SPRS293A − OCTOBER 2005 − REVISED NOVEMBER 2005
28
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)#
ED9
P18
I/O/Z
IPU
External data
ED8
N20
I/O/Z
IPU
External data
ED7
N19
ED6
N18
ED5
M20
ED4
M19
I/O/Z
IPU
External data
ED3
L19
I/O/Z
IPU
External data
ED2
L18
ED1
K19
ED0
K18
TIMER1
TOUT1
F1
O
IPD
Timer 1 or general-purpose output
TINP1
F2
I
IPD
Timer 1 or general-purpose input
TIMER0
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 this 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-k
Ω
resistor to a valid logic level. Because it is common for some ICs to 3-state their out-
puts at times, a 10-k
Ω
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
DR1
M2
I
IPU
Receive data
On this device, this pin does not have an internal pullup (IPU). For proper device operation,
the DR1 pin should either be driven externally at all times or be pulled up with a 10-k
Ω
resis-
tor to a valid logic level. Because it is common for some ICs to 3-state their outputs at times,
a 10-k
Ω
pullup resistor may be desirable even when an external device is driving the pin.
DX1
L2
O/Z
IPU
Transmit data
FSR1
M3
I/O/Z
IPD
Receive frame sync
FSX1
L1
I/O/Z
IPD
Transmit frame sync
† 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 k
Ω
and 2.0 k
Ω
, respectively.]
# To maintain signal integrity for the EMIF signals, serial termination resistors should be inserted into all EMIF output signal lines.