參數(shù)資料
型號： PCI1620PDV
英文描述： Controller Miscellaneous - Datasheet Reference
中文描述： 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁數(shù)： 51/164頁
文件大小： 720K
代理商： PCI1620PDV
3
–
9
System designs with a requirement to provide the newer UltraMedia-compatible 1.8-V Vpp core voltage should select
the TI TPS2228 switch and set the VPP1_8_SEL bit (bit 8) of the the general control register (offset 86h, see Section
4.33) to 1. For system designs with a requirement to supply the 12-V Vpp programming voltage, the TI TPS2226
power-interface switch is the best choice, and requires both VPP12_EN and VPP1_8_SEL (bits 9 and 8) of the
general control register (offset 86h, see Section 4.33) to be set to 1. Furthermore, it is possible to provide 1.8 V Vpp
using the TPS2226 by supplying the 12-V switch input terminal with 1.8 volts, clearing both VPP12_EN and
VPP1_8_SEL (bits 9 and 8) of the general control register (offset 86h, see Section 4.33). Lastly, both the TPS2226
and TPS2228 switches are available in pin compatible (30-pin) packages that allow system designers the ability to
provide for either voltage level in a single design.
Figure 3
–
5 illustrates a typical application using the TPS222X with the PCI1620 UltraMedia controller.
(The data
sheets for the individual TI TPS222x power-interface switches should be consulted for a complete overview of
backward and forward compatibility.)
3
VPP1
VPP2
VCC
VCC
PC/UltraMedia
Card A
TPS222X
VPP1
VPP2
VCC
VCC
PC/UltraMedia
Card B
AVPP
AVCC
AVCC
AVCC
BVPP
BVCC
BVCC
BVCC
12 V
5 V
3.3 V
1.8 V
RESET
Serial P2C
Power Supply
12 V
5 V
3.3 V
1.8 V
Supervisor
PCI1620
UltraMedia option. 1.8-V input available on TPS2228
Figure 3
–
5. TPS222X Typical Application
3.5.4
Zoomed Video Support
The PCI1620 allows for the implementation of zoomed video (ZV) for PC Cards. Zoomed video is supported by setting
bit 6 (ZVENABLE) in the card control register (PCI offset 91h, see Section 4.40) on a per-socket function basis.
Setting this bit puts 16-bit PC Card address lines A25
–
A4 of the PC Card interface in the high-impedance state. These
lines can then transfer video and audio data directly to the appropriate controller. Card address lines A3
–
A0 can still
access PC Card CIS registers for PC Card configuration. Figure 3
–
6 illustrates a PCI1620 ZV implementation.
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