SM320DM642-HIREL Datasheet, PDF (65/170 Pages) Texas Instruments – SM320DM642-HiRel Video/Imaging Fixed Point Digital Signal Processor

SM320DM642-HiRel
www.ti.com
SGUS063A – JUNE 2009 – REVISED OCTOBER 2010
Table 3-8. DM642 Device Multiplexed Pin Configurations⁽¹⁾ (continued)
MULTIPLEXED PINS
NAME
NO.
DEFAULT
FUNCTION
DEFAULT
SETTING
DESCRIPTION
By default, HPI is enabled upon reset (PCI is disabled).
HD[23,15:0]/AD[23,15:0]
HD31/AD31/MRCLK
HD30/AD30/MCRS
HD29/AD29/MRXER
HD28/AD28/MRXDV
HD27/AD27/MRXD3
HD26/AD26/MRXD2
HD25/AD25/MRXD1
HD24/AD24/MRXD0
HD22/AD22/MTCLK
HD21/AD21/MCOL
HD20/AD20/MTXEN
HD19/AD19/MTXD3
HD18/AD18/MTXD2
HD17/AD17/MTXD1
HD16/AD16/MTXD0
(2) _{HD[23, 15:0] PCI_EN = 0 (disabled)}(1) _{To enable the PCI peripheral, an external pullup resistor}
(1 kΩ) must be provided on the PCI_EN pin (setting
PCI_EN = 1 at reset).
G1 HD31
H3 HD30
G2 HD29
J4 HD28
H2 HD27
J3 HD26
J1 HD25
K4 HD24
L4 HD22
K2 HD21
L3 HD20
By default, HPI is enabled upon reset (PCI is disabled).
PCI_EN = 0 (disabled)⁽¹⁾
MAC_EN = 0
(disabled)⁽¹⁾
To enable the PCI peripheral, an external pullup resistor
(1 kΩ) must be provided on the PCI_EN pin (setting
PCI_EN = 1 at reset).
To enable the EMAC peripheral, an external pullup resistor
(1 kΩ) must be provided on the MAC_EN pin (setting
MAC_EN = 1 at reset).
L2 HD19
M4 HD18
M2 HD17
M3 HD16
3.6 Debugging Considerations
It is recommended that external connections be provided to device configuration pins, including
TOUT1/LENDIAN, AEA[22:19], GP0[3]/PCIEEAI, VDAC/GP0[8]/PCI66, HD5/AD5, PCI_EN, and
TOUT0/MAC_EN. Although internal pullup/pulldown resistors exist on these pins, providing external
connectivity adds convenience to the user in debugging and flexibility in switching operating modes.
Internal pullup/pulldown resistors also exist on the non-configuration pins on the AEA bus (AEA[18:0]). Do
not oppose the internal pullup/pulldown resistors on these non-configuration pins with external
pullup/pulldown resistors. If an external controller provides signals to these non-configuration pins, these
signals must be driven to the default state of the pins at reset, or not be driven at all.
For the internal pullup/pulldown resistors for all device pins, see the terminal functions table.
3.7 Configuration Examples
Figure 3-6 through Figure 3-8 illustrate examples of peripheral selections that are configurable on the
DM642 device.
Copyright © 2009–2010, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): SM320DM642-HiRel
Device Configurations
65