System Configuration and Booting
©
PHYTEC Messtechnik GmbH 2010 L-750e_1
35
phyCARD
config pins
X_BOOT[1:0]
Boot Mode
Selection
BMOD[1:0]
Boot Mode/
Device
Boot Details
00 01
Startup
mode
Mode for debug and/or
development purpose
using JTAG-capable
development tools.
01 00
Internal
Boot
10 11
Serial
boot
loader r
Load and execute code,
via serial devices; e.g.
the ATK Toolkit from
Freescale
11 10
External
(direct)
Boot
Boot from NAND
Flash populated on the
phyCARD-M
Table 8:
Boot Modes of i.MX35 module
Note:
To conform to the phyCARD specification, BMOD0 is the inverse of
the input level of X_BOOT0.
Because of pull-up resistors located on the phyCARD-M the default
boot mode is External Boot which allows to boot from NAND Flash,
if the boot pins X_BOOT[1:0] are left open. In other words, to boot
from NAND Flash no further settings at X_BOOT[1:0] are necessary.
To enter other boot modes a low level must be applied to X_BOOT[0]
(X2A50) and/or X_BOOT[1] (X2B50) according to
Table 8
.
Additional boot configuration settings are obtained either from programmable
eFuses or by contacts sampled at POR. On the phyCARD-M the boot
configuration is set up by 10k pull-up/ pull-down resistors which are
tied to the corresponding CSI-Signals.
Table 9
lists the additional
configuration settings and the default values.
Содержание phyCARD-M
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