sc3200 Advanced Micro Devices, sc3200 Datasheet - Page 151
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sc3200
Manufacturer Part Number
sc3200
Description
Geode-tm Sc3200 Processor
Manufacturer
Advanced Micro Devices
Datasheet
1.SC3200.pdf
(447 pages)
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SuperI/O Module
5.8.3
This section describes the IRCP/SP3 support registers.
The IRCP/SP3 functional block provides advanced, versa-
tile serial communications features with IR capabilities.
The IRCP/SP3 also supports two DMA channels; the func-
tional block can use either one or both of them. One chan-
nel is required for IR-based applications, since IR
communication works in half duplex fashion. Two channels
would normally be needed to handle high-speed full duplex
IR based applications.
The IRCP or Serial Port 3 is chosen via bit 6 of the PMR
Register (see Section 4.2 "Multiplexing, Interrupt Selection,
and Base Address Registers" on page 88).
5.8.3.1
Eight register banks, each containing eight registers, con-
trol IR/SP3 operation. All registers use the same 8-byte
address space to indicate offsets 00h through 07h. The
BSR register selects the active bank and is common to all
banks. See Figure 5-19.
5.8.3.2
The tables in this subsection provide register and bit maps
for Banks 0 through 7.
1.
AMD Geode™ SC3200 Processor Data Book
When bit 7 of this register is set to 1, bits [6:0] of BSR select the bank, as shown in Table 5-47.
Offset
00h
01h
02h
03h
04h
05h
06h
07h
IR Communications Port (IRCP) / Serial
Port 3 (SP3) Functionality
IR/SP3 Mode Register Bank Overview
IRCP/SP3 Register and Bit Maps
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RO
RO
W
W
Name
RXD. Receive Data Port
TXD. Transmit Data Port
IER. Interrupt Enable
EIR. Event Identification
FCR. FIFO Control
LCR
BSR
MCR. Modem/Mode Control
LSR. Link Status
MSR. Modem Status
SPR. Scratchpad
ASCR. Auxiliary Status and Control
Table 5-46. Bank 0 Register Map
1
1
. Link Control
. Bank Select
Figure 5-19. IRCP/SP3 Register Bank
Offset 07h
Offset 06h
Offset 05h
Offset 04h
Offset 02h
Offset 01h
Offset 00h
LCR/BSR
Bank 0
Bank 1
Bank 2
Architecture
Bank 3
Revision 5.1
Bank 4
Bank 5
Bank 6
Common
Register
Throughout
All Banks
Bank 7
151
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