- Texas Instruments Floating Point Digital Signal Processor Specification Sheet
SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
29
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
Terminal Functions (Continued)
SIGNAL
PIN
NO.
TYPE
†
IPD/
‡
DESCRIPTION
SIGNAL
NAME
GDP/
ZDP
TYPE
†
IPD/
IPU
‡
DESCRIPTION
EMIF − DATA (CONTINUED)
¶
ED18 Y3
ED17 W4
ED16 V4
ED15 T19
ED14 T20
ED13 T18
ED12 R20
ED11 R19
ED10 P20
ED9 P18
I/O/Z IPU External data
ED8 N20
I/O/Z
IPU
External data
ED7 N19
ED6 N18
ED5 M20
ED4 M19
ED3 L19
ED2 L18
ED1 K19
ED0 K18
TIMER 1
TOUT1 F1 O IPD Timer 1 or general-purpose output
TINP1 F2 I IPD Timer 1 or general-purpose input
TIMER 0
TOUT0 G1 O IPD Timer 0 or general-purpose output
TINP0 G2 I IPD Timer 0 or general-purpose input
MULTICHANNEL BUFFERED SERIAL PORT 1 (McBSP1)
CLKS1 E1 I IPD
External clock source (as opposed to internal)
On the device, this pin does not have an internal pulldown (IPD). For proper device opera-
tion, the CLKS1 pin should either be driven externally at all times or be pulled up with a 10-kΩ
resistor to a valid logic level. Because it is common for some ICs to 3-state their outputs at
times, a 10-kΩ pullup resistor may be desirable even when an external device is driving the
pin.
CLKR1 M1 I/O/Z IPD Receive clock
CLKX1 L3 I/O/Z IPD Transmit clock
†
I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal (PLL Filter)
‡
IPD = Internal pulldown, IPU = Internal pullup. [To oppose the supply rail on these IPD/IPU signal pins, use external pullup or pulldown resistors
no greater than 4.4 kΩ and 2.0 kΩ, respectively.]
¶
To maintain signal integrity for the EMIF signals, serial termination resistors should be inserted into all EMIF output signal lines.