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| 型號(hào)： | PI7C9X7954AFDE |
| 廠商： | Pericom |
| 文件頁數(shù)： | 57/70頁 |
| 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 |
| 供應(yīng)商設(shè)備封裝： | 128-LQFP（14x14） |
| 包裝： | 托盤 |
| 安裝類型： | 表面貼裝 |
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PI7C9X7954
PCI Express Quad UART
Datasheet
Page 60 of 70
May 2013 – Revision 1.4
Pericom Semiconductor
BIT
FUNCTION
TYPE
DESCRIPTION
3
Special Character
Detect
RO
When detecting the special characters from a remote transmitter,
this bit is set to ‘1’. Otherwise, this bit is set to ‘0’.
The bit is read-clear.
If the Xoff/Special Character Interrupt is enabled, the status is
also reflected in the Interrupt Status Register (Priority Level 6).
1b: Event true
0b: Event false
Reset to 0b.
7:4
Reserved
RO
Reset to 0000b.
7.2.19. TRANSMIT INTERRUPT TRIGGER LEVEL – OFFSET 10h
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
TTL
RW
Transmitter Interrupt Trigger Level.
Reset to 00h.
7.2.20. RECEIVE INTERRUPT TRIGGER LEVEL – OFFSET 11h
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
RTL
RW
Receiver Interrupt Trigger Level.
Reset to 00h.
7.2.21. FLOW CONTROL LOW TRIGGER LEVEL – OFFSET 12h
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
FCL
RW
Automatic Flow Control Low Trigger Level.
Reset to 00h.
7.2.22. FLOW CONTROL HIGH TRIGGER LEVEL – OFFSET 13h
BIT
FUNCTION
TYPE
DESCRIPTION
7:0
FCH
RW
Automatic Flow Control High Trigger Level.
Reset to 00h.
7.2.23. CLOCK PRESCALE REGISTER – OFFSET 14h
BIT
FUNCTION
TYPE
DESCRIPTION
2:0
CPRN
RW
N number in calculating the Prescaler, which is used to generate
the Baud Rate.
Reset to 000b.
7:3
CPRM
RW
M number in calculating the Prescaler, which is used to generate
the Baud Rate.
It is recommended that the value of the CPRM be set to “00001”
or “00010”.
Reset to 00001b.
7.2.24. RECEIVE FIFO DATA COUNTER – OFFSET 15h, SFR[6] = 0
The function of this register is selected by the Special Function Register (Offset 07h) bit 6. When SFR[6] is
set to ‘1’, this register functions as the Receive FIFO Data Counter. Otherwise, it functions as the Line
13-0093
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