ISP1130 Datasheet, PDF (5/68 Pages) NXP Semiconductors – Universal Serial Bus compound hub with integrated keyboard controller

Philips Semiconductors
ISP1130
USB compound hub with keyboard controller
5.2 Pin description
Table 2: Pin description (SSOP56 and SDIP56)
Symbol ^[1]
Pin
Type Description
XTAL1
1
I
crystal oscillator input (6 MHz)
XTAL2
2
O
crystal oscillator output (6 MHz)
RESET
3
I
reset input (Schmitt trigger); a LOW level produces an
asynchronous reset; connect to V_CC for power-on reset
(internal POR circuit)
V_CC
GND
4
-
5
-
supply voltage; connect to USB supply V_BUS
ground supply
V_pu(3.3)
6
-
regulated supply voltage (3.3 V ± 10%) from internal
regulator; used to connect pull-up resistor on UP_DP line;
pin function is controlled via the Device Status Register
(see Table 36):
UP_DM
Connect = 0 — V_pu(3.3) floating (high impedance)
Connect = 1 — V_pu(3.3) = 3.3 V
7
AI/O upstream port D− connection (analog)
UP_DP
8
AI/O upstream port D+ connection (analog)
DN1_DM
9
AI/O downstream port 1 D− connection (analog)
DN1_DP
10
AI/O downstream port 1 D+ connection (analog)
DN2_DM
11
AI/O downstream port 2 D− connection (analog)
DN2_DP
12
AI/O downstream port 2 D+ connection (analog)
PSW1
13
O
power switch control output for downstream port 1
(open-drain)
PSW2
14
O
power switch control output for downstream port 2
(open-drain)
OC1/DPGL1 15
AI/O pin function is controlled via the USBCON register (see
Table 53):
EnableOverCurrent = 0 — GoodLink LED indicator output
for downstream port 1 (analog, open-drain); to connect an
LED use a 330 Ω series resistor
EnableOverCurrent = 1 — overcurrent sense input for
downstream port 1 (analog or digital); overcurrent sensing
can be either analog (AnalogOCDisable = 0) or digital
(AnalogOCDisable = 1)
OC2/DPGL2 16
AI/O pin function is controlled via the USBCON register (see
Table 53):
EnableOverCurrent = 0 — GoodLink LED indicator output
for downstream port 2 (analog, open-drain); to connect an
LED use a 330 Ω series resistor
EnableOverCurrent = 1 — overcurrent sense input for
downstream port 2 (analog or digital); overcurrent sensing
can be either analog (AnalogOCDIsable = 0) or digital
(AnalogOCDisable = 1)
GND
17
-
ground supply
MX0
18
I
keyboard matrix return line (5 V tolerant, open drain) ^[2]
MX1
19
I
keyboard matrix return line (5 V tolerant, open drain) ^[2]
9397 750 06895
Objective specification
Rev. 01 — 23 March 2000
© Philips Electronics N.V. 2000. All rights reserved.
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