參數(shù)資料
型號(hào): DZPD6710VCB
廠商: INTEL CORP
元件分類: 總線控制器
英文描述: ISA-to-PC-Card (PCMCIA) Controllers
中文描述: PCMCIA BUS CONTROLLER, PQFP144
封裝: LQFP-144
文件頁數(shù): 73/138頁
文件大?。?/td> 723K
代理商: DZPD6710VCB
ISA-to-PC-Card (PCMCIA) Controllers
PD6710/
22
Datasheet
73
Bit 0
Bypass Frequency Synthesizer
This bit determines internal time base.
Bit 1
Low-Power Dynamic Mode
This bit determines whether Low-Power Dynamic mode is enabled. For maximum operational
power savings, keep this bit set to
1
.
Bit 2
Suspend
This bit enables Suspend mode. After entering Suspend, AEN should be pulled high for lowest
power consumption. When this bit is high and AEN is high, all ISA bus interface inputs are turned
off. In 82386SL systems when the processor is in Suspend mode, the ISA bus interface signals
float; this feature will prevent high current flow in the PD67XX inputs.
Bit 3
5V Core
This bit selects input threshold circuits for use when 3.3 or 5.0 volts is connected to the PD67XX
CORE_VDD pins. This bit must be set to
0
when the CORE_VDD pins are connected to 3.3 volts
to preserve TTL-compatible input thresholds to the card socket.
Bit 4
Drive LED Enable
Note:
This bit should be set to
0
if in Memory Card Interface mode. This bit determines whether -SPKR
is used to drive an LED on the IRQ12 (
Table 1
) for disk drives.
0
Normal operation, internal clock = CLK input frequency x 7/4.
1
Internal clock = CLK input frequency (see
Table 1
).
0
Clock runs always.
1
Normal operation, stop clock when possible.
0
Normal operation.
1
Stop Frequency Synthesizer, enable all Low-Power modes and disable socket access.
0
Normal operation: use when CORE_VDD pin is connected to 3.3 volts.
1
Selects input thresholds for use when 5.0 volts is connected to the PD67XX CORE_VDD pins.
0
IRQ12 operates normally.
1
IRQ12 becomes an open-drain output suitable for driving an LED (driven whenever the card -
SPKR output is turned on, and the corresponding Speaker Is LED input bit (see
Bit 1
Speaker Is LED Input
on page 76
) is set).
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