2-9
AC Timings
Table 2-12. External Configuration Signals
Pin Description
Settings
RSTCONF
Reset Configuration
Input line sampled by the MSC8101 at the rising
edge of PORESET.
0
Reset Configuration Master.
1
Reset Configuration Slave.
DBREQ/
EE0
EONCE Event Bit 0
Input line sampled after SC140 core PLL locks.
Holding EE0 high when PORESET is deasserted
puts the SC140 core into Debug mode.
0
SC140 core starts the normal processing
mode after reset.
1
SC140 core enters Debug mode immediately
after reset.
HPE/EE1
Host Port Enable
Input line sampled at the rising edge of PORESET.
If asserted, the Host port is enabled, the system
data bus is 32-bit wide, and the Host
must
program the reset configuration word.
0
Host port disabled (hardware reset
configuration enabled).
1
Host port enabled.
BTM[0–1]/
EE[4–5]
Boot Mode
Input lines sampled at the rising edge of
PORESET, which determine the MSC8101 Boot
mode.
00 MSC8101 boots from external memory.
01 MSC8101 boots from HDI16.
10 Reserved.
11 Reserved.
Table 2-13. Reset Timing
No.
Characteristics
Expression
Min
Max
Unit
1
Required external PORESET duration minimum
•
CLKIN = 18 MHz
•
CLKIN = 75 MHz
16
/
CLKIN
888.8
213.3
—
—
ns
ns
2
Delay from deassertion of external PORESET to
deassertion of internal PORESET
•
CLKIN = 18 MHz
•
CLKIN = 75 MHz
1024
/
CLKIN
56.89
13.65
µ
s
µ
s
3
Delay from deassertion of internal PORESET to SPLL lock
•
SPLLMFCLK = 18 MHz
•
SPLLMFCLK = 25 MHz
800
/
SPLLMFCLK
44.4
32.0
µ
s
µ
s
4
Delay from SPLL lock to DLL lock
•
DLL enabled
— BCLK = 18 MHz
— BCLK = 75 MHz
•
DLL disabled
3073
/
BLCK
—
170.72
40.97
0.0
µ
s
µ
s
ns
5
Delay from SPLL lock to HRESET deassertion
•
DLL enabled
— BCLK = 18 MHz
— BCLK = 75 MHz
•
DLL disabled
— BCLK = 18 MHz
— BCLK = 75 MHz
3585
/
BLCK
512
/
BLCK
199.17
47.5
28.4
6.83
µ
s
µ
s
µ
s
µ
s
6
Delay from SPLL lock to SRESET deassertion
•
DLL enabled
— BCLK = 18 MHz
— BCLK = 75 MHz
•
DLL disabled
— BCLK = 18 MHz
— BCLK = 75 MHz
3588
/
BLCK
515
/
BLCK
199.33
47.84
28.61
6.87
µ
s
µ
s
µ
s
µ
s
Note:
Value given for lowest possible CLKIN frequency 18 MHz to ensure proper initialization of reset sequence.