ISP1130DL Philips Semiconductors, ISP1130DL Datasheet - Page 38

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

Table 55: USBCONA register: bit allocation
Philips Semiconductors
9397 750 06895
Objective specification
Bit
Symbol
Reset
Access
W
7
0
10.3.4 USB Control A register (USBCONA)
Table 54: USBCON register: bit description
Table 56: USBCONA register: bit description
Bit
7
6
5
4
3
2
1
0
Bit
7 to 2
1, 0
W
6
0
Symbol
-
PortCount[1:0] number of enabled embedded functions:
Symbol
Self
Powered
Enable
SYNCLK
Disable
KBDMatrix
GL-
MEMSEL
Selection
Enable
Over
Current
AnalogOC
Disable
Soft
Connect_N
Suspend
Clock
W
5
0
Rev. 01 — 23 March 2000
reserved
Description
A logic 0 selects bus-powered operation. A logic 1 enables (hybrid)
self-powered operation.
A logic 1 enables a 12 MHz clock signal on output SYNCLK, used
during external emulation of the microcontroller. A logic 0 disables
the clock signal on SYNCLK.
A logic 0 selects internal 82 k pull-down resistors on the MYn
lines (keyboard matrix enabled). A logic 1 selects internal 8.2 k
pull-up resistors on the MYn lines (keyboard matrix disabled).
A logic 0 enables upstream GoodLink indication, using output
MEMSEL/UPGL to drive the LED. A logic 1 configures pin
MEMSEL/UPGL as a chip select output for accessing an external
serial EEPROM via the I
A logic 1 configures pins OCn/DPGLn as overcurrent detection
inputs. A logic 0 configures pins OCn/DPGLn as downstream port
GoodLink indicator outputs.
A logic 0 enables internal analog overcurrent sensing on pins
OCn/DPGLn (if enabled via bit EnableOverCurrent). A logic 1
selects digital overcurrent sensing.
A logic 0 connects an internal 1.5 k pull-up resistor to the
upstream USB port (pin UP_DP). A logic 1 disables the pull-up
resistor.
A logic 1 switches off the clock after 2 ms following a ‘suspend’
interrupt. A logic 0 causes the clock to remain active during
‘suspend’ state. A change from logic 0 to logic 1 in the ‘suspend’
interrupt service routine switches off the clock after 1 ms.
Description
reserved
00 — undefined
01 — 1 embedded function (default)
10 — 2 embedded functions
11 — 3 embedded functions
W
4
0
USB compound hub with keyboard controller
W
3
0
2
C-bus interface.
W
2
0
© Philips Electronics N.V. 2000. All rights reserved.
PortCount1
W
1
0
ISP1130
PortCount0
W
0
1
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