MSC8126 Freescale Semiconductor / Motorola, MSC8126 Datasheet - Page 21

• Manufacturer Part Number: MSC8126
• Description: Quad Digital Signal Processor
• Manufacturer: Freescale Semiconductor / Motorola

2.5.4.3
Table 12 and Figure 9 describe the reset timing for a reset configuration write through the direct slave interface (DSI) or
through the system bus.
Freescale Semiconductor
Note:
No.
1
2
3
5
6
7
8
Required external PORESET duration minimum
•
•
•
Delay from deassertion of external PORESET to deassertion of internal
PORESET
•
Delay from de-assertion of internal PORESET to SPLL lock
•
•
•
Delay from SPLL to HRESET deassertion
•
Delay from SPLL lock to SRESET deassertion
•
Setup time from assertion of
CHIP_ID[0–3], BM[0–2], SWTE, and MODCK[1–2] before deassertion of
PORESET
Hold time from deassertion of PORESET to deassertion of
CNFGS, DSISYNC, DSI64, CHIP_ID[0–3], BM[0–2], SWTE, and
MODCK[1–2]
Timings are not tested, but are guaranteed by design.
Output (I/O)
CLKIN = 20 MHz
CLKIN = 133 MHz (400 MHz core)
CLKIN = 166 MHz (500 MHz core)
CLKIN = 20 MHz to 166 MHz
CLKIN = 20 MHz (RDF = 1)
CLKIN = 133 MHz (RDF = 2) (400 MHz core)
CLKIN = 166 MHz (RDF = 2) (500 MHz core)
REFCLK = 40 MHz to 166 MHz
REFCLK = 40 MHz to 166 MHz
Output (I/O)
PORESET
HRESET
SRESET
Input
PORESET
Internal
Table 12. Timing for a Reset Configuration Write through the DSI or System Bus
Reset Timing Tables
Figure 9. Timing Diagram for a Reset Configuration Write
MSC8126 Quad Digital Signal Processor Data Sheet, Rev. 13
1
Characteristics
RSTCONF
Reset configuration write
sequence during this
period.
RSTCONF, CNFGS, DSISYNC, DSI64
CHIP_ID[0–3], BM[0–2], SWTE, MODCK[1–2]
pins are sampled
Reset Configuration
, CNFGS, DSISYNC, DSI64,
Host programs
1 + 2
Word
2
RSTCONF
SPLL
locking period
MODCK[3–5]
,
3
clock-division factor)
6400/(CLKIN/RDF)
(PLL reference
Expression
512/REFCLK
515/REFCLK
1024/CLKIN
16/CLKIN
SPLL is locked
(no external indication)
Electrical Characteristics
5
6
Min
6.17
3.08
3.10
800
120
320
96
96
77
3
5
12.88
Max
51.2
12.8
800
320
—
—
96
77
—
—
Unit
ns
ns
ns
µs
µs
µs
µs
µs
µs
ns
ns
21