參數(shù)資料
型號(hào)： TMS320F241PGS
廠商： TEXAS INSTRUMENTS INC
元件分類： 數(shù)字信號(hào)處理
英文描述： 0-BIT, 5 MHz, OTHER DSP, PQFP64
封裝： PLASTIC, QFP-64
文件頁數(shù)： 2/122頁
文件大?。?/td> 1465K
代理商： TMS320F241PGS
TMS320F243, TMS320F241
DSP CONTROLLERS
SPRS064D DECEMBER 1997 REVISED FEBRUARY 2006
10
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
Terminal Functions - F243 PGE Package (Continued)
NAME
144
LQFP
TYPE
RESET
STATE
DESCRIPTION
NAME
NO.
TYPE
STATE
DESCRIPTION
INTERRUPT, EXTERNAL ACCESS, AND MISCELLANEOUS SIGNALS (CONTINUED)
IS
105
I/O, data, and program space strobe select signals. IS, DS, and PS are always high
unless low-level asserted for access to the relevant external memory space or I/O.
IS
DS
PS
105
110
107
O/Z
1
I/O, data, and program space strobe select signals. IS, DS, and PS are always high
unless low-level asserted for access to the relevant external memory space or I/O.
They are placed in the high-impedance state during reset, power down, and when
DS
PS
110
107
O/Z
1
They are placed in the high-impedance state during reset, power down, and when
EMU1/OFF is active low.
WE
112
O/Z
1
Write enable strobe. The falling edge of WE indicates that the device is driving the
external data bus (D15 D0). WE is active on all external program, data, and I/O
writes. WE goes in the high-impedance state when EMU1/OFF is active low.
RD
118
O/Z
1
Read enable strobe. Read-select indicates an active, external read cycle. RD is
active on all external program, data, and I / O reads. RD goes into the
high-impedance state when EMU1/OFF is active low.
R/W
114
O/Z
1
Read/write signal. R/W indicates transfer direction during communication to an
external device. It is normally in read mode (high), unless low level is asserted for
performing a write operation. It is placed in the high-impedance state when
EMU1/OFF is active low and during power down.
STRB
122
O/Z
1
External memory access strobe. STRB is always high unless asserted low to
indicate an external bus cycle. STRB is active for all off-chip accesses. It is placed
in the high-impedance state during power down, and when EMU1/OFF is active
low.
BR
120
O/Z
1
Bus request, global memory strobe. BR is asserted during access of
external global data memory space. BR can be used to extend the data memory
address space by up to 32K words. BR goes in the high-impedance state during
reset, power down, and when EMU1/OFF is active low.
VIS_CLK
31
O
0
Visibility clock. Same as CLKOUT, but timing is aligned for external buses in
visibility mode.
ENA_144
18
I
Active high to enable external interface signals. If pulled low, the F243 behaves like
an F241—i.e., it has no external memory and generates an illegal address if any
of the three external spaces are accessed (IS, DS, PS asserted). This pin has an
internal pulldown.
(
↓)
VIS_OE
126
O
0
This pin is active (low) whenever the external databus is driving as an output during
visibility mode. Can be used by external decode logic to prevent data bus
contention while running in visibility mode.
XF/IOPC0
49
I/O
O 1
External flag
output
(latched
software-programmable
signal).
XF
is
a
general-purpose output pin. It is set/reset by the SETC XF/CLRC XF instruction.
This pin is configured as an external flag output by all device resets. It can be used
as a GPIO, if not used as XF.
BIO/IOPC1
55
I/O
I
Branch control input. BIO is polled by the BCND pma,BIO instruction. If BIO is low,
a branch is executed. If BIO is not used, it should be pulled high. This pin is
configured as a branch control input by all device resets. It can be used as a GPIO,
if not used as a branch control input.
I = input, O = output, Z = high impedance
The reset state indicates the state of the pin at reset. If the pin is an input, indicated by an I, its state is determined by user design. If the pin is
an output, its level at reset is indicated.
§ At reset, the device comes up with AVIS mode enabled. The data bus is in output mode while AVIS is enabled.
NOTE: Bold, italicized pin names indicate pin function after reset.
LEGEND:
↑ Internal pullup
↓ Internal pulldown
(Typical active pullup/pulldown value is 150
A.)
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