參數(shù)資料
型號： TMS320DM355_07
廠商： Texas Instruments, Inc.
英文描述： Digital Media System-on-Chip (DMSoC)
中文描述： 數(shù)字媒體系統(tǒng)芯片（DMSoC）
文件頁數(shù)： 80/158頁
文件大?。?/td> 1319K
代理商： TMS320DM355_07
www.ti.com
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3.11 Default Device Configurations
3.11.1 Device Configuration Pins
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463B–SEPTEMBER 2007–REVISED OCTOBER 2007
Table 3-14. Reset Types (continued)
Type
Module Reset
Initiator
ARM software
Effect
Resets a specific module. Allows the ARM to
independently reset any module. Module reset is
intended as a debug tool not as a tool to use in
production.
After POR, warm reset, and max reset, the chip is in its default configuration. This section highlights the
default configurations associated with PLLs, clocks, ARM boot mode, and AEMIF.
NOTE
Default configuration is the configuration immediately after POR, warm reset, and max
reset and just before the boot process begins. The boot ROM updates the configuration.
See
Section 3.12
for more information on the boot process.
The device configuration pins are described in
Table 3-15
. The device configuration pins are latched at
reset and allow you to configure all of the following options at reset:
ARM Boot Mode
Asynchronous EMIF pin configuration
These pins are described further in the following sections.
NOTE
The device configuration pins are multiplexed with AEMIF pins. After the device
configuration pins are sampled at reset, they automatically change to function as AEMIF
pins. Pin multiplexing is described in
Section 3.8
.
Table 3-15. Device Configuration
Default Setting (by
internal
pull-up/
pull-down)
00
(NAND)
Device
Sampled
Pin
EM_A[13:12]
Configuration Input
BTSEL[1:0]
Function
Device Configuration Affected
If any ROM boot mode is selected, GIO61
is used to indicated boot status.
If NAND boot is selected, CE0 is used for
NAND. Use AECFG[3:0] to configure
AEMIF pins for NAND.
If AEMIF boot is selected, CE0 is used for
AEMIF device (OneNAND, ROM). Use
AECFG[3:0] to configure AEMIF pins for
NAND.
If MMC/SD boot is selected, MMC/SD0 is
used.
Selects the AEMIF pin configuration. Refer
to pin-muxing information in
Section 3.9.1
.
Note that AECFG[3:0] affects both AEMIF
(BTSEL[1:0]=01) and NAND
(BTSEL[1:0]=00) boot modes.
Selects ARM boot mode
00 = Boot from ROM (NAND)
01 = Boot from AEMIF
10 = Boot from ROM
(MMC/SD)
11 = Boot from ROM (UART)
AECFG[3:0]
Selects AEMIF pin
configuration
EM_A[11:8]
1101
(NAND)
Detailed Device Description
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