vsc055xkm-01 Maxim Integrated Products, Inc., vsc055xkm-01 Datasheet - Page 37
vsc055xkm-01
Manufacturer Part Number
vsc055xkm-01
Description
Enhanced I?c Backplane Controller
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.VSC055XKM-01.pdf
(133 pages)
- Current page: 37 of 133
- Download datasheet (2Mb)
VSC055-01
Data Sheet
3.2.24 27h: Port Bypass Control 7 (PBC7)
The following table shows the bit assignments for the Port Bypass Control 7 register. This register
functions the same as the Port Bypass Control 0 register except it affects the P4.7 and P4.6 pins.
Register Name:
Address:
Reset Value:
Bit
7
6
5:2
1
0
Bit Label
PBCEN
SDIEN
RES
FB
SD
PBC7
27h
00XX_XX1Xb
Access
R/W
R/W
R
R/W
R/W
Description
Port Bypass Control Enable
When this bit is set, P4.7 and P4.6 are automatically configured as an FB
output pin and an SD input pin. Configurations for these I/O pins that may have
been previously enabled through other control registers are overridden, except
for the bypass select function (bits 6 and 5 of the appropriate bit control
registers).
When this bit is reset, the remaining bits in this register have no effect on the
operation of P4.7 and P4.6.
Signal Detected Interrupt Enable
When this bit is set, the SD input generates an interrupt if a transition occurs
on the pin. If a transition occurs, the INT# pin asserts and a binary value equal
to the address of this register appears in the BCIS register.
When this bit is reset, transitions on the signal detected input do not generate
an interrupt condition.
Reserved.
Force Bypass
This bit controls the P4.7 I/O pin, which is configured as a totem pole output by
setting the PBCEN bit.
When this bit is set, the force bypass input of a PBC/CRU/SDU function is not
enabled and the port bypass circuit is in Normal mode.
When this bit is reset, the force bypass function of a PBC/CRU/SDU function is
enabled and the port bypass circuit is in Bypass mode.
This register bit is automatically cleared when the synchronized and filtered
P4.6 input is LOW, resulting in a maximum latency of 400 ns from detection of
the loss of a high-speed signal to the de-assertion of the P4.7 output.
Note: Because all I/O pins on the device power up as inputs with weak internal
Signal Detected
When the PBCEN bit is set, this bit becomes a read-only indication of the P4.6
I/O pin, which has been connected to the signal detected output of a PBC/
CRU/SDU function.
If this bit is set, the signal detect unit detects a high-speed signal.
If this bit is reset, the signal detect unit does not detect a high-speed signal.
pull-up resistors, it is possible to define the default state of the force bypass
function by using an external pull-down resistor. The default state of the I/O
can be determined by reading this register, because the read value of the
register bits is always available through an input synchronizer and filter. After
the default state is determined, write the default value to the FB bit of this
register and set the PBCEN bit to ensure that the port bypass control functions
are enabled correctly. Additional writes to this register can enable or disable
the force bypass functions at any time as long as the SD input remains HIGH.
37 of 133
January 2008
Revision 4.1
Related parts for vsc055xkm-01
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Nonvolatile Ram Controller Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
3.3v Single-piece 8mb Nonvolatile Sram Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Pon Triplexer Control And Monitoring Circuit Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Ttl Compatible Cmos Analog Switches Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Improved Low-power, Cmos Analog Switches With Latches Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Windows Vista-compliant, Stereo Class Ab Speaker Amplifiers And Directdrive Headphone Amplifiers Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
4a, 20ns, Dual Mosfet Drivers Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Nicd/nimh Battery Fast-charge Controllers Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
3.6v, 1w Autoramping Power Amplifier For 900mhz Applications Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
2.7v, Single-supply, Cellular-band Linear Power Amplifiers Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
5ghz Linear Power Amplifiers Integrated Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Evaluation Kits for the MAX3514
Manufacturer:
Maxim Integrated Products, Inc.
Part Number:
Description:
5v, Differential Input, Directdrive, 130mw Stereo Headphone Amplifiers With Shutdown Products
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Accurate I2c Rtc With Integrated Tcxo/crystal/fram
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Ds1863 Burst-mode Pon Controller With Integrated Monitoring
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet: