BIT
5
6
7
7:6
BIT
7:0
BIT
7:0
BIT
3:0
7:4
FUNCTION
950 Mode
RFD / LSR
Counter Select
TFD / SCR Select
Reserved
FUNCTION
Divisor Low
FUNCTION
Divisor High
FUNCTION
Sample Clock
Reserve
09-0088
RW
RW
RW
RW
RW
RW
TYPE
RW
R
TYPE
TYPE
TYPE
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DESCRIPTION
1b: Enables 950 mode
0b: Non-950 mode
Reset to 0b.
1b: OFFSET 15 bit[7:0] acts as the Line Status Register Counter
0b: OFFSET 15 bit[7:0] acts as the Receive FIFO Data Counter
Reset to 0b.
1b: OFFSET 16 bit[7:0] acts as the Transmit FIFO Data Counter
0b: OFFSET 16 bit[7:0] acts as the Sample Clock Register
Reset to 0b.
Reset to 00b.
DESCRIPTION
Lower-part of the divisor register
Reset to 00h.
DESCRIPTION
Higher-part of the divisor register
Reset to 00h.
DESCRIPTION
This register determines the Sample Clock value (SC) used in
the Baud Rate Generator. Please refer to 5.2.12 Baud Rate
Generation for more detail
Reset to 0h.
Reset to 0h.
0000b: SC = 16
0001b: SC = 15
0010b: SC = 14
0011b: SC = 13
0100b: SC = 12
0101b: SC = 11
0110b: SC = 10
0111b: SC = 9
1000b: SC = 8
1001b: SC = 7
PCI Express® Quad UART
1010b: SC = 6
1011b: SC = 5
1100b: SC = 4
Other settings are
reserved.
PI7C9X7954
Datasheet