DP83901AV National Semiconductor, DP83901AV Datasheet - Page 20

• Manufacturer Part Number: DP83901AV
• Description: IC CONTROLLR SER NETWK IN 68PLCC
• Manufacturer: National Semiconductor

Specifications of DP83901AV

• Controller Type: Serial Network Interface Controller
• Interface: Serial
• Voltage - Supply: 5V
• Current - Supply: 110mA
• Mounting Type: Surface Mount
• Package / Case: 68-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Operating Temperature: -
• Other names: *DP83901AV

10 0 Internal Registers
All registers are 8-bit wide and mapped into four pages
which are selected in the Command Register (PS0 PS1)
Pins RA0–RA3 are used to address registers within each
page Page 0 registers are those registers which are com-
10 1 REGISTER ADDRESS MAPPING
10 2 REGISTER ADDRESS ASSIGNMENTS
Page 0 Address Assignments (PS1
RA0 –RA3
00H
01H
02H
03H
04H
05H
06H
07H
08H
Command (CR)
Current Local DMA
Address 0 (CLDA0)
Current Local DMA
Address 1 (CLDA1)
Boundary Pointer
(BNRY)
Transmit Status
Register (TSR)
Number of Collisions
Register (NCR)
FIFO (FIFO)
Interrupt Status
Register (ISR)
Current Remote DMA Remote Start Address
Address 0 (CRDA0)
RD
Command (CR)
Page Start Register
(PSTART)
Page Stop Register
(PSTOP)
Boundary Pointer
(BNRY)
Transmit Page Start
Address (TPSR)
Transmit Byte Count
Register 0 (TBCR0)
Transmit Byte Count
Register 1 (TBCR1)
Interrupt Status
Register (ISR)
Register 0 (RSAR0)
e
0 PS0
WR
e
0)
20
monly accessed during SNIC operation while page 1 regis-
ters are used primarily for initialization The registers are
partitioned to avoid having to perform two write read cycles
to access commonly used registers
RA0– RA3
09H
0AH
0BH
0CH
0DH
0EH
0FH
Current Remote DMA Remote Start Address
Address 1 (CRDA1)
Reserved
Reserved
Receive Status
Register (RSR)
Tally Counter 0
(Frame Alignment
Errors) (CNTR0)
Tally Counter 1
(CRC Errors)
(CNTR1)
Tally Counter 2
Missed Packet
Errors) (CNTR2)
RD
TL F 10469 – 16
Register 1 (RSAR1)
Remote Byte Count
Register 0 (RBCR0)
Remote Byte Count
Register 1 (RBCR1)
Receive Configuration
Register (RCR)
Transmit Configuration
Register (TCR)
Data Configuration
Register (DCR)
Interrupt Mask
Register (IMR)
WR