mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 508

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Timing Differences
The UART module interfaces directly to the CPU as shown in Figure A-2. The UART
module consists of the following major functional areas:
In addition, UART1 has been enhanced to provide a CODEC interface for soft modem
support. UART1 can be programmed to provide any one of the following functions:
A.6 Timing Differences
This section explains timing relationships within phase-locked loop registers.
A.6.1 Phase-Locked Loop (PLL)
The PLL for the MCF5407 is enhanced to support faster processor clock (PCLK)
frequencies. The MCF5307 supports PCLK frequencies of 66.7 and 90 MHz with a clock
input (CLKIN) of 1/2 PCLK. The MCF5407 offers a larger range of clock input ratios and
a higher performance processor clock. For more details see Section 7.1.1, “PLL:PCLK
Ratios” and Chapter 20, “Electrical Specifications”.
The MCF5407 PLL module is shown in Figure A-3.
A-6
• Serial communication channel
• 16-bit timer for baud-rate generation
• Internal channel control logic
• Interrupt control logic
• The original UART (identical to UART0)
• Three modem modes, (see Section 14.5.2.2, “Transmitter in Modem Mode
(UART1) for more details)”:
— An 8-bit CODEC interface
— A 16-bit CODEC interface
— An audio CODEC 97 (AC97) digital interface controller
System Integration
Module (SIM)
Controller
Interrupt
Figure A-2. Simplified Block Diagram
Internal Channel
Interrupt Control
Control Logic
Logic
MCF5407 User’s Manual
UART
Communications
16-Bit Timer for
Generation
Baud-Rate
Channel
Serial
CTS
RTS
RxD
TxD
CLKIN
or
External clock (TIN)