ꢀ ꢁ ꢂ ꢃ ꢄꢅ ꢆ ꢇ ꢈꢉ ꢈꢀꢊ ꢀꢁ ꢂꢃ ꢄ ꢅ ꢆꢇ ꢈ ꢉ ꢋꢀꢊ ꢀꢁ ꢂꢃ ꢄ ꢅ ꢆꢇ ꢈ ꢉ ꢇ ꢀ
ꢌ ꢍ ꢎꢏ ꢐꢑꢒ ꢓꢍ ꢔ ꢀ ꢐꢍ ꢕ ꢍ ꢀꢖꢗ ꢂ ꢍ ꢕꢔ ꢖꢗ ꢒ ꢘꢓ ꢆꢏ ꢂꢂꢓ ꢘꢂ
SPRS226H − NOVEMBER 2003 − REVISED AUGUST 2005
Terminal Functions (Continued)
SIGNAL
NAME
IPD/
IPU
†
TYPE
DESCRIPTION
‡
NO.
ꢁ
||
EMIFB (16-BIT) − ADDRESS
EMIFB external address (half-word address) (O/Z)
BEA20
E16
D18
C18
B18
A18
D17
C17
B17
A17
D16
C16
B16
A16
D15
C15
B15
A15
D14
C14
A14
IPU
IPU
•
Also controls initialization of DSP modes at reset (I) via pullup/pulldown resistors
− Device Endian mode
BEA20:
0
1
–
−
Big Endian
Little Endian (default mode)
BEA19
BEA18
BEA17
BEA16
BEA15
BEA14
BEA13
BEA12
BEA11
BEA10
BEA9
− Boot mode
BEA[19:18]: 00 – No boot
01 − HPI boot
10 − EMIFB 8-bit ROM boot with default timings (default mode)
11 − Reserved
− EMIF clock select
BEA[17:16]: Clock mode select for EMIFA (AECLKIN_SEL[1:0])
00 – AECLKIN (default mode)
01 − CPU/4 Clock Rate
10 − CPU/6 Clock Rate
11 − Reserved
BEA[15:14]: Clock mode select for EMIFB (BECLKIN_SEL[1:0])
00 – BECLKIN (default mode)
01 − CPU/4 Clock Rate
10 − CPU/6 Clock Rate
11 − Reserved
− PCI EEPROM Auto-Initialization (EEAI) [C6415T and C6416T devices only]
BEA13:
PCI auto-initialization via external EEPROM
I/O/Z
IPD
If the PCI peripheral is disabled (PCI_EN pin = 0), this pin must not be pulled up.
0
1
−
−
PCI auto-initialization through EEPROM is disabled (default).
PCI auto-initialization through EEPROM is enabled.
BEA8
− UTOPIA Enable (UTOPIA_EN) [C6415T and C6416T devices only]
BEA11: UTOPIA peripheral enable (functional)
BEA7
0
1
−
−
UTOPIA disabled (McBSP1 enabled) [default]
UTOPIA enabled (McBSP1 disabled)
BEA6
The C6414T device does not support the PCI and UTOPIA peripherals; for proper device
operation, do not oppose the internal pulldowns (IPDs) on the BEA13 and BEA11 pins.
BEA5
Also for proper C6414T device operation, do not oppose the IPDs on the BEA7, BEA8,
and BEA9 pins.
BEA4
For proper C6415T device operation, the BEA7 pin must be externally pulled up with a
1-kΩ resistor.
BEA3
BEA2
For proper C6416T device operation, the BEA8 and BEA9 pins must be externally
pulled up with a 1-kΩ resistor.
BEA1
For more details, see the Device Configurations section of this data sheet.
†
‡
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground
IPD = Internal pulldown, IPU = Internal pullup. (These IPD/IPU signal pins feature a 30-kΩ IPD or IPU resistor. To pull up a signal to the opposite
supply rail, a 1-kΩ resistor should be used.)
These C64x devices have two EMIFs (64-bit EMIFA and 16-bit EMIFB). The prefix “A” in front of a signal name indicates it is an EMIFA signal
whereas a prefix “B” in front of a signal name indicates it is an EMIFB signal. Throughout the rest of this document, in generic EMIF areas of
discussion, the prefix “A” or “B” may be omitted from the signal name.
||
ꢁ To maintain signal integrity for the EMIF signals, serial termination resistors should be inserted into all EMIF output signal lines.
50
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
TI [ TEXAS INSTRUMENTS ]
