参数资料
| 型号： | PIC12F635T-I/MF |
| 厂商： | Microchip Technology |
| 文件页数： | 30/74页 |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 1KX14 8DFN |
| 标准包装： | 3,300 |
| 系列： | PIC® 12F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 外围设备： | 欠压检测/复位，POR，WDT |
| 输入/输出数： | 5 |
| 程序存储器容量： | 1.75KB（1K x 14） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 128 x 8 |
| RAM 容量： | 64 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2 V ~ 5.5 V |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-VDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 配用： | AC164324-ND - MODULE SKT FOR MPLAB 8DFN/16QFN XLT08DFN2-ND - SOCKET TRANSITION ICE 14DIP/8DFN AC162057-ND - MPLAB ICD 2 HEADER 14DIP XLT08DFN-ND - SOCKET TRANSITION ICE 8DFN AC164032-ND - ADAPTER PICSTART PLUS 8DFN/DIP AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC |
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Micrel, Inc.
KSZ8841-PMQL
October 2007
36
M9999-100407-1.5
The following table shows the access rules of the register.
Category
Description
bit 15
Read/Write 1 Clear (RW1C)
bit 8
Read/Write (RW)
bit 3
Read Only (RO)
bit 1 – 0
Read Write (RW)
PCI Control & Status Registers
The PCI CSR registers are all 32 bit in Little Endian format. For PCI register Read cycle, the KSZ8841-PMQL allows
any different combination of CBEN. For PCI register bus cycles, only byte, word(16-bit), or Dword(32-bit) accesses are
allowed. Any other combinations are illegal, and will be target aborted.
All other registers not included below are reserved.
MAC DMA Transmit Control Register (MDTXC Offset 0x0000)
The MAC DMA transmit control register establishes the transmit operating modes and commands for the port. This
register should be one of the last CSRs to be written as part of the transmit initialization.
The following table shows the register bit fields.
Bit
Default
Read/
Write
Description
31-30
-
RO
Reserved
29 - 24
0x00
RW
MTBS DMA Transmit Burst Size
This field indicates the maximum number of words to be transferred in one
DMA transaction. If reset, the MAC DMA burst size is limited only by the
amount of data stored in the transmit buffer before issuing a bus request.
The MTBS can be programmed with permissible values 0,1, 2, 4, 8, 16, or
32.
After reset, the MTBS default is 0, i.e. unlimited.
23 - 19
0x00
RO
Reserved
18
0
RW
MTUCG MAC Transmit UDP Checksum Generate
When set, the KSZ8841-PMQL will generate correct UDP checksum for
outgoing UDP/IP frames at port.
When this bit is set, ADD CRC should also turn on.
17
0
RW
MTTCG MAC Transmit TCP Checksum Generate
When set, the KSZ8841-PMQL will generate correct TCP checksum for
outgoing TCP/IP frames at port.
When this bit is set, ADD CRC should also turn on.
16
0
RW
MTICG MAC Transmit IP Checksum Generate
When set, the KSZ8841-PMQL will generate correct IP checksum for
outgoing IP frames at port.
When this bit is set, ADD CRC should also turn on.
15 - 10
0x00
RO
Reserved
9
0
RW
MTFCE MAC Transmit Flow Control Enable
When this bit is set and the KSZ8841-PMQL is in Full Duplex mode, flow
control is enabled and the KSZ8841-PMQL will transmit a PAUSE frame
when the Receive Buffer capacity has reached a level that may cause the
buffer to overflow.
When this bit is set and the KSZ8841-PMQL is in Half Duplex mode, back-
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