ISP1581
Hi-Speed USB peripheral controller
Philips Semiconductors
6.2 Pin description
Table 2:
Symbol[1]
DGND
Pin description for LQFP64
Pin
1
Type[2] Description
-
-
digital ground
[3]
VCC(5.0)
2
supply voltage (3.3 or 5.0 V)
for 5.0 V operation, this is the only pin used. Refer to
Section 10
AGND
3
4
-
-
analog ground
[3]
VCCA(3.3)
regulated supply voltage (3.3 V ± 0.3 V) from internal
regulator; supplies internal analog circuits; used to connect
decoupling capacitor and 1.5 kΩ pull-up resistor on D+ line
Remark: Cannot be used to supply external devices. Refer
to Section 10
D−
5
6
7
A
A
A
USB D− connection (analog)
USB D+ connection (analog)
D+
RPU
connection for external pull-up resistor for USB D+ line;
must be connected to VCCA(3.3) via a 1.5 kΩ resistor
RREF
8
9
A
I
connection for external bias resistor; must be connected to
ground via a 12.0 kΩ (± 1%) resistor
MODE1
selects function of pin ALE/A0 (in Split Bus mode only):
0 — ALE function (address latch enable)
1 — A0 function (address/data indicator).
Remark: Connect to VCC(5.0) in the Generic Processor
mode.
input pad; TTL; 5 V tolerant; internal pull-down resistor.
RESET
EOT
10
11
I
I
reset input; a LOW level produces an asynchronous reset;
connect to VCC for power-on reset (internal POR circuit)
TTL with hysteresis; 5 V tolerant; internal pull-up resistor.
End Of Transfer input (programmable polarity, see
Table 37); used in DMA slave mode only; when not in use,
connect this pin to VCC(I/O) through a 10 kΩ resistor
input pad; TTL; 5 V tolerant; 5 ns slew rate control.
DREQ
DACK
12
13
I/O
I/O
DMA request (programmable polarity); direction depends
on the bit MASTER in the DMA Hardware register (DMA
master: input, DMA slave: output); see Table 35 and
Table 36; when not in use, connect this pin to ground
through a 10 kΩ resistor;
bidirectional pad; push pull output; 5 ns slew rate control;
TTL; 5 V tolerant.
DMA acknowledge (programmable polarity); direction
depends on bit MASTER in the DMA Hardware register
(DMA slave: input, DMA master: output); see Table 35 and
Table 36; when not in use, connect this pin to VCC(I/O)
through a 10 kΩ resistor
bidirectional pad; push pull output; 5 ns slew rate control;
TTL; 5 V tolerant.
9397 750 13462
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 06 — 23 December 2004
5 of 79
NXP [ NXP ]
