SC2200UFH-300 AMD (ADVANCED MICRO DEVICES), SC2200UFH-300 Datasheet - Page 93

• Manufacturer Part Number: SC2200UFH-300
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of SC2200UFH-300

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

SuperI/O Module
Write accesses to unimplemented registers (i.e., accessing
the Data register while the Index register points to a non-
existing register or the LDN is 07h or higher than 08h), are
ignored and a read returns 00h on all addresses except for
74h and 75h (DMA configuration registers) which returns
04h (indicating no DMA channel is active). The configura-
tion registers are accessible immediately after reset.
5.3.3
The device has four reset types:
Software Reset
This reset is generated by bit 1 of the SIOCF1 register,
which resets all logical devices. A software reset also
resets most bits in the SIO Configuration and Control regis-
ters (see Section 5.4.1 on page 103 for the bits not
affected). This reset does not affect register bits that are
locked for write access.
Hardware Reset
This reset is activated by the system reset signal. This
resets all logical devices, with the exception of the RTC and
the SWC, and all SIO Configuration and Control registers,
with the exception of the SIOCF2 register. It also resets all
SuperI/O control and configuration registers, except for
those that are battery-backed.
V
This reset is activated when either V
on after both have been off. V
which is a combination of V
V
in Section 9.1.4 "Operating Conditions" on page 370; oth-
erwise, V
all registers whose values are retained by V
V
This is an internally generated reset that resets the SWC,
excluding those SWC registers whose values are retained
by V
The SIO module wakes up with the default setup, as fol-
lows:
AMD Geode™ SC2200 Processor Data Book
PP
SB
SB
Power-Up Reset
if V
PP
Power-Up Reset
. This reset is activated after V
SB
BAT
Default Configuration Setup
is greater than the minimum (Min) value defined
is used as the V
SB
PP
and V
PP
source. This reset resets
is an internal voltage
SB
BAT
SB
or V
. V
is powered up.
PP
PP.
BAT
is taken from
is powered
• When a hardware reset occurs:
• When either a hardware or a software reset occurs:
5.3.4
A full 16-bit address decoding is applied when accessing
the configuration I/O space, as well as the registers of the
functional blocks. However, the number of configurable bits in
the base address registers vary for each device.
The lower 1, 2, 3 or 4 address bits are decoded within the
functional block to determine the offset of the accessed
register, within the device’s I/O range of 2, 4, 8 or 16 bytes,
respectively. The rest of the bits are matched with the base
address register to decode the entire I/O range allocated to
the device. Therefore the lower bits of the base address
register are forced to 0 (RO), and the base address is
forced to be 2, 4, 8 or 16 byte aligned, according to the size
of the I/O range.
The base address of the RTC, Serial Port 1, Serial Port 2,
and the Infrared Communication Port are limited to the I/O
address range of 00h to 7Fxh only (bits [15:11] are forced
to 0). The Parallel Port base address is limited to the I/O
address range of 00h to 3F8h. The addresses of the non-
legacy devices are configurable within the full 16-bit
address range (up to FFFxh).
In some special cases, other address bits are used for
internal decoding (such as 10 in the Parallel Port). For
more details, please see the detailed description of the
base address register for each specific logical device.
— The configuration base address is 2Eh, 15Ch or
— All Logical devices are disabled, with the exception of
— The legacy devices are assigned with their legacy
— The AMD proprietary functions are not assigned with
None, according to the IO_SIOCFG_IN bit values, as
shown in Table 5-1 on page 98.
the RTC and the SWC, which remains functional but
whose registers cannot be accessed.
system resource allocation.
any default resources and the default values of their
base addresses are all 00h.
Address Decoding
32580B
99