Firmware
Power-Up Sequence
PPC/PMC-8260/DS1
4 - 7
Check for ROM image?
The firmware can be configured to check for a ROM
image in the boot flash device or to start the primary
booter. This is done by setting the ROMSKIP bit in the
PCR register (see Table 12 “PCR Register Settings” page
4-13).
ROM image present?
The firmware checks whether a ROM image is present at
address FE040108
16
.
Preset SYPCR register (option-
ally)
At power up, the watchdog and the bus monitor are
enabled. You can configure your ROM image to make the
firmware change the System Protection Control register
(SYPCR) settings and to disable the watchdog and the
bus monitor. This is done by programming the ROM
image accordingly. For further information, see section
“SYPCR Register” on page 4-9.
Set power-up status (PSR) to
ROMEX
Before the ROM image is executed, the value 3 is written
into the PSR. This information can be used to poll the
power-up status.
Set power-up status (PSR) to
RDY
Before the primary booter is started, the value 2 is written
into the PSR. This status bit can be used to poll the
power-up status.
Table 10:
Steps Performed During Power-Up
Step
Description
Summary of Contents for PPC/PMC-8260/DS1
Page 1: ...PPC PMC 8260 DS1 Reference Guide P N 6806800B10A July 2006 ...
Page 8: ...viii PPC PMC 8260 DS1 ...
Page 22: ...xxii PPC PMC 8260 DS1 ...
Page 26: ...xxvi PPC PMC 8260 DS1 ...
Page 30: ...xxx PPC PMC 8260 DS1 ...
Page 31: ...1 Introduction ...
Page 32: ......
Page 39: ...2 Installation ...
Page 40: ......
Page 53: ...3 Indicators and Connectors ...
Page 54: ......
Page 64: ...On Board Connectors Indicators and Connectors 3 12 PPC PMC 8260 DS1 ...
Page 65: ...4 Firmware ...
Page 66: ......
Page 104: ...Code Examples Firmware 4 40 PPC PMC 8260 DS1 ...
Page 105: ...5 Memory Map and Devices ...
Page 106: ......
Page 132: ...Resetting the Devices Memory Map and Devices 5 28 PPC PMC 8260 DS1 ...
Page 133: ...6 TDM Channel Configuration ...
Page 134: ......
Page 145: ...A Troubleshooting ...
Page 146: ......
Page 148: ...A 4 PPC PMC 8260 DS1 ...
Page 150: ...I 2 PPC PMC 8260 DS1 ...