MC68340AG16E Freescale Semiconductor, MC68340AG16E Datasheet - Page 299
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MC68340AG16E
Manufacturer Part Number
MC68340AG16E
Description
IC MPU 32BIT 16MHZ 144-LQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68340FE25E.pdf
(441 pages)
Specifications of MC68340AG16E
Processor Type
M683xx 32-Bit
Speed
16MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
144-LQFP
Controller Family/series
68K
Core Size
32 Bit
No. Of I/o's
16
Cpu Speed
16MHz
No. Of Timers
2
Embedded Interface Type
UART
Digital Ic Case Style
LQFP
Rohs Compliant
Yes
Processor Series
M683xx
Core
CPU32
Maximum Clock Frequency
16 MHz
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
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currently active interrupt conditions. The interrupt enable register (IER) is programmable
to mask any events that can cause an interrupt.
7.1.5 Comparison of Serial Module to MC68681
The serial module is code compatible with the MC68681 with some modifications. The
following paragraphs describe the differences.
The programming model is slightly altered. The supervisor/user block in the MC68340
closely follows the MC68681. The supervisor-only block has the following changes:
The timer/counter is eliminated as well as all associated command and status registers.
Only certain output port pins are available.
There are no IP pins on the MC68340.
RxRTS and TxRTS are more automated on the MC68340.
The XTAL_RDY bit in the ISR should be polled until it is cleared to prevent an unstable
frequency from being applied to the baud rate generator. The following code is an
example:
7.2 SERIAL MODULE SIGNAL DEFINITIONS
The following paragraphs contain a brief description of the serial module signals. Figure 7-
2 shows both the external and internal signal groups.
7-4
• The interrupt vector register is moved from supervisor/user to supervisor only at a
• MR2A and MR2B are moved from a hidden address location to a location at the
new address.
bottom of the programming model.
if (XTAL_RDY==0)
else
begin
end
begin
end
write CSR
wait
jump loop
The terms assertion and negation are used throughout this
section to avoid confusion when dealing with a mixture of
active-low and active-high signals. The term assert or assertion
indicates that a signal is active or true, independent of the level
represented by a high or low voltage. The term negate or
negation indicates that a signal is inactive or false.
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68340 USER’S MANUAL
Go to: www.freescale.com
NOTE
MOTOROLA
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