Ricoh R5C841 - Manual (Page 35)

R5C841 PCI-CardBus/IEEE 1394/SD Card/Memory Stick/xD/ExpressCard Data Sheet
12345  2004 R EV .1.10 4-10
≡Reset Sequence≡
Follow the sequence for initialization when a power is on.
1. Supply a power to VCC_3V, AVCC_PHY3V, VCC_MD3V, VCC_RIN and
VCC_ROUT*. (*: in case of an internal regulator disabled )
2. Supply a power to VCC_PCI3V.
3. Deassert GBRST#.
4. Deassert HWSPND#.
5. Deassert PCIRST#. (PCLK has to be supplied for 100µsec@33MHz before
deasserting PCIRST#.)
Following Step3 by Step2 has no problem.
See the timing a detail of the timing shown in Chapter 5.3.6.
4.11 Power Management
The R5C841 implements two kinds of power management, software suspend mode and
hardware suspend mode, in order to reduce the power consumption on suspend, in addition to
the adoption of circuit to reduce the power consumption when power on. The software suspend
mode conforms to the ACPI (Advanced Configuration and Power Interface) specification and the
PCI Bus Power Management Standard. The R5C841, as a PCI device, implements four power
states of D0, D1, D2, and D3. Each power state on the PC Card is the following.
The power management events for the R5C841 and their sources are listed below. The PME#
source supports the Card Detect Change event only.
When the power state is except D0, the interrupt is disabled and only PME# can be asserted.
Event Source
Card Detect Change R5C841
Ready/Busy change card
Battery Warning card
Ring Indicate (Card Status Change) card
1394 LINKON R5C841
SD Card Detect Change R5C841
Memory Stick Detect Change R5C841
xD Picture Card Detect Change R5C841
4.11.1 Function on PC Card
D0 The maximum powered state. All PCI transactions are acceptable.
D1 Only the PCI Configuration Space access is allowed while the power and clock are provided.
CardBus CLK is output.
D2 Only the PCI Configuration Space access is allowed while the power and clock are provided.
CardBus CLK is stopped by the protocol of CLKRUN.
D3hot Only the PCI Configuration Space access is allowed while the power and clock are provided.
CardBus CLK is stopped compulsorily. If CardBus card is inserted, CardBus RESET# is
asserted at the same time this state is set. When the function is brought back to the D0 state,
the reset is automatically performed regardless of the assertion of PCIRST#. PCI interface is
disabled when reset. CardBus interface is reset by the assertion of CRST# on CardBus card.
D3cold PCI-CardBus Bridge defines D3cold state is to change from VCC_RIN, VCC_ROUT*, VCC_3V
and VCC_MD3V to the auxiliary power source. The R5C841 supports power management
events from D3cold with the auxiliary power source. The R5C841 can generate PME# even in
D3cold state without PCI clock if the event source is Card Detect Change or Ring Indicate.
*: in case of an internal regulator disabled