Reset Configuration Signals - Freescale Semiconductor QorIQ LS1043A Reference Manual

Step
1 PORESET_B: General information
2 PORESET_B: During negation
3 PORESET_B: After negation
4 POR configuration input
5 RCW configuration time
The LS1043ARDB has default DIP switch settings that can
manually be repositioned based on the user-selected
configuration levels.

3.4.1 Reset configuration signals

The table below describes the reset configuration input signals on the LS1043ARDB.
Configuration signal
CFG_RCW_SRC0 IFC_CLE
CFG_RCW_SRC1 IFC_AD8
CFG_RCW_SRC2 IFC_AD9
CFG_RCW_SRC3 IFC_AD10
CFG_RCW_SRC4 IFC_AD11
CFG_RCW_SRC5 IFC_AD12
QorIQ LS1043A Reference Design Board Reference Manual, Rev. 0, 08/2015
Freescale Semiconductor, Inc.
Table 3-2. PORESET_B sequence
Sequence stage
Table 3-3. Reset configuration input signals
Pin location
SW4[1]
SW4[2]
SW4[3]
SW4[4]
SW4[5]
SW4[6]
Table continues on the next page...
Chapter 3 Power Supplies and CPLD Controller
1. PORESET_B is asserted.
2. CPLD drives CFG_RCW_SRC[0..8] and all reset configuration
input signals to the LS1043A processor (see
configuration signals).
3. CPLD deasserts PORESET_B and the LS1043A processor
samples the configuration pins.
4. The LS1043A processor asserts HRESET_B and loads RCW.
5. After RCW is loaded, the LS1043A processor deasserts
HRESET_B.
1. The LS1043A processor samples the configuration signals,
and determines the interface to load RCW.
2. The LS1043A processor asserts HRESET_B throughout
PORESET_B.
The LS1043A processor begins the configuration process and starts
loading RCW.
The reset configuration inputs are sampled to determine:
• Configuration source: CFG_RCW_SRC[0:8]
• CFG_ENG_USE[0:2]
• CFG_SOC_USE
• CFG_GPINPUT[0:3]
• DRAM type (DDR4 or DDR3L): CFG_DRAM_TYPE
• System version register: CFG_SVR[0:1]
• CFG_IFC_TE
Time required varies according to the RCW source and CLKIN
frequency.
NOTE
DIP switch preset
Specifies RCW fetch location
Specifies RCW fetch location
Specifies RCW fetch location
Specifies RCW fetch location
Specifies RCW fetch location
Specifies RCW fetch location
Description
Reset
Description
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