MPC8313ECZQADDC Freescale Semiconductor, MPC8313ECZQADDC Datasheet - Page 787

• Manufacturer Part Number: MPC8313ECZQADDC
• Description: Microprocessors - MPU 8313 REV2.2 PB ENC EXT
• Manufacturer: Freescale Semiconductor

Specifications of MPC8313ECZQADDC

• Processor Series: MPC8313E
• Core: e300
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 133 MHz
• Program Memory Size: 16 KB
• Data Ram Size: 16 KB
• Interface Type: I2C
• Mounting Style: SMD/SMT
• Package / Case: PBGA
• Number Of Programmable I/os: 32
• Number Of Timers: 4

Table 15-41
Freescale Semiconductor
16–19
20–21
22–23
0–15
Bits
24
25
26
27
PreAM RxEN User defined preamble enable for received frames. This bit is cleared by default.
PreAM TxEN User defined preamble enable for transmitted frames. This bit is cleared by default.
Preamble
I/F Mode
Length
Length
Frame
Name
check
Huge
describes the fields of the MACCFG2 register.
—
—
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
Reserved
This field determines the length in bytes of the preamble field preceding each Ethernet start-of-frame
delimiter byte. Values from 0x3 to 0xF are supported by the controller. The default value of 0x7 should
not be altered in order to guarantee reliable operation with IEEE 802.3 compliant hardware.
Reserved
This field determines the type of interface to which the MAC is connected. Its default is 00.
00 Reserved bit mode (not supported) (10 Mbps GENDEC/GPSI)
01 Nibble mode (MII) (10/100 Mbps MII/RMII)
10 Byte mode () (1000 Mbps). Reserved if neither GMII or TBI are supported.
11 Reserved
0 The MAC skips the Ethernet preamble without returning it.
1 The MAC recovers the received Ethernet preamble and passes it to the driver at the start of each
0 The MAC generates a standard Ethernet preamble.
1 If a user-defined preamble has been passed to the MAC it is transmitted instead of the standard
Huge frame enable. This bit is cleared by default.
0 Limit the length of frames received to less than or equal to the maximum frame length value
1 Frames are transmitted and received regardless of their relationship to the maximum frame length.
Note that if Huge Frame is cleared, the user must ensure that adequate buffer space is allocated for
Length check. This bit is cleared by default.
0 No length field checking is performed.
1 The MAC checks the frame’s length field on receive to ensure it matches the actual data field length.
received frame. If the preamble is less than 7 bytes, 0’s are prepended to pad it to 7 bytes. Not
applicable to or RMII 10/100 modes.
preamble. Otherwise the standard Ethernet preamble is generated. The Preamble Length field
should be left at its default setting if a user-defined preamble is transmitted. Not applicable to or
RMII 10/100 modes.
(MAXFRM[Maximum Frame]) and limit the length of frames transmitted to less than the maximum
frame length.
See
received frames. See
information.
Transmitted frames are not checked.
Receive or transmit > maximum frame length
Receive
Transmit
Receive or transmit < maximum frame length
Section 15.6.7, “Buffer
Frame type
Table 15-41. MACCFG2 Field Descriptions
Section 15.5.3.5.5, “Maximum Frame Length Register
= maximum frame length
= maximum frame length
Descriptors,” for further details of buffer descriptor bit updating.
Frame length
Description
Enhanced Three-Speed Ethernet Controllers
truncation
Packet
yes
no
no
no
Buffer descriptor
(MAXFRM),” for further
updated
yes
yes
no
no
15-69