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HFA3842 PDF даташит

Спецификация HFA3842 изготовлена ​​​​«Intersil Corporation» и имеет функцию, называемую «Wireless LAN Medium Access Controller».

Детали детали

Номер произв HFA3842
Описание Wireless LAN Medium Access Controller
Производители Intersil Corporation
логотип Intersil Corporation логотип 

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HFA3842 Даташит, Описание, Даташиты
TM
Data Sheet
HFA3842
June 2001
File Number 4839.2
Wireless LAN Medium Access Controller
The Intersil HFA3842 Wireless LAN
Medium Access Controller is part of
the PRISM® 2.4GHz radio chip set.
The HFA3842 directly interfaces with
the Intersil HFA386x family of Baseband Processors,
offering a complete end-to-end chip set solution for wireless
LAN products. Protocol and PHY support are implemented
in firmware to allow custom protocol and different PHY
transceivers.
The HFA3842 is designed to provide maximum performance
with minimum power consumption. Package pin layout
provides optimal PC board layout to all user interfaces.
Firmware implements the full IEEE 802.11 Wireless LAN
MAC protocol. It supports BSS and IBSS operation under
DCF, and operation under the optional Point Coordination
Function (PCF). Low level protocol functions such as
RTS/CTS generation and acknowledgement, fragmentation
and de-fragmentation, and automatic beacon monitoring are
handed without host intervention. Active scanning is
performed autonomously once initiated by host command.
Host interface command and status handshakes allow
concurrent operations from multi-threaded I/O drivers.
Additional firmware functions specific to access point
applications are also available.
Designing wireless protocol systems using the HFA3842 is
made easier with the availability of evaluation board,
firmware, software device drivers, and complete
documentation.
The HFA3842 is a WLAN MAC Controller IC, based on the
HFA3841. Pin-for-pin upgrade replacement for the HFA3841.
Features
• New start up modes allow the PCMCIA Card Information
Structure to be initialized from a serial EEPROM. This
allows firmware to be downloaded from the host,
eliminating the parallel Flash memory device.
• Firmware can be loaded from serial Flash memory.
• Direct attachment to a typical x16 SRAM using five control
signals (RAMCS_, MOE_, MWEL_, MLBE_, and MUBE_).
• Low frequency crystal oscillator to maintain time and allow
baseband clock source to power off during sleep mode.
• Improved performance of internal WEP engine.
• On-chip execution can now be viewed while in debug mode.
• Independent programmable cycle timing for external chip
selects allows attachment of slow memory devices without
compromising higher speed instruction execution.
• Pinout is backward compatible with HFA3841.
• IEEE802.11 Standard Data Rates: 1, 2, 5.5 and 11Mbps
• Part of the Intersil PRISM Wireless LAN Chip Set
• Full Implementation of the MAC Protocol Specified in
IEEE Standards 802.11-1999 and 802.11b
• PCMCIA Host Interface Supports Full 16-Bit
Implementation of PC Card 16 (1995), also ISA PNP with
Additional Chip
• Host Interface Provides Dual Buffer Access Paths
• External Memory Interface Supports up to 4M bytes RAM
• Internal Encryption Engine Executes IEEE802.11 WEP
• Low Power Operation; 25mA Active, 8mA Doze, <1mA
Sleep
• Operation at 2.7V to 3.6V Supply
• 5V Tolerant Host Interface Input/Outputs
• 128 Pin LQFP Package Targeted for Type II PC Cards
• IEEE802.11 Wireless LAN MAC Protocol Firmware and
Microsoft® Windows® Software Drivers
• Pin for Pin Replacement for the HFA3841 Supporting all
Functions and operations of the HFA3841
Applications
• High Data Rate Wireless LAN
• PC Card Wireless LAN Adapters
• PCI Wireless LAN Cards (Using Ext. Bridge Chip)
• Wireless LAN Modules
• Wireless LAN Access Points
• Wireless Bridge Products
• Wireless Point-to-Multipoint Systems
• ISA, ISA PNP WLAN Cards
Ordering Information
PART
NUMBER
HFA3842IN
HFA3842IN96
TEMP. RANGE
(oC)
PACKAGE
PKG. NO.
-40 to 85 128 Ld LQFP Q128.14x20
-40 to 85 Tape and Reel
Microsoft® and Windows® are registered trademarks of Microsoft Corporation.
PRISM® is a registered trademark of Intersil Americas Inc.
PRISM and design is a trademark of Intersil Americas Inc.
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2001, All Rights Reserved









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HFA3842 Даташит, Описание, Даташиты
Pinout
HFA3842
128 LEAD LQFP
HINPACK-
HWAIT-
NC
HA0
HA1
HA2
HA3
HA4
HA5
HA6
HA7
HIREQ-
VSS_IO3
HWE-
HA8
HA9
HIOWR-
HIORD-
HOE-
HCE2-
HD15
VCC _IO3
HD14
HD13
HD12
HD11
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
INDEX
64 PK4
63 PK3
62 MLBE-
61 MD0
60 MD1
59 MD2
58 MD3
57 MD4
56 MD5
55 MD6
54 MD7
53 VCC_CORE3
52 VSS_IO3
51 MD8
50 MD9
49 MD10
48 MD11
47 MD12
46 MD13
45 MD14
44 MD15
43 PL4
42 VSS_IO3
41 LFXTALO
40 CLKIN
39 LFXTALI
Simplified Block Diagram
PRISM RADIO
BASEBAND
PROCESSOR
TXD/RXD
CTRL/STATUS
SERIAL CONTROL
PRISM RADIO
RF SECTION
RADIO AND SYNTH
SERIAL CONTROL
HFA3842
PHY
INTERFACE
(MDI)
MICRO-
PROGRAMMED
MAC ENGINE
WEP
ENGINE
PC CARD
HOST
INTERFACE
SERIAL
CONTROL
(MMI)
ON-CHIP
ROM
MEMORY
CONTROLLER
ON-CHIP
RAM
44MHz CLOCK
SOURCE
EXTERNAL
SRAM AND
FLASH
MEMORY
HOST
COMPUTER
DATA
ADDRESS
CONTROL
2









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HFA3842 Даташит, Описание, Даташиты
HFA3842
HFA3842 Pin Descriptions
HOST INTERFACE PINS
PIN NAME
PIN NUMBER
PIN I/O TYPE
HA0-9
106-113, 117, 118 5V Tol, CMOS, Input, 50K Pull Down
HCE1-
1 5V Tol, CMOS, Input, 50K Pull Up
HCE2-
122 5V Tol, CMOS, Input, 50K Pull Up
HD0-15
101-99, 6-2,
96-94, 128-125,
123
5V Tol, BiDir, 2mA, 50K Pull Down
HINPACK-
103 CMOS Output, 2mA
HIORD-
120 5V Tol, CMOS, Input, 50K Pull Up
HIOWR-
119 5V Tol, CMOS, Input, 50K Pull Up
HRDY/HIREQ-
114 CMOS Output, 4mA
HOE-
HREG-
HRESET
HSTSCHG-
HWAIT-
HWE-
121 5V Tol, CMOS, Input, 50K Pull Up
102 5V Tol, CMOS, Input, 50K Pull Up
16 5V Tol, CMOS, ST Input, 50K Pull Up
36 CMOS Output, 4mA
104 CMOS Output, 4mA
116 5V Tol, CMOS Input, 50K Pull Up
DESCRIPTION
PC Card Address Input, Bits 0 to 9
PC Card Select, Low Byte
PC Card Select, High Byte
PC Card Data Bus, Bit 0 to 15
PC Card I/O Decode Confirmation
PC Card I/O Space Read
PC Card I/O Space Write
PC Card interrupt Request (I/O Mode) Card Ready
(Memory Mode)
PC Card Memory Attribute Space Output Enable
PC Card Attribute Space Select
Hardware Reset
PC Card Status Change
PC Card Not Ready (Force Host Wait State)
PC Card Memory Attribute Space Write Enable
PIN NAME
MUBE- / MA0 /
MWEH-
MA1-18
PL4
PL5
PL6
MLBE-
MOE-
MWE- / MWEL-
RAMCS-
NVCS-
MD0-7
MD8-15
1.
2.
PIN NUMBER
72
73-81, 84-92
43
12
11
62
70
71
69
68
61-54
51-44
TABLE 1. MEMORY INTERFACE PINS
PIN I/O TYPE
DESCRIPTION
CMOS TS Output, 2mA
MBUS Upper Byte Enable for x16 Memory; MBUS
Address Bit 0 (byte) for x8 Memory; High Byte Write
Enable for 2 x8 Memories
CMOS TS Output, 2mA
MBUS Address Bits 1 to 18
CMOS BiDir, 2mA
MBUS Address Bit 19
CMOS BiDir, 2mA, 50K Pull Up
MBUS Address Bit 20
CMOS BiDir, 2mA
MBUS Address Bit 21
CMOS TS Output, 2mA, 50K Pull Up
MBUS Lower Byte Enable, or I/O as PM2
CMOS TS Output, 2mA
Memory Output Enable
CMOS TS Output, 2mA
Low (or only) Byte Memory Write Enable
CMOS TS Output, 2mA
RAM Select
CMOS TS Output, 2mA
NV Memory Select
5V Tol, CMOS, BiDir, 2mA, 100K Pull Up
MBUS Low Data Byte, Bits 0 to 7
5V Tol, CMOS, BiDir, 2mA 50K Pull Down
MBUS High Data Byte, Bits 8 to 15
PIN NAME
PIN NUMBER
GENERAL PURPOSE PORT PINS
TXD
17
TXC
18
RXD
19
RXC
20
TABLE 2. GENERAL PURPOSE AND EEPROM PORT PINS
PIN I/O TYPE
DESCRIPTION OF FUNCTION
(IF OTHER THAN IO PORT)
CMOS BiDir, 2mA, 50K Pull Down
CMOS BiDir, 2mA
CMOS Input
CMOS Input
Transmit Data Out
Transmit Clock In/Out
Receive Data In
Receive Clock In
3










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