W83877ATG Nuvoton Technology Corporation of America, W83877ATG Datasheet - Page 143

• Manufacturer Part Number: W83877ATG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83877ATG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

11.2.38
When the device is in Extended Function mode and EFIR is 2eH, the CR2E register can be accessed
through EFDR. The bit definitions are as follows:
ENPNF (Bit 0):
nEN16SA (Bit 1):
INVRD (Bit 2):
EN24MX2:
DIS_BST(Bit3): Disable FDC DMA Burst Mode.
11.2.39
When the device is in Extended Function mode and EFIR is 31H, the CR31 register can be accessed
through EFDR. The bit definitions are as follows:
0
1
0
1
1
0
1
0
1
0
Configuration Register 2E (CR2E), default = 2eH
Configuration Register 31 (CR31), default=00H
Disable Printer Not Floppy function. (Default)
Enable Printer Not Floopy function.
Enable 16-bit address decoder in the ISA bus. If the function of full ISA address
decoder is used, the device of COM B will be Changed to SIR/FIR function
automatically.
Disable 16-bit address decoder in the ISA bus.
Disable inverting RDATA from floppy disk input signal. (Default)
Enable inverting RDATA from floppy disk input signal.
Using internal circuit type one to generate 48M Hz when CLKIN is 24M Hz. (Default)
Using internal circuit type two to generate 48M Hz when CLKIN is 24M Hz.
Enable FDC burst mode. (Default)
Disable FDC burst mode.
7
7
6
6
5
5
4
4
3
3
- 136 -
2
2
W83877ATF/W83877ATG
1
1
0
0
nEN16SA
ENPNF
INVRD
EN24X2M
DIS_BST
Reserved
Reserved
Reserved
reserved
reserved
IRQMODS
reserved
SCIIRQ0
SCIIRQ1
SCIIRQ2
SCIIRQ3