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8 legacy functional blocks, 1 parallel port, 1 parallel port register and bit maps – AMD Geode SC1201 User Manual

Page 129: Legacy functional blocks, Table 5-33, Parallel port register map for first level offset, Table 5-34, Parallel port register map for second level offset

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AMD Geode™ SC1200/SC1201 Processor Data Book

129

SuperI/O Module

32579B

5.8

Legacy Functional Blocks

This section briefly describes the following blocks that pro-
vide legacy device functions:

Parallel Port. (Similar to Parallel Port in the National

Semiconductor PC87338.)

Serial Port 1 and Serial Port 2 (SP1 and SP2), UART

functionality for both SP1 and SP2. (Similar to SCC1 in
the National Semiconductor PC87338.)

Infrared Communications Port / Serial Port 3 function-

ality. (Similar to SCC2 in the National Semiconductor
PC87338.)

The description of each Legacy block includes a general
description, register maps, and bit maps.

5.8.1

Parallel Port

The Parallel Port supports all IEEE1284 standard commu-
nication modes: Compatibility (known also as Standard or
SPP), Bidirectional (known also as PS/2), FIFO, EPP
(known also as Mode 4) and ECP (with an optional
Extended ECP mode).

5.8.1.1

Parallel Port Register and Bit Maps

The Parallel Port register maps (Table 5-33 and Table 5-34)
are grouped according to first and second level offsets.
EPP and second level offset registers are available only
when the base address is 8-byte aligned.

Parallel Port functional block bit maps are shown in Table 5-
35
and Table 5-36.

Table 5-33. Parallel Port Register Map for First Level Offset

First Level Offset

Type

Name

Modes (ECR Bits) 7 6 5

000h R/W

DATAR. PP Data

000 or 001

000h W

AFIFO. ECP Address FIFO

011

001h RO

DSR. Status

All Modes

002h R/W

DCR. Control

All Modes

003h

R/W

ADDR. EPP Address

100

004h

R/W

DATA0. EPP Data Port 0

100

005h

R/W

DATA1. EPP Data Port 1

100

006h

R/W

DATA2. EPP Data Port 2

100

007h

R/W

DATA3. EPP Data Port 3

100

400h W

CFIFO. PP Data FIFO

010

400h R/W

DFIFO. ECP Data FIFO

011

400h R/W

TFIFO. Test FIFO

110

400h RO

CNFGA. Configuration A

111

401h RO

CNFGB. Configuration B

111

402h R/W

ECR. Extended Control

All Modes

403h

R/W

EIR. Extended Index

All Modes

404h

R/W

EDR. Extended Data

All Modes

405h

R/W

EAR. Extended Auxiliary Status

All Modes

Table 5-34. Parallel Port Register Map for Second Level Offset

Second Level Offset

Type

Name

00h

R/W

Control0. Control Register 0

02h

R/W

Control2. Control Register 2

04h

R/W

Control4. Control Register 4

05h

R/W

PP Confg0. Parallel Port Configuration Register 0

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