PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 201
PC87307VUL
Manufacturer Part Number
PC87307VUL
Description
PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
Manufacturer
National Semiconductor
Datasheet
1.PC87307VUL.pdf
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13.3.10 Modem Control Timing
Notes:
1. See write cycle timing, Figure 13-4.
2. See read cycle timing, Figure 13-3.
RTS, DTR
WR
(WR MCR)
Note 1
CTS, DSR, DCD
INTERRUPT
RD
(RD MSR)
Note 2
RI
t
t
t
t
t
HL
LH
MDO
RIM
SIM
Symbol
RI2,1 High to Low Transition
RI2,1 Low to High Transition
Delay from WR (WR MCR) to Output
Delay to Reset IRQ from RD (RD MSR)
Delay to Set IRQ from Modem Input
Parameter
t
SIM
FIGURE 13-14. Modem Control Timing
t
MDO
TABLE 13-44. Modem Control Timing
t
RIM
Device Description
201
t
HL
t
SIM
Conditions
t
RIM
t
MDO
Min
10
10
t
LH
t
Max
SIM
40
78
40
www.national.com
nsec
nsec
nsec
nsec
nsec
Unit
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