MC68EN360AI25VL Freescale, MC68EN360AI25VL Datasheet - Page 629
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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7.11.13 SMC Interrupt Handling
The following list describes what would normally occur within an interrupt handler for the
SMC.
7.11.14 SMC as a GCI Controller
The SMC can be used to control the C/I and to monitor channels of the GCI frame. When
using the SCIT configuration of GCI, one SMC can handle SCIT channel 0, and the other
SMC can handle SCIT channel 1. The main features are as follows:
7. Write $FF to the SMCE to clear any previous events.
8. Write $13 to the SMCM to enable all possible SMC interrupts.
9. Write $00000010 to the CIMR to allow SMC1 to generate a system interrupt. (The
10. Write $3830 to SMCMR to configure 8-bit characters, non-reversed data, and normal
11. Write $3833 to SMCMR to enable the SMC transmitter and receiver. This additional
1. Once an interrupt occurs, read the SMCE to see which sources have caused inter-
2. Process the Tx BD to reuse it if the TX bit was set in SMCE. Extract data from the Rx
3. Clear the SMC1 bit in the CISR.
4. Execute the RTE instruction.
• Each SMC Channel Supports the C/I and Monitor Channels of the GCI (IOM-2) in ISDN
• Two SMCs Support the Two Sets of C/I and Monitor Channels in SCIT Channel 0 and
• Full-Duplex Operation
• Local Loopback and Echo Capability for Testing
Applications
Channel 1
contains five 8-bit characters. Write $B000 to Tx_BD_Status. Write $0005 to
Tx_BD_Length. Write $00002000 to Tx_BD_Pointer.
CICR should also be initialized.)
operation (not loopback). Notice that the transmitter and receiver have not been
enabled yet.
write ensures that the TEN and REN bits will be enabled last.
rupts. The SMCE bits would normally be cleared at this time.
BD if the RX bit was set in SMCE. To transmit another buffer, simply set the Tx BD R-
bit.
After 5 bytes have been transmitted, the Tx BD is closed. Addi-
tionally, the receive buffer is closed after 16 bytes have been re-
ceived. Any additional receive data beyond 16 bytes will cause
a busy (out-of-buffers) condition since only one Rx BD was pre-
pared.
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68360 USER’S MANUAL
Go to: www.freescale.com
NOTE
Serial Management Controllers (SMCs)
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