IA82050_11 Datasheet, PDF (17/22 Pages) InnovASIC, Inc – Asynchronous Serial Controller

IA82050
Asynchronous Serial Controller
7. AC Characteristics
Table 10. AC Characteristics
Parameter
CLK period
CLK period
CLK Low Time
CLK High Time
CLK Rise Time
Min
54 ns
54 ns
25 ns
25 ns
Max
250 ns
108 ns
10 ns
CLK Fall Time
10 ns
CLK Rise Time
CLK Fall Time
Crystal Frequency
Reset Width
RTS/DTR Low Setup to
Reset inactive
RTS/DTR Low Hold after
Reset inactive
RDn Active Width
Address/CSn Setup Time to
RDn Active
Address/CSn Hold after
RDn Inactive
RDn or WRn Inactive to
Active Delay
Data Out Float Delay after
RDn Inactive
WRn Active Width
Address CSn Setup Time to
WRn Active
Address and CSn hold
Time after WRn
Data in Setup Time to WRn
Inactive
Data In Hold Time after
WRn Inactive
SCLK Period
SCLK Period
RXD Setup Time to SCLK
High
RXD Hold Time after SCLK
High
TXD Valid after SCLK Low
TXD Delay after RXD
1 Mhz
8 * Clock Period
6 * Clock Period
2* clock period
+ 65 ns
7 ns
0 ns
Clock Period +
15 ns
2 * Clock Period
+ 15 ns
7 ns
0 ns
90 ns
12 ns
216 ns
3500 ns
250 ns
250 ns
15 ns
15 ns
20 Mhz
Clock Period
– 20 ns
40 ns
170 ns
170 ns
Data Sheet
February 25, 2011
Notes
Divide by Two
No Divide by
Divide by Two
Measured between 0.3 *
VDD and 0.7 * VDD
Divide by Two
Measured between 0.3 *
VDD and 0.7 * VDD
No Divide by
No Divide by
16x Clocking Mode
1x Clocking Mode
Remote Loopback
®
IA211030617-08
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