MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 366
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MCF5272VF66
Manufacturer Part Number
MCF5272VF66
Description
Manufacturer
Freescale
Datasheet
1.MCF5272VF66.pdf
(544 pages)
Specifications of MCF5272VF66
Family Name
MCF5xxx
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
3.3V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
196
Package Type
MA-BGA
Lead Free Status / RoHS Status
Not Compliant
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UART Modules
16.3.2
UART mode registers 2 (UMR2n) control UART module configuration. UMR2n can be read or written
when the mode register pointer points to it, which occurs after any access to UMR1n. UMR2n accesses do
not update the pointer.
Table 16-3
16-6
Bits
7–6
3–0
5
4
Address
Reset
TxCTS Transmitter clear-to-send. If both TxCTS and TxRTS are enabled, TxCTS controls the operation of the
TxRTS Transmitter ready-to-send. Controls negation of RTS to automatically terminate a message transmission when
Name
Field
R/W
CM
SB
describes UMR2n fields.
UART Mode Register 2 (UMR2n)
Channel mode. Selects a channel mode.
00 Normal
01 Automatic echo
10 Local loop-back
11 Remote loop-back
the transmitter is disabled after completion of a transmission. Attempting to program a receiver and transmitter
in the same channel for RTS control is not permitted and disables RTS control for both.
0 The transmitter has no effect on RTS.
1 When the transmitter is disabled after transmission completes, setting this bit automatically clears
transmitter.
0 CTS has no effect on the transmitter.
1 Enables clear-to-send operation. The transmitter checks the state of CTS each time it is ready to send a
Stop-bit length control. Selects the length of the stop bit appended to the transmitted character. Stop-bit lengths
of 9/16th to 2 bits are programmable for 6–8 bit characters. Lengths of 1 1/16th to 2 bits are programmable for
5-bit characters. In all cases, the receiver checks only for a high condition at the center of the first stop-bit
position, that is, one bit time after the last data bit or after the parity bit, if parity is enabled. If an external 1x
clock is used for the transmitter, clearing bit 3 selects one stop bit and setting bit 3 selects 2 stop bits for
transmission.
UOP[RTS] one bit time after any characters in the channel transmitter shift and holding registers are
completely sent, including the programmed number of stop bits.
character. If CTS is asserted, the character is sent; if it is negated, the channel TxD remains in the high state
and transmission is delayed until CTS is asserted. Changes in CTS as a character is being sent do not affect
its transmission.
7
0000
0001
0010
0011
SB
CM
MBAR + 0x100, 0x140. After UMR1n is read or written, the pointer points to UMR2n.
MCF5272 ColdFire
5 Bits
1.063
1.125
1.188
1.250
6
Figure 16-3. UART Mode Register 2 (UMR2n)
6–8 Bits
0.563
0.625
0.688
0.750
Table 16-3. UMR2n Field Descriptions
TxRTS
®
5
Integrated Microprocessor User’s Manual, Rev. 3
0100
0101
0110
0111
SB
TxCTS
Section 16.5.3, “Looping
5 Bits
1.313
1.375
1.438
1.500
4
0000_0000
Description
R/W
6–8 Bits
0.813
0.875
0.938
1.000
3
1000
1001
1010
1011
SB
Modes,” describes individual modes.
5–8 Bits
1.563
1.625
1.688
1.750
SB
Freescale Semiconductor
1100
1101
1110
1111
SB
5–8 Bits
1.813
1.875
1.938
2.000
0
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