AM8530H AMD [Advanced Micro Devices], AM8530H Datasheet - Page 13

• Manufacturer Part Number: AM8530H
• Description: Serial Communications Controller
• Manufacturer: AMD [Advanced Micro Devices]

General Information
1.3
Figure 1–1 depicts the block diagram of the Am8530H and Figure 1–2 the block diagram
of the Am85C30. Data being received enters the receive data pins and follows one of
several data paths, depending on the state of the control logic. The contents of the regis-
ters and the state of the external control pins establish the internal control logic. Transmit-
ted data follows a similar pattern of control, register, and external pin definition.
Control
Cont
Data
Data
8
5
5
8
+5 V GND PCLK
BLOCK DIAGRAM
Bus I/O
Interrupt
CPU
Control
Lines
Lines
Bus
Cont
CP
I/O
Int
Figure 1–1. Am8530H Block Diagram
Figure 1–2. Am85C30 Block Diagram
Interrupt
Internal
Control
Control
Logic
Logic
Logic
Logic
Cont
Cont
Int
Int
Internal Bus
Internal Bus
Channel B
Channel A
Registers
Registers
Ch B
Baud
Baud
Rate
Rate
Ch A
Reg
Gen
Gen
Reg
A
B
Channel A
10 x 19-Bit
Generator
Frame
Status
Baud
FIFO
Rate
Control and
Control and
Channel
Channel B
Status B
Discrete
Discrete
Status A
Channel
A
B
Transmitter/
Receiver
Control
Logic
Channel Clocks
Wait/Request
Serial
Data
SYNC
Wait / Request
Modem, DMA,
or
Other Controls
Serial
Data
Channel Clocks
SYNC
Modem, DMA,
or
Other Controls
07513C-001A
10216A-001A
AMD
TxDA
TRxCA
RxDA
RTxCA
SYNCA
CTSA
RTSA
DCDA
TxDB
RxDB
RTxCB
TRxCB
SYNCB
RTSB
CTSB
DCDB
1–5