MC68302EH16C Freescale Semiconductor, MC68302EH16C Datasheet - Page 247
MC68302EH16C
Manufacturer Part Number
MC68302EH16C
Description
IC MPU MULTI-PROTOCOL 132-PQFP
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68302AG20C.pdf
(4 pages)
2.MC68302AG20C.pdf
(2 pages)
3.MC68302AG20C.pdf
(13 pages)
4.MC68302EH16C.pdf
(481 pages)
Specifications of MC68302EH16C
Processor Type
M683xx 32-Bit
Speed
16MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
132-MQFP, 132-PQFP
Controller Family/series
68K
Core Size
32 Bit
Ram Memory Size
1152Byte
Cpu Speed
16MHz
No. Of Timers
3
Embedded Interface Type
SCP, TDM
Digital Ic Case Style
PQFP
Rohs Compliant
Yes
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
16MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
5V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
132
Package Type
PQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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- MC68302AG20C PDF datasheet
- MC68302AG20C PDF datasheet #2
- MC68302AG20C PDF datasheet #3
- MC68302EH16C PDF datasheet #4
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- Download datasheet (2Mb)
transparent synchronization. Transparent synchronization gives the user bit-level control
over when the transmission and reception can begin.
The method of synchronization is controlled by the DIAG1–DIAG0 bits in the SCM, the EX-
SYN bit in the SCM, and, in some cases, the data synchronization register (DSR). The re-
sulting timing is dependent on the physical interface chosen.
Five ways exist to achieve transparent synchronization.
MOTOROLA
1. With the physical interface in the NMSI mode, the SCC may be configured with the EX-
2. With the physical interface in NMSI mode, the SCC may be configured with the EX-
3. If case 2 is used but the DIAG1–DIAG0 bits are set to normal operation, then the nor-
4. With the physical interface configured for PCM highway mode, the SCC may be con-
SYN bit set, and the DIAG1–DIAG0 bits set to software operation. In this case, the
CTS pin is ignored, and the CD pin is used to control both transmission and reception.
For the transmitter, once RTS is asserted and the transmitter samples CD as low, the
transmission will begin after a fixed 6.5 transmit clock delay. For the receiver, the first
valid bit of data received occurs one bit prior to the receive clock that sampled CD as
low. Note that CD is sampled on a rising TCLK for the transmitter and a rising RCLK
for the receiver.
Once CD is sampled as low by the receiver and transmitter, further toggling of CD will
have no effect since synchronization has already been achieved.
SYN bit cleared and the DIAG1–DIAG0 bits set to software operation. For the trans-
mitter, the transmission will begin without any synchronization. For the receiver,
reception will begin as soon as the receive data pattern matches the SYN1–SYN2 pat-
tern programmed into the DSR. Thus, the receiver uses an in-line synchronization
method.
mal operation characteristics as described in the SCM register also apply. The trans-
mitter will be controlled by the CTS pin, and the receiver will wait for the SYN1–SYN2
pattern once the CD pin is detected as low.
figured with the EXSYN bit set and the DIAG1–DIAG0 bits set to either software oper-
ation or normal operation. In this case, the L1SY1–L1SY0 pins carry out the
synchronization. For the transmitter, once data is preloaded into the transmit FIFO, the
rising edge of the L1SY1–L1SY0 pins will cause a transmission to occur. This trans-
mission will be comprised of one leading $FF byte, followed by the first bit of the trans-
mit buffer. For the receiver, reception will begin at the beginning of a time slot.
See D.8 Using the MC68302 Transparent Mode for timing dia-
grams and additional details concerning mode.
In cases 2 and 3 above, the SYN2 character is written into the
receive data buffer.
MC68302 USER’S MANUAL
NOTE
NOTE
Communications Processor (CP)
4-127
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