HFA3842B Datasheet, PDF (3/26 Pages) Intersil Corporation – PCMCIA/USB Wireless LAN Medium Access Controller

HFA3842B
HFA3842B 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-
USB+
USB-
USB ATTACHED
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
12
CMOS BiDir, 2mA, (Also USB Transceiver)
11
CMOS BiDir, 2mA, (Also USB Transceiver)
105
Input, 5V Tolerant, Pull-Down
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
USB, MBUS Address Bit 20, or I/O as PL5
USB, MBUS Address Bit 21, or I/O or I/O as PL6
Sense USB VBUS to Indicate Cable Attachment
TABLE 1. MEMORY INTERFACE PINS
PIN NAME
PIN NUMBER
PIN I/O TYPE
DESCRIPTION
MUBE- / MA0 /
MWEH-
72
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
MA1-18
73-81, 84-92 CMOS TS Output, 2mA
MBUS Address Bits 1 to 18
PL4
43
CMOS BiDir, 2mA
MBUS Address Bit 19
PL5
12
CMOS BiDir, 2mA, 50K Pull Up
MBUS Address Bit 20 (See Note 1)
PL6
11
CMOS BiDir, 2mA
MBUS Address Bit 21 (See Note 1)
MLBE-
62
CMOS TS Output, 2mA, 50K Pull Up
MBUS Lower Byte Enable, or I/O as PM2
MOE-
70
CMOS TS Output, 2mA
Memory Output Enable
MWE- / MWEL-
71
CMOS TS Output, 2mA
Low (or only) Byte Memory Write Enable
RAMCS-
69
CMOS TS Output, 2mA
RAM Select
NVCS-
68
CMOS TS Output, 2mA
NV Memory Select
MD0-7
61-54
5V Tol, CMOS, BiDir, 2mA, 100K Pull Up
MBUS Low Data Byte, Bits 0 to 7
MD8-15
51-44
5V Tol, CMOS, BiDir, 2mA 50K Pull Down
MBUS High Data Byte, Bits 8 to 15
NOTE:
1. Not available if USB interface is used.
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