cl-pd6833 Cirrus Logic, Inc., cl-pd6833 Datasheet - Page 35

• Manufacturer Part Number: cl-pd6833
• Description: Pci-to-cardbus Host Adapter
• Manufacturer: Cirrus Logic, Inc.

CL-PD6833
PCI-to-CardBus Host Adapter
3.1.7
3.1.7.1 Socket Power Control
The CL-PD6833 provides two pins to serially control the socket power. These pins have multiple function-
ality to allow the CL-PD6833 to interface with a number of socket power-control chips. Following are the
two socket power-control signalling modes supported by the CL-PD6833:
The socket power-control signalling mode is usually established during power-on reset by the level of pins
131 (SDATA/SMBDATA) and 130 (SLATCH/SMBCLK), but it can also be set by writing to bit 2 of the Misc
Control 3 register. Refer to
Table 3-5.
Texas Instruments TPS2206AIDF Serial Signalling Mode
In this mode, the CL-PD6833 can interface with the Texas Instruments TPS2206AIDF dual-socket PC
Card power interface switch, which uses a three-pin interface: SCLK, SDATA, and SLATCH (refer to
Figure
the system. This serves as a reference clock for the CL-PD6833 and as a clock to the TPS2206AIDF. The
data is serially transferred over SDATA and the latch signal is SLATCH.
June 1998
Texas Instruments TPS2206AIDF or
External Hardware Serial Mode
SMBus (system management bus)
1
Socket Power Signalling Mode
SMBus is a trademark of Intel Corporation.
Texas Instruments TPS2206AIDF Serial Signalling mode
SMBus
3-10). The pin SCLK is connected to the 10–100-kHz (usually 32-kHz) clock typically available on
Socket Power Management Features
Socket Power Control Configuration
ADVANCE DATA BOOK v0.3
system management bus)
Figure 3-10. Power Control Using Texas Instruments
Table 3-5
SLATCH/SMBCLK (130)
SDATA/SMBDATA (131)
CL-PD6833
TPS2206AIDF Serial Signalling Mode
for the configuration of the power-control signalling mode.
SCLK (132)
1
Signalling mode using the Maxim 1601
SLATCH/SMBCLK
(Pin 130)
Pull-down
Pull-up
SDATA
SLATCH
RST#
SCLK
TPS2206AIDF
SDATA
SLATCH
SHDN#
SCLK
INTRODUCTION TO THE CL-PD6833
Misc Control 3
Bit 2
0
1
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