MCF5272VF66 Freescale Semiconductor, MCF5272VF66 Datasheet - Page 239
![IC MPU 32BIT 66MHZ 196-MAPBGA](/photos/13/94/139412/mcf5272vf66_sml.jpg)
MCF5272VF66
Manufacturer Part Number
MCF5272VF66
Description
IC MPU 32BIT 66MHZ 196-MAPBGA
Manufacturer
Freescale Semiconductor
Series
MCF527xr
Specifications of MCF5272VF66
Core Processor
Coldfire V2
Core Size
32-Bit
Speed
66MHz
Connectivity
EBI/EMI, Ethernet, I²C, SPI, UART/USART, USB
Peripherals
DMA, WDT
Number Of I /o
32
Program Memory Size
16KB (4K x 32)
Program Memory Type
ROM
Ram Size
1K x 32
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
196-MAPBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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11.5.11 Transmit FIFO Watermark (TFWR)
The TFWR register, shown in
before transmission of a frame can begin. Setting TFWR to larger values reduces the risk of transmit FIFO
underrun due to system bus latency.
Table 11-18
Freescale Semiconductor
31–2
Bits
1–0
Reset
Reset
Field
Field
Addr
R/W
R/W
describes the TFWR fields.
X_WMRK
31
15
Name
—
MCF5272 ColdFire
Reserved, should be cleared.
Transmit FIFO watermark. Frame transmission begins when the number of bytes selected by this
field are written into the transmit FIFO, if an end of frame has been written to the FIFO, or if the
FIFO is full before the selected number of bytes are written. The options are:
0X 64 bytes written to transmit FIFO
10 128 bytes written to transmit FIFO
11 192 bytes written to transmit FIFO
Figure 11-15. Transmit FIFO Watermark (TFWR)
Figure
Table 11-18. TFWR Field Descriptions
11-15, controls the amount of data required in the transmit FIFO
®
Integrated Microprocessor User’s Manual, Rev. 3
0000_0000_0000_00
0000_0000_0000_0000
—
MBAR + 0x8E4
Read/Write
Read/Write
—
Description
2
X_WMRK
1
Ethernet Module
00
16
0
11-21
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