PI7C9X7952AFDE Pericom Semiconductor, PI7C9X7952AFDE Datasheet - Page 59

• Manufacturer Part Number: PI7C9X7952AFDE
• Description: IC PCIE-TO-UART BRIDGE 128LQFP
• Manufacturer: Pericom Semiconductor

Specifications of PI7C9X7952AFDE

• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Status Register Counter.
7.2.25. LINE STATUS REGISTER COUNTER – OFFSET 15h, SFR[6] = 1
7.2.26. TRANSMIT FIFO DATA COUNTER – OFFSET 16h, SFR[7] = 1
The function of this register is selected by the Special Function Register (Offset 07h) bit 7. When SFR[7] is
set to ‘1’, this register functions as the Transmit FIFO Data Counter. Otherwise, it functions as the Sample
Clock Register.
7.2.27. SAMPLE CLOCK REGISTER – OFFSET 16h, SFR[7] = 0
7.2.28. GLOBAL LINE STATUS REGISTER – OFFSET 17h
September 2009 – Revision 1.3
Pericom Semiconductor
BIT
7:0
BIT
7:0
BIT
7:0
BIT
3:0
7:4
BIT
0
1
FUNCTION
Receive FIFO Data
Counter
FUNCTION
Line Status
Register Counter
FUNCTION
Transmit FIFO
Data Counter
FUNCTION
Sample Clock
Reserved
FUNCTION
RX Data Available
RX FIFO Overrun
09-0087
RO
TYPE
RO
RO
RW
RO
RO
RO
TYPE
TYPE
TYPE
TYPE
Page 59 of 68
DESCRIPTION
The Receive FIFO Data Counter indicates the amount of data in
the Receive FIFO.
Reset to 00h.
DESCRIPTION
The Line Status Register Counter indicates the amount of data in
the LSR.
Reset to 00h.
DESCRIPTION
The Transmit FIFO Data Counter indicates the amount of data in
the Transmit FIFO.
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.
DESCRIPTION
0b: No data in the receive FIFO
1b: Data in the receive FIFO
Reset to 0b.
0b: No overrun error
1b: Overrun error
Reset to 0b.
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® Dual UART
1010b: SC = 6
1011b: SC = 5
1100b: SC = 4
Other settings are
reserved.
PI7C9X7952
Datasheet