ISP1130DL Philips Semiconductors, ISP1130DL Datasheet - Page 7

• Manufacturer Part Number: ISP1130DL
• Description: Universal Serial Bus compound hub with integrated keyboard controller
• Manufacturer: Philips Semiconductors

6. Functional description
Philips Semiconductors
9397 750 06895
Objective specification
Table 2:
[1]
[2]
[3]
The ISP1130 is a compound USB hub with an integrated keyboard controller. It has 2
bus-powered downstream ports with 3 non-removable embedded functions, the first
of which is dedicated to the keyboard function. The downstream ports can be used to
connect low-speed or full-speed USB peripherals, such as a mouse, printer, another
keyboard or another hub. The block diagram is shown in
The embedded functions have no external hardware connections. They provide USB
endpoints for equipment functions implemented by a microcontroller. Each endpoint
has an associated FIFO buffer in the on-board RAM, which can be accessed by the
integrated microcontroller via memory mapped registers using special commands
(see
An optional serial I
EEPROM access, allowing the user to program the vendor ID, product ID or activate
the built-in keyboard matrix.
Symbol
MEMSEL/
UPGL
SYNCLK
EA
ALE
PSEN
INT
SCRLOCK
NUMLOCK
CAPSLOCK
GND
Symbol names with an overscore (e.g. NAME) indicate active LOW signals.
MXn pins have an internal 8.2 k pull-up resistor.
MYn pins have an internal 82 k pull-down resistor (keyboard matrix enabled) or an internal 8.2 k
pull-up resistor (keyboard matrix disabled). This is controlled by bit DisableKBDMatrix in the USBCON
register, see
Section
[1]
Pin description (SSOP56 and SDIP56)
9).
Table
Pin
47
48
49
50
51
52
53
54
55
56
Rev. 01 — 23 March 2000
2
53.
C-bus interface (see
Type
O
O
I
O
O
I
O
O
O
-
Description
pin function is controlled via the USBCON register (see
Table
GL-MEMSELSelection = 0 — upstream port GoodLink
indicator output (open-drain)
GL-MEMSELSelection = 1 — chip select output for
external serial EEPROM (open-drain)
embedded microcontroller clock output; used for emulation
External Address enable input (internal pull-up); used to
access external memory
Address Latch Enable output; used to demultiplex AD0
during external memory access
Program Store ENable output; selects external memory for
program execution
external interrupt input (edge-triggered)
control output for Scroll Lock LED (open-drain)
control output for Num Lock LED (open-drain)
control output for Caps Lock LED (open-drain)
ground supply
53):
USB compound hub with keyboard controller
Section
…continued
11) is provided for external
Figure
© Philips Electronics N.V. 2000. All rights reserved.
1.
ISP1130
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