FDC37M81 SMSC [SMSC Corporation], FDC37M81 Datasheet - Page 179

• Manufacturer Part Number: FDC37M81
• Description: PC98/99 Compliant Enhanced Super I/O Controller with Keyboard/Mouse Wake-Up
• Manufacturer: SMSC [SMSC Corporation]

Note 1: tBR is 1/Baud Rate. The Baud Rate is programmed through the divisor latch registers. Baud
Rates have percentage errors indicated in the “Baud Rate” table in the “Serial Port” section.
NAME
NAME
NAME
nRTSx,
nDTRx
t1
nIOW
t1
t1
t2
PCI_CLK
SER_IRQ
TXD1, 2
nRTSx, nDTRx Delay from nIOW
Serial Port Data Bit Time
SER_IRQ Setup Time to PCI_CLK Rising
SER_IRQ Hold Time to PCI_CLK Rising
Data
Start
FIGURE 12C – SETUP AND HOLD TIME
DESCRIPTION
FIGURE 12A – SERIAL PORT DATA
FIGURE 12 - SERIAL PORT TIMING
DESCRIPTION
DESCRIPTION
t1
t1
Data (5-8 Bits)
179
t1
MIN
MIN
MIN
t2
7
0
Parity
tBR1
TYP
TYP
TYP
Stop (1-2 Bits)
MAX
MAX
MAX
200
UNITS
UNITS
UNITS
nsec
nsec
nsec
ns