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8019AS.doc
2001-05-10
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SPECIFICATION
RTL8019AS
9
62,63
LED1,LED2
O
When LEDS1 bit (in CONFIG3 register of RTL8019AS
Page3) is 0, these 2 pins act as LED_RX & LED_TX
respectively. When LEDS1=1, these pins act as LED_CRS
& MCSB. Please refer to section 6.5 for details of the
lightening behavior of all LEDs.
5. Register Descriptions
The registers in RTL8019AS can be roughly divided into two groups by their address and functions
-- one for NE2000, the other for Plug and Play (PnP).
5.1. Group 1: NE2000 Registers
This group includes 4 pages of registers which are selected by bit PS0 & PS1 in the CR register.
Each page contains 16 registers. Besides those registers compatible with NE2000, the RTL8019AS
defines some registers for software configuration and feature enhancement.
5.1.1. Register Table
No (Hex)
Page0
Page1
Page2
Page3
[R]
[W]
[R/W]
[R]
[R]
[W]
00
CR
CR
CR
CR
CR
CR
01
CLDA0
PSTART
PAR0
PSTART
9346CR
9346CR
02
CLDA1
PSTOP
PAR1
PSTOP
BPAGE
BPAGE
03
BNRY
BNRY
PAR2
-
CONFIG0
-
04
TSR
TPSR
PAR3
TPSR
CONFIG1
CONFIG1
05
NCR
TBCR0
PAR4
-
CONFIG2
CONFIG2
06
FIFO
TBCR1
PAR5
-
CONFIG3
CONFIG3
07
ISR
ISR
CURR
-
-
TEST
08
CRDA0
RSAR0
MAR0
-
CSNSAV
-
09
CRDA1
RSAR1
MAR1
-
-
HLTCLK
0A
8019ID0
RBCR0
MAR2
-
-
-
0B
8019ID1
RBCR1
MAR3
-
INTR
-
0C
RSR
RCR
MAR4
RCR
-
FMWP
0D
CNTR0
TCR
MAR5
TCR
CONFIG4
-
0E
CNTR1
DCR
MAR6
DCR
-
-
0F
CNTR2
IMR
MAR7
IMR
-
-
10-17
Remote DMA Port
18-1F
Reset Port
Notes: "-" denotes reserved. Registers with names typed in bold italic format are RTL8019AS
defined registers and are not supported in a standard NE2000 adapter.
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