CY82C693UB Cypress Semiconductor Corporation., CY82C693UB Datasheet - Page 40

• Manufacturer Part Number: CY82C693UB
• Description: Hypercache Tm / Stand-alone Pci Peripheral Controller With Usb
• Manufacturer: Cypress Semiconductor Corporation.

Write-Only Shadow Registers
The following registers contain shadowed values for the inter-
nal write-only registers. The shadowed values may be used to
Register 80: DMA1 Write Request Shadow Register (Read/Write)
Register 81: DMA1 Write Single Mask Bit Shadow Register (Read/Write)
Register 82: DMA1 Write Mode Shadow Register (Read/Write)
Register 83: DMA1 Clear Byte Pointer Shadow Register (Read/Write)
Register 84: DMA1 Master Clear Shadow Register (Read/Write)
Register 85: DMA1 Clear Mask Shadow Register (Read/Write)
Register 86: Timer Counter 1 Command Mode Shadow Register (Read/Write)
Register 87: CMOS Battery-Backed RAM Address and NMI Mask Registers Shadow Register (Read/Write)
Register 88: DMA2 Write Request Shadow Register (Read/Write)
Bit
7:0
Bit
7:0
Bit
7:0
Bit
7:0
Bit
7:0
Bit
7:0
Bit
7:0
Bit
7:0
Bit
7:0
Function
This register contains the shadowed value that was written into DMA1’s DMA request
register. (DMA Register 9)
Function
This register contains the shadowed value that was written into DMA1 write single mask bit
register. (DMA Register 10)
Function
This register contains the shadowed value that was written into DMA1 write mode register.
(DMA Register 11)
Function
This register contains the shadowed value that was written into DMA1 Address Space Ex-
pansion Flip-Flop Control Register. (DMA Register 12)
Function
This register contains the shadowed value that was written into DMA1 master clear register.
(DMA Register 13)
Function
This register contains the shadowed value that was written into DMA1 mask clear register.
(DMA Register 14)
Function
This register contains the shadowed value that was written into timer counter 1 command
mode register. (Timer/Counter Register 0)
Function
This register contains the shadowed value that was written into the NMI mask register and
the last accessed address to the CMOS RAM.
Function
This register contains the shadowed value that was written into DMA2’s write request
register. (DMA Register 25)
PRELIMINARY
40
read, mask-off, and then modify certain fields within the
write-only registers.
Index=85H
Index=82H
Index=84H
Index=80H
Index=88H
Index=83H
Index=81H
Index=86H
CY82C693UB
Default
00000000
Default
00000000
Default
00000000
Default
00000000
Default
00000000
Default
00000000
Default
00000000
Default
00000000
Default
00000000
Index=87H