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参数资料
| 型号： | SPD6729QCE |
| 厂商： | INTEL CORP |
| 元件分类： | 总线控制器 |
| 英文描述： | PCMCIA BUS CONTROLLER, PQFP208 |
| 封装： | MQFP-208 |
| 文件页数： | 41/116页 |
| 文件大小： | 1442K |
| 代理商： | SPD6729QCE |
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PD6729 — PCI-to-PC Card (PCMCIA) Controller
30
Datasheet
The PD6729 power can be further managed by controlling socket power as outlined in “Socket
Power Management Features” on page 30. Socket power can be turned on and off through software
or automatically when cards are inserted or removed. The PD6729 provides six pins per socket for
controlling external logic to switch VCC and VPP voltages on and off and for sensing a card’s
operating voltage range. Cards can be turned off when they are not in use.
3.1.6
Socket Power Management Features
Card Removal
When a card is removed from a socket, the PD6729 by default automatically disables the VCC and
VPP supplies to the socket. If Extension Control 1 register bit 1 is a ‘1’, Power Control register
bit 4 is prevented from being automatically cleared when a card is removed. The PD6729 can also
be configured to have management interrupts notify software of card removal.
Card Insertion
At reset, and whenever there is no card in a socket, power to the socket is off. When a card is
detected (card detect input pins, -CD1 and -CD2, to the PD6729 become asserted low), two
independent actions can be programmed to occur.
If the PD6729 has been set for automatic power-on (Power Control register bits 4 and 5 are both
‘1’s), the PD6729 automatically enables the socket VCC supply (and, if so programmed, VPP
supply).
If the PD6729 has been programmed to cause management interrupts for card-detection events,
assertion of -CD1 and -CD2 to the PD6729 causes a management interrupt to be generated to
inform system software that a card was inserted. In the case of manual power detection (Power
Control register bits 5 is a ‘0’), system software can then determine the card’s operating voltage
range and then power-up the socket and initialize the card, or if programmed for automatic power-
on (Power Control register bits 5 is a ‘1’ and Extension Control 1 register bit 1 is a ‘1’), simply
initialize the card.
Table 6.
PD6729 Power-Management Modes
Mode Name
RST#
Level
Misc Control 2 Register
Functionality
Typical Power
Consumption
(PCI_VCC = 5.0V,
PCI_K = 33 MHz,
CORE_VDD = 3.3V,
+5V = 5.0V)
Suspend
Mode
(Bit 2)
Low-Power
Dynamic
Mode
(Bit 1)
Low-power Dynamic
(default)
High
0
1
Full functionality
6.4 mW
Normal
High
0
Full functionality
14 mW
Suspend
(software-controlled)
High
1
–
8-bit access to Misc
Control 2 register. No
other register access.
No card in socket(s).
6.4 mW
Reset
Low
––
No register access.
No card in socket(s).
System bus signals
disabled.
21 mW
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