Philips Integrated Circuits PDIUSBH12 Datasheet page 6

Philips Semiconductors
USB 2-port hub
PINNING
The PDIUSBH12 has two modes of operation. The first mode (Mode 0) configures the pins DNx_GL_N for GoodLink
second mode (Mode 1) configures the LED pins as per port overcurrent condition pins. An overcurrent condition on any port can be uniquely
identified in Mode 1. However, all downstream ports are disabled as a result of a single overcurrent condition. In addition to the two modes of
operation, the PDIUSBH12 can also be configured to take either a 48 MHz crystal oscillator (for backward compatibility to PDIUSBH11) or a 12
MHz crystal.
The internal 4X clock multiplier PLL will be activated when 12 MHz input XTAL mode is selected. Also, the output clock frequency is now
programmable rather than fixed to 12 MHz. The output clock frequency can be programmed through the Set Mode command. All these new
features are added while maintaining backward compatibility to the PDIUSBH11 through TEST2 and TEST1 pins.
TEST2 TEST1
00
01
10
11
NOTE:
1. Pin TEST3 should always be connected to Ground at all times.
Pin configuration
TEST1 1
TEST2 2
TEST3 3
RESET_N 4
GND 5
XTAL1 6
XTAL2 7
CLKOUT 8
V 9
CC
OCURRENT_N /
10
OCURRENT2_N
SWITCH_N 11
SUSPEND 12
DN2_GL_N 13
DN3_GL_N /
14
OCURRENT3_N
NOTE:
Pin 10 and Pin 14 show alternative pin functions, depending on
mode of operation (Mode 0 or Mode 1) as described in
Pin Description .
1999 Jul 22
MODE
MODE 0
(GoodLink )
MODE 0
(GoodLink )
MODE 1
(Individual Overcurrent)
MODE 1
(Individual Overcurrent)
28 UP_DM
27 UP_DP
26 AV
CC
25 AGND
24 DN2_DM
23 DN2_DP
22 DN3_DM
21 DN3_DP
20 GND
19 SCL
18 SDA
17 INT_N
16 RSVD
15 RSVD
SV01751
6
INPUT XTAL FREQUENCY
(MHz)
48
12
12
48
Product specification
PDIUSBH12
LED indication. The
OUTPUT CLOCK FREQUENCY
(AT REST)
12MHz
4 MHz
4 MHz
12 MHz