MC68EN360AI25VL Freescale, MC68EN360AI25VL Datasheet - Page 458
MC68EN360AI25VL
Manufacturer Part Number
MC68EN360AI25VL
Description
Manufacturer
Freescale
Datasheet
1.MC68EN360AI25VL.pdf
(962 pages)
Specifications of MC68EN360AI25VL
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
25MHz
Instruction Set Architecture
RISC
Operating Supply Voltage (max)
3.3V
Operating Supply Voltage (min)
2.7V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
240
Package Type
FQFP
Lead Free Status / RoHS Status
Compliant
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MC68EN360AI25VL
Manufacturer:
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Serial Communication Controllers (SCCs)
If the CD pin is programmed to envelope the data, the CD pin must remain asserted during
frame transmission, or a CD lost error occurs. The negation of the CD pin terminates recep-
tion. If the CDS bit in the GSMR is zero, the CD pin must be sampled by the SCC before a
CD lost is recognized. Otherwise, the negation of CD immediately causes the CD lost con-
dition.
7.10.11.2 ASYNCHRONOUS PROTOCOLS. The RTS pin is asserted when the SCC data
is loaded into the transmit FIFO and a falling transmit clock occurs. The CD and CTS pins
may be used to control reception and transmission in the same manner as the synchronous
protocols. The first bit of data transmission in an asynchronous protocol is the start bit of the
first character. In addition, the UART protocol has an option for CTS flow control as
described in 7.10.16 UART Controller.
7-134
(INPUT)
NOTES:
(INPUT)
NOTES:
(INPUT)
(INPUT)
RCLK
1. CDS = 0 in GSMR; CDP = 0.
2. If CD is negated prior to the last bit of the receive frame, CD LOST is signaled in the frame BD.
3. If CDP = 1, CD LOST cannot occur, and CD negation has no effect on reception.
RXD
RCLK
3. If CDP = 1, CD lost cannot occur, and CD negation has no effect on reception.
CD
1. CDS = 1 in GSMR; CDP = 0.
2. If CD is negated prior to the last bit of the receive frame, CD lost is signaled in the frame BD.
RXD
CD
Figure 7-42. Using CD to Control Reception of Synchronous Protocols
If the CDS bit in GSMR is set, all CD transitions must occur while
the receive clock is low.
Freescale Semiconductor, Inc.
CD ASSERTION IMMEDIATELY
GATES RECEPTION
FIRST BIT OF DATA IN FRAME
FIRST BIT OF FRAME DATA
For More Information On This Product,
CD SAMPLED LOW HERE
MC68360 USER’S MANUAL
Go to: www.freescale.com
NOTE
CD NEGATION IMMEDIATELY
LAST BIT OF FRAME DATA
LAST BIT OF FRAME DATA
CD SAMPLED HIGH HERE
HALTS RECEPTION
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