CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 20

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Versatile input filtering is available for each GPIO input.
Each preliminary input is optionally connected to a digital
filter circuit that is optionally followed by an event counter.
Lastly followed by an edge detector that together provide
eight different ICFs (input conditioning functions), plus an
auto-sense feature for determining the initial condition of
the pin.
2.6.9
This module contains eight Multi-Function General Pur-
pose Timers (MFGPTs), six are in the normal V
power domain, while the other two are in the Standby
power domain. The timers are very versatile and can be
configured to provide a Watchdog timer (trigger GPIO out-
put, interrupt or reset), perform Pulse Width Modulation
(PWM) or Pulse Density Modulation (PDM), create Blink
(low frequency pulse for LED), generate GPIO outputs, or
act as general purpose timers.
Each MFGPT operates independently and has the follow-
ing features:
• 32 kHz or 14.318 MHz clock selectable by software
• MFGPT6 and MFGPT7, in Standby power domain, use
• Programmable input clock prescaler divisor to divide
• Provide outputs for generating reset (limited to MFGPT0
2.6.10
The Geode CS5535 companion device has a Flash device
interface that supports popular NOR Flash and inexpen-
sive NAND Flash devices. This interface is shared with the
IDE interface (ATA-5 Controller (ATAC)), using the same
balls. NOR or NAND Flash may co-exist with IDE devices
using PIO (Programmed I/O) mode. The 8-bit interface
supports up to four “lanes” of byte-wide Flash devices
through use of four independent chip selects, and allows
for booting from the array. Hardware support is present for
SmartMedia-type ECC (Error Correction Code) calcula-
tions, off-loading software from having to support this task.
All four independent chip selects may be used as general
purpose chip selects to support other ISA-like slave
devices. Up to 1 kB of address space (without external
latches) may be supported using these signals.
2.6.11
The Geode CS5535 companion device maintains a real-
time clock for system use. The clock is powered by an
external battery and so continues to keep accurate time
even when system power is removed. The clock can be set
to make automatic Daylight Savings Time changes in the
spring and fall without user intervention. There are sepa-
20
(applies to MFGPT0 to MFGPT5, in Working power
domain, only).
32 kHz clock.
input clock by 2
to MFGPT5), IRQs, NMI, and ASMIs (indirectly through
PICs).
Multi-Function General Purpose Timers
Flash Interface
Real-Time Clock with CMOS RAM
i
, where i = 0 to 15.
31506B
DD
Working
rate registers for seconds, minutes, hours, days (both day
of the week and day of the month), months, and years.
Alarms can be set for any time within the range of these
registers, which have a 100-year capability. The clock uses
an external 32 kHz oscillator or crystal as the timing ele-
ment.
The same battery that keeps the clock continuously pow-
ered also provides power to a block of 242 bytes of CMOS
RAM, used for storing non-volatile system parameters.
2.6.12
The Geode CS5535 companion device has state-of-the-art
power management capabilities designed into every mod-
ule. Independent clock controls automatically turn clocks
off to sections of the chip that are not being used, saving
considerable power. In addition, the chip supports full
Sleep and Wakeup states with multiple methods of induce-
ment. A suite of external signals support power manage-
ment of devices on the system board. Legacy Power
Management (PM), Advanced Power Management (APM),
and Advanced Configuration and Power Interface (ACPI)
techniques and requirements are supported. The GPIO
subsystem can be configured to transmit any of several
wakeup events into the system.
The Geode CS5535 companion device is divided into two
main power domains: Working and Standby, plus circuits
such as the real-time clock and CMOS RAM that are bat-
tery-backed. Most of the Geode CS5535 companion
device is in the Working power domain, except for
GPIO[31:24] and MFGPT[7:6]. This allows these devices
to be used for wakeup events or output controls.
2.7
The GeodeLink Interface Unit (GLIU) makes up the internal
bus derived from the GeodeLink architecture. It has eight
ports, one of which is dedicated to itself, leaving seven for
use by internal GeodeLink devices. Figure 1-1 "Block Dia-
gram" on page 13 shows this device as the central element
of the architecture, though its presence is basically trans-
parent to the end user.
2.8
The Low Voltage Detect (LVD) circuit monitors: Standby
I/O voltage, Standby Core voltage, and Working Core volt-
age. Working I/O voltage is not monitored and is assumed
to track with Working Core voltage. The LVD monitors
these voltages to provide Working and Standby power-
good signals (resets) for the respective working and
standby power domains. Additionally, the PMC monitors
the working power-good signal to shut-down and/or re-start
the system as appropriate.
AMD Geode™ CS5535 Companion Device Data Book
Power Management Controller
GeodeLink™ Interface Unit
Low Voltage Detect
Architecture Overview