FDC37C669-MS Standard Microsystems (SMSC), FDC37C669-MS Datasheet - Page 121

• Manufacturer Part Number: FDC37C669-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C669-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

CR01
This register can only be accessed in the Configuration
Mode
CR02
This
Configuration Mode and after the CSR has been
Note_PWRDN:
BIT NO.
BIT NO.
0,1
5,6
0:2
4:6
2
3
4
7
3
7
register
and
Reserved
Parallel Port
Power (see note
_PWRDN)
Parallel Port
Mode
Reserved
Reserved
Lock CRx
Reserved
UART1 Power
down (see note
_PWRDN)
Reserved
UART2 Power
down
Power Down bits disable the respective logical device and associated pins, however the power down
bit does not disable the selected address range registers for the logical device. To disable the host
address registers the logical device's base address must be set below 100h. Therefore devices which
are powered down, but still reside at a valid I/O base address will participate in Plug-and-Play range
checking.
can
BIT NAME
BIT NAME
after
only be
the
Read Only. A read returns a 0.
A high level on this bit, supplies power to the Parallel Port (Default).
A low level on this bit puts the Parallel Port in low power mode.
Parallel Port Mode. A high level on this bit, sets the Parallel Port for
Printer Mode (Default). A low level on this bit enables the Extended
Parallel port modes. Refer to Bits 0 and 1 of CR4
Read Only. A read returns a 1.
Read Only. A read returns a 0.
A high level on this bit enables the reading and writing of CR00-
CR18 (Default). A low level on this bit disables the reading and
writing of CR0-CRF. Once set to 0, this bit can only be set to 1 by a
hard reset or power-up reset.
Read Only. A read returns a 0.
A high level on this bit, allows normal operation of the Primary Serial
Port (Default). A low level on this bit places the Primary Serial Port
into Power Down Mode.
Read Only. A read returns a 0.
A high level on this bit, allows normal operation of the Secondary
Serial Port (Default). A low level on this bit places the Secondary
Serial Port into Power Down Mode.
accessed
CSR
in
Table 48 - CR01
Table 49 - CR02
has
the
121
been initialized to 01H. The default value of this register
after power up is 9CH.
initialized to 02H. The default value of this register after
power up is 88H.
DESCRIPTION
DESCRIPTION