SPRS293A − OCTOBER 2005 − REVISED NOVEMBER 2005
24
POST OFFICE BOX 1443
•
HOUSTON, TEXAS 77251−1443
Terminal Functions
SIGNAL
PIN
NO.
TYPE†
IPD/
‡
DESCRIPTION
SIGNAL
NAME
GDP/
ZDP
TYPE†
IPD/
IPU‡
DESCRIPTION
CLOCK/PLL
CLKIN
A3
I
IPU
Clock Input
CLKOUT2
Y12
O/Z
IPD
The CLKOUT2 pin is multiplexed with the GP[2] pin. Clock output at half of device speed (O/Z)
[default] (SYSCLK2 internal signal from the clock generator) or this pin can be programmed as
GP[2] (I/O/Z).
When the CLKOUT2 pin is enabled, the CLK2EN bit in the EMIF global control
register (GBLCTL) controls the CLKOUT2 pin (All devices).
CLK2EN = 0:
CLKOUT2 is disabled
CLK2EN = 1:
CLKOUT2 enabled to clock [default]
CLKOUT3
D10
O
IPD
Clock output programmable by OSCDIV1 register in the PLL controller
CLKMODE0
C4
I
IPU
Clock generator input clock source select
0
−
Reserved. Do not use.
1
−
CLKIN square wave [default]
For proper device operation, this pin must be either left unconnected or
externally pulled up with a 1-k
Ω
resistor.
PLLHV
C5
A
Analog power (3.3 V) for PLL
JTAG EMULATION
TMS
B7
I
IPU
JTAG test-port mode select
TDO
A8
O/Z
IPU
JTAG test-port data out
TDI
A7
I
IPU
JTAG test-port data in
TCK
A6
I
IPU
JTAG test-port clock
TRST§
B6
I
IPD
JTAG test-port reset. For IEEE 1149.1 JTAG compatibility, see the IEEE 1149.1
JTAG Compatibility Statement section of this data sheet.
EMU5
B12
I/O/Z
IPU
Emulation pin 5. Reserved for future use, leave unconnected.
EMU4
C11
I/O/Z
IPU
Emulation pin 4. Reserved for future use, leave unconnected.
EMU3
B10
I/O/Z
IPU
Emulation pin 3. Reserved for future use, leave unconnected.
EMU2
D3
I/O/Z
IPU
Emulation pin 2. Reserved for future use, leave unconnected.
† 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 ensure a proper logic level during reset when these pins are both routed out and 3-stated or not driven, it is recommended that an external
10-k
Ω
pullup/pulldown resistor be included to sustain the IPU/IPD, respectively.