IBM39STB032xx
IBM39STB034xx
Preliminary
STB032xx and STB034xx Digital Set-Top Box Integrated Controllers
Smart Card (SCI) Timing
SYSCLK
SC_CLK
t1
Output
t2
SCn_IO
Output
SCI Timing Values
t1 = (2 x SCCLK_CNT0) SYSCLK periods
t2 = bit width = variable from 32 to 512 SC_clk periods = SCETU x SC_clk periods
Note: SC_DETECT, SC_RESET, SC_SELECT, and SC_VCC_COMMAND are synchronous to the system
clock and are not shown here.
Modem Serial Interface Timing
MODEM_CLK
Input
Input
MODEM_CLK
t1
t1
t2
t2
Input
Input
MODEM_RXD
MODEM_FR
t3
t3
t1
Output
MODEM_TXD
MODEM_FR
t4
t4
Output
Modem CODEC Timing Values
Symbol
Parameter
Min
15
3
Max
Units
ns
T
T
T
T
Input setup time
Input hold time
Output hold time
Output valid time
1
2
3
4
ns
3
ns
16
ns
STB03_sds_041800.fm.01
April 18, 2000
Electrical Information
Page 49 of 55
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