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參數(shù)資料
| 型號(hào)： | PI7C9X7954AFDE |
| 廠商： | Pericom |
| 文件頁(yè)數(shù)： | 58/70頁(yè) |
| 文件大?。?/td> | 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(jí)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(pán) |
| 供應(yīng)商設(shè)備封裝： | 128-LQFP（14x14） |
| 包裝： | 托盤(pán) |
| 安裝類型： | 表面貼裝 |
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PI7C9X7954
PCI Express Quad UART
Datasheet
Page 61 of 70
May 2013 – Revision 1.4
Pericom Semiconductor
Status Register Counter.
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
Receive FIFO Data
Counter
RO
The Receive FIFO Data Counter indicates the amount of data in
the Receive FIFO.
Reset to 00h.
7.2.25. LINE STATUS REGISTER COUNTER – OFFSET 15h, SFR[6] = 1
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
Line Status
Register Counter
RO
The Line Status Register Counter indicates the amount of data in
the LSR.
Reset to 00h.
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.
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
Transmit FIFO
Data Counter
RO
The Transmit FIFO Data Counter indicates the amount of data in
the Transmit FIFO.
Reset to 00h.
7.2.27. SAMPLE CLOCK REGISTER – OFFSET 16h, SFR[7] = 0
BIT
FUNCTION
TYPE
DESCRIPTION
3:0
Sample Clock
RW
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
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
1010b: SC = 6
1011b: SC = 5
1100b: SC = 4
Other settings are
reserved.
Reset to 0h.
7:4
Reserved
RO
Reset to 0h.
7.2.28. GLOBAL LINE STATUS REGISTER – OFFSET 17h
BIT
FUNCTION
TYPE
DESCRIPTION
0
RX Data Available
RO
0b: No data in the receive FIFO
1b: Data in the receive FIFO
Reset to 0b.
1
RX FIFO Overrun
RO
0b: No overrun error
1b: Overrun error
Reset to 0b.
13-0093
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