FDC37M81x SMSC Corporation, FDC37M81x Datasheet - Page 141
FDC37M81x
Manufacturer Part Number
FDC37M81x
Description
PC98/99 Compliant Enhanced Super I/O Controller
Manufacturer
SMSC Corporation
Datasheet
1.FDC37M81X.pdf
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OSC
Default = 0x04, on
VCC POR, VTR
POR and HARD
RESET
Chip Level
Vendor Defined
Configuration
Address Byte 0
Default
=0
=0
on VCC POR and
HARD RESET
Configuration
Address Byte 1
Default = 0x03
on VCC POR and
HARD RESET
Default = 0x00
on VCC POR and
Hard Reset
Chip Level
Vendor Defined
x
x
F0 (Sysopt=0)
70 (Sysopt=1)
REGISTER
0x29 -0x2A
ADDRESS
0x24 R/W
0x25
0x26
0x27
0x28
Table 53 - Chip Level Registers
Bit [1] PLL Control
= 0
= 1
Bits[3:2] OSC
= 01
= 10
= 00
= 11
Bit [5:4] Reserved, set to zero
Bit [6] 16-Bit Address Qualification
= 0
= 1
Note: For normal operation, bit 6 should be set.
Bit[7] Reserved
Bit[7:1] Configuration Address Bits [7:1]
Bit[0] = 0
See Note 1
See Note 1
Bits[7:0] Reserved - Writes are ignored, reads return
0.
Bit[0] Reserved
Reserved - Writes are ignored, reads return 0.
Bit[7:0] Configuration Address Bits [15:8]
Reserved - Writes are ignored, reads return 0.
PLL is on (backward Compatible)
PLL is off
Osc is on, BRG clock is on.
Same as above (01) case.
Osc is on, BRG Clock Enabled.
Osc is off, BRG clock is disabled.
12-Bit Address Qualification
16-Bit Address Qualification
141
DESCRIPTION
STATE
C
C
C
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