PDIUSBD12 Datasheet, PDF (3/35 Pages) NXP Semiconductors – USB interface device with parallel bus

Philips Semiconductors
PDIUSBD12
USB interface device with parallel bus
3.2 Pin description
Table 1: Pin description
Symbol Pin Type^[1] Description
DATA <0> 1 IO2
Bit 0 of bidirectional data. Slew-rate controlled.
DATA <1> 2 IO2
Bit 1 of bidirectional data. Slew-rate controlled.
DATA <2> 3 IO2
Bit 2 of bidirectional data. Slew-rate controlled.
DATA <3> 4 IO2
Bit 3 of bidirectional data. Slew-rate controlled.
GND
5P
Ground.
DATA <4> 6 IO2
Bit 4 of bidirectional data. Slew-rate controlled.
DATA <5> 7 IO2
Bit 5 of bidirectional data. Slew-rate controlled.
DATA <6> 8 IO2
Bit 6 of bidirectional data. Slew-rate controlled.
DATA <7> 9 IO2
Bit 7 of bidirectional data. Slew-rate controlled.
ALE
10 I
Address Latch Enable. The falling edge is used to close the
latch of the address information in a multiplexed address/ data
bus. Permanently tied LOW for separate address/ data bus
configuration.
CS_N
11 I
Chip Select (Active LOW).
SUSPEND 12 I,OD4 Device is in Suspend state.
CLKOUT 13 O2
Programmable Output Clock (slew-rate controlled).
INT_N
14 OD4 Interrupt (Active LOW).
RD_N
15 I
Read Strobe (Active LOW).
WR_N
16 I
Write Strobe (Active LOW).
DMREQ 17 O4
DMA Request.
DMACK_N 18 I
DMA Acknowledge (Active LOW).
EOT_N 19 I
End of DMA Transfer (Active LOW). Double up as V_BUS sensing.
EOT_N is only valid when asserted together with DMACK_N
and either RD_N or WR_N.
RESET_N 20 I
GL_N
21 OD8
Reset (Active LOW and asynchronous). Built-in Power-on reset
circuit present on chip, so pin can be tied HIGH to V_CC.
GoodLink LED indicator (Active LOW)
XTAL1
22 I
Crystal Connection 1 (6 MHz).
XTAL2
23 O
Crystal Connection 2 (6 MHz). If external clock signal, instead
of crystal, is connected to XTAL1, then XTAL2 should be
floated.
V_CC
24 P
Voltage supply (4.0 − 5.5 V).
To operate the IC at 3.3 V, supply 3.3 V to both V_CC and V_OUT3.3
pins.
D−
25 A
USB D− data line.
D+
26 A
USB D+ data line.
9397 750 09238
Product data
Rev. 08 — 20 December 2001
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
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