MC68340AG16VE Freescale Semiconductor, MC68340AG16VE Datasheet - Page 303

• Manufacturer Part Number: MC68340AG16VE
• Description: IC MPU 32BIT 16MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68340AG16VE

• Processor Type: M683xx 32-Bit
• Speed: 16MHz
• Voltage: 3.3V
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

7.3 OPERATION
The following paragraphs describe the operation of the baud rate generator, transmitter
and receiver, and other functional operating modes of the serial module.
7.3.1 Baud Rate Generator
The baud rate generator consists of a crystal oscillator, baud rate generator, and clock
selectors (see Figure 7-3). The crystal oscillator operates directly from a 3.6864-MHz
crystal or from an external clock of the same frequency. The SCLK input bypasses the
baud rate generator and provides a synchronous clock mode of operation when used as a
divide-by-1 clock and an asynchronous clock mode when used as a divide-by-16 clock.
The clock is selected by programming the clock-select register (CSR) for each channel.
7.3.2 Transmitter and Receiver Operating Modes
The functional block diagram of the transmitter and receiver, including command and
operating registers, is shown in Figure 7-4. The paragraphs that follow contain
descriptions for both these functions in reference to this diagram. For detailed register
information, refer to 7.4 Register Description and Programming.
7-8
Figure 7-3. Baud Rate Generator Block Diagram
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68340 USER’S MANUAL
GENERATOR LOGIC
Go to: www.freescale.com
OSCILLATOR
GENERATOR
SELECTORS
BAUD RATE
BAUD RATE
CRYSTAL
CLOCK
EXTERNAL
INTERFACE
. . . . . . . . . . . . . . . .
X1
X2
SCLK
MOTOROLA