DMA Controller
Am186™CC/CH/CU Microcontrollers User’s Manual
8-3
8.2
BLOCK DIAGRAM
Figure 8-1 shows the block diagram for the general-purpose DMA and SmartDMA
controllers.
Figure 8-1
DMA Block Diagram
DMA3–0 CONTROL (2)
DMA3–0 TRANSFER COUNT
DMA3–0 DEST ADDR (2)
DMA3–0 SOURCE ADDR (2)
SDMA3–0 CONTROL
TX_DMA3–0
TX_DMA3–0
20-Bit
GP DMA
SDMA
SDMA Control
Arbiter
DMA
Generator
Cycle
DRQ
Select
DRQ1–DRQ0
Control Bus
TC
B
u
s
DST
/S
RC ADDR
Bu
s
Se
le
ct DRQ1
1
–
DRQ0
RX_DMA3–0
RX_DMA3–0
Bus Request
Bus Grant
PCB Interface
Address
Decode
DRQ11–DRQ0
SDMA3–0 STATUS
TX_DMA3–0
DMAREG
PCB
Block
USB
HDLC
Timer
BIU
INT CNTL
BIU
ADD/SUB
State Machine
State Machine
Buffer Descriptor COUNT
Buffer Descriptor POINTER
CURRENT Buffer Descriptor
Buffer Descriptor COUNT
Buffer Descriptor POINTER
CC
CU
CC
CH
DHLT
UART/
High-Speed
UART
Summary of Contents for Am186 CC
Page 1: ...Am186 CC CH CU Microcontrollers User s Manual Order 21914B...
Page 4: ...iv Am186 CC CH CU Microcontrollers User s Manual...
Page 18: ...Table of Contents xviii Am186 CC CH CU Microcontrollers User s Manual...
Page 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Page 40: ...Architectural Overview 1 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Page 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Page 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Page 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Page 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Page 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Page 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Page 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Page 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...