MPU subsystem
MPU SS INTC
M_IRQ_72
M_IRQ_73
M_IRQ_74
sDMA
S_DMA_48/49
S_DMA_50/51
S_DMA_52/53
IVA2.2 subsystem
IVA2.2 SS INTC
IVA2_IRQ[15]
IVA2.2 SS EDMA
D_DMA_10/11
PRCM
UART2
(UART)
UART1
(UART)
UART3
(UART/IrDA)
UART1_IRQ
UART1_DMA_TX/RX
UART2_IRQ
UART2_DMA_TX/RX
UART3_IRQ
UART3_DMA_TX/RX
2
2
2
Device
GPIO
Interrupt
generation
uart1_cts
(wake-up)
uart2_cts
(wake-up)
uart3_cts
(wake-up)
(1)
(3)
(2)
Registers
Registers
IDLE hardware
handshake
UART3.SYSC[4:3]
UART3_SWAKEUP
UART3_SWAKEUP
UART3_ICLK
UART3_FCLK
IDLE hardware
handshake
UART2.SYSC[4:3]
UART2_SWAKEUP
UART2_SWAKEUP
UART2_ICLK
UART2_FCLK
IDLE hardware
handshake
UART1.SYSC[4:3]
UART1_SWAKEUP
UART1_SWAKEUP
UART1_ICLK
UART1_FCLK
32
32
L4-Core
uart-021
(1)
(2)
UART4_ICLK
UART4_FCLK
IDLE hardware
handshake
(3)
32
L4-Per
Registers
UART4
(UART)
UART4_IRQ
UART4_DMA_TX/RX
2
Registers
UART4.SYSC[4:3]
32
M_IRQ_80
S_DMA_80/81
UART4_SWAKEUP
Public Version
UART/IrDA/CIR Integration
www.ti.com
19.3 UART/IrDA/CIR Integration
shows the device internal connections with related modules for UART functions.
Figure 19-20. UART Functional Integration
19.3.1 Clocking, Reset, and Power-Management Scheme
19.3.1.1 Clocking
Each UART uses a 48-MHz functional clock for its logic and the generation of external interface signals.
Each UART uses an interface clock for register accesses. The power, reset, and clock management
(PRCM) module generates and controls all these clocks (for more information, see
, Power,
Reset, and Clock Management).
describes the UART clocks.
2886
UART/IrDA/CIR
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated