Texas Instruments TMS320C6722 Uživatelský manuál stáhnout pdf (Strana 21)

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2.9.2 Terminal Functions

TMS320C6727, TMS320C6726, TMS320C6722

Floating-Point Digital Signal Processors

SPRS268E – MAY 2005 – REVISED JANUARY 2007

Table 2-12 , the Terminal Functions table, identifies the external signal names, the associated pin/ball

numbers along with the mechanical package designator, the pin type (I, O, IO, OZ, or PWR), whether the

pin/ball has any internal pullup/pulldown resistors, whether the pin/ball is configurable as an IO in GPIO

mode, and a functional pin description.

Table 2-12. Terminal Functions

GDH/

SIGNAL NAME RFP TYPE

(1)

PULL

(2)

GPIO

(3)

DESCRIPTION

ZDH

External Memory Interface (EMIF) Address and Control

EM_A[0] 91 J16 O - N

EM_A[1] 89 J15 O - N

EM_A[2] 88 K15 O - N

EM_A[3] 86 L16 O - N

EM_A[4] 84 L15 O - N

EM_A[5] 83 M16 O - N

EM_A[6] 80 M15 O - N EMIF Address Bus

EM_A[7] 79 N16 O - N

EM_A[8] 76 N15 O - N

EM_A[9] 75 P16 O - N

EM_A[10] 93 H15 O - N

EM_A[11] 74 P15 O - N

EM_A[12] - P12 O IPD N

EM_BA[0] 96 G15 O - N

SDRAM Bank Address and Asynchronous Memory

Low-Order Address

EM_BA[1] 94 H16 O - N

EM_CS[0] 97 F15 O - N SDRAM Chip Select

EM_CS[2] 100 E15 O - N Asynchronous Memory Chip Select

EM_CAS 37 R3 O - N SDRAM Column Address Strobe

EM_RAS 98 F16 O - N SDRAM Row Address Strobe

EM_WE 38 T3 O - N SDRAM/Asynchronous Write Enable

EM_CKE 71 T14 O - N SDRAM Clock Enable

EM_CLK 70 R14 O - N EMIF Output Clock

EM_ WE_DQM[0] 39 R4 O - N Write Enable or Byte Enable for EM_D[7:0]

EM_ WE_DQM[1] 67 T13 O - N Write Enable or Byte Enable for EM_D[15:8]

EM_ WE_DQM[2] - P13 O IPU N Write Enable or Byte Enable for EM_D[23:16]

EM_ WE_DQM[3] - R15 O IPU N Write Enable or Byte Enable for EM_D[31:24]

EM_OE 104 D15 O - N SDRAM/Asynchronous Output Enable

EM_R W 102 E16 O - N Asynchronous Memory Read/not Write

Asynchronous Wait Input ( Programmable Polarity) or

EM_WAIT - D14 I IPU N

Interrupt ( NAND)

(1) TYPE column refers to pin direction in functional mode. If a pin has more than one function with different directions, the functions are

separated with a slash (/).

(2) PULL column:

IPD = Internal Pulldown resistor

IPU = Internal Pullup resistor

(3) If the GPIO column is 'Y', then in GPIO mode, the pin is configurable as an IO unless otherwise marked.

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