參數(shù)資料
型號(hào)： MSC8101M1375C
廠商： MOTOROLA INC
元件分類： 數(shù)字信號(hào)處理
英文描述： Network Digital Signal Processor
中文描述： 64-BIT, 68.75 MHz, OTHER DSP, PBGA332
封裝： 17 X 17 MM, LIDDED FLIP CHIP, PLASTIC, BGA-332
文件頁(yè)數(shù)： 49/104頁(yè)
文件大?。?/td> 877K
代理商： MSC8101M1375C
AC Timings
MSC8101 Technical Data, Rev. 16
Freescale Semiconductor
2-9
2.6.3.2 Power-On Reset Flow
Asserting the
PORESET
external pin initiates the power-on reset flow.
PORESET
should be asserted externally for at
least 16 input clock cycles after external power to the MSC8101 reaches at least 2/3 V
CC
. As
Table 2-13
shows, the
MSC8101 has five configuration pins, four of which are multiplexed with the SC140 EONCE Event (
EE[0–1]
,
EE[4–5]
) pins and the fifth of which is the
RSTCONF
pin. These pins are sampled at the rising edge of
PORESET
. In
addition to these configuration pins, three (
MODCK[1–3]
) pins are sampled by the MSC8101. The signals on these
pins and the
MODCK_H value in the Hard Reset Configuration Word determine the PLL locking mode, by
defining the ratio between the DSP clock, the bus clocks, and the CPM clock frequencies.
Table 2-13.
External Configuration Signals
Pin
Description
Settings
RSTCONF
Reset Configuration
Input line sampled by the MSC8101 at the rising edge of
PORESET.
0
1
Reset Configuration Master.
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 into
Debug mode.
0
SC140 starts the normal processing
mode after reset.
SC140 enters Debug mode immediately
after reset.
1
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).
Host port enabled.
1
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 2-14.
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
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