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Philips Semiconductors ISP1520
Hi-Speed USB hub controller
9397 750 13701 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data Rev. 03 — 24 November 2004 4 of 51
6. Block diagram

Fig 1. Block diagram.

004aaa169
I2C-BUS
CONTROLLER
POWER
SWITCH
OVERCURRENT
DETECTION
LINK LEDS LINK LEDS
BIT CLOCK
RECOVERY
PLL
ANALOG
TRANSCEIVER
• ORIGINAL USB
• HI-SPEED USB
ROUTING LOGIC
PHILIPS PIE
PHILIPS SIE
PORT
CONTROLLER
HUB
CONTROLLER
RAM
ROM
MINI-HOST
CONTROLLER
HUB REPEATER
• ORIGINAL USB
• HI-SPEED USB
ANALOG TRANSCEIVER
• ORIGINAL USB
• HI-SPEED USB
TRANSACTION
TRANSLATOR
VCC1
RPU DM0 DP0
SDA
ADOC
NOOC
SUSPEND
SCL
I2C-bus
12 MHz
upstream port 0
XTAL1 XTAL2
RREF
VCC2
VCC3
VCC4
VREF(5V0)
POWER
SWITCH
OVERCURRENT
DETECTION
ANALOG
TRANSCEIVER
• ORIGINAL USB
• HI-SPEED USB
downstream
port 1 downstream
port 2 to port 3 downstream
port 4
DM4
DM1 DP1
OC1_N
PSW1_N
GRN1_N
AMB1_N DP4
ISP1520
OC4_N
PSW4_N
GRN4_N
AMB4_N
15 16 19 20 60 61 47 48 25 26 50 51
GND
RESET_N
HUBGL_N
PORT 1 PORT 4PORT 2 to 3
1
49
32
63
64
34334375
9, 39
13, 45
23, 57
11, 41
24, 56
TEST_HIGH
8, 12,
18, 38
2, 6, 10,
14, 21,
22, 35,
40, 42,
46, 58,
59
62
31
TEST_LOW 17