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Freescale Semiconductor
31-1
Chapter 31
UART Modules
31.1
Introduction
This chapter describes the use of the three universal asynchronous receiver/transmitters (UARTs) and
includes programming examples.
NOTE
The designation
n
appears throughout this section to refer to registers or
signals associated with one of the three identical UART modules: UART0,
UART1, or UART2.
31.1.1
Overview
The internal bus clock can clock each of the three independent UARTs, eliminating the need for an external
UART clock. As
shows, each UART module interfaces directly to the CPU and consists of:
•
Serial communication channel
•
Programmable clock generation
•
Interrupt control logic and DMA request logic
•
Internal channel control logic
Figure 31-1. UART Block Diagram
Serial
Interrupt Control
Logic
Internal Channel
Control Logic
Programmable
Clock
Communications
Channel
Generation
UART
Internal Bus Clock (f
sys/3
)
or External Clock (DTnIN)
DMA Request
Logic
Transmit DMA Request
Receive DMA Request
Interrupt Request
(to Interrupt Controller)
(To DMA Controller)
External
Si
gnal
s
UART Registers
UnCTS
UnRTS
UnRXD
UnTXD
Internal Bus
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...