TMS320LC2402 datasheet(13/106 Pages) TI

13 / 106 page

TMS320LF2407, TMS320LF2406, TMS320LF2402

TMS320LC2406, TMS320LC2404, TMS320LC2402

DSP CONTROLLERS

SPRS094C – APRIL 1999 – REVISED OCTOBER 1999

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

pin functions (continued)

Table 2. ’LF240x and ’LC240x Pin List and Package Options†‡ (Continued)

PIN NAME

’LF2407

’2406

’LC2404

’2402

DESCRIPTION

ADDRESS, DATA, AND MEMORY CONTROL SIGNALS (CONTINUED)

MP/MC

118

Microprocessor/Microcomputer mode select. If this pin is low

during reset, the device is put in microcomputer mode and

program execution begins at 0000h of internal program memory

(flash EEPROM). A high value during reset puts the device in

microprocessor mode and program execution begins at 0000h of

external program memory. This line sets the MP/MC bit (bit 2 in

the SCSR2 register).

(

↓)

ENA_144

122

Active high to enable external interface signals. If pulled low, the

’2407 behaves like the ’2406/’2404—i.e., it has no external

memory and generates an illegal address if any of the three

external spaces are accessed (IS and DS asserted). This pin

has an internal pulldown.

(

↓)

VIS_OE

Visibility output enable (active when data bus is output). 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.

Bit 0 of the 16-bit address bus

Bit 1 of the 16-bit address bus

Bit 2 of the 16-bit address bus

Bit 3 of the 16-bit address bus

Bit 4 of the 16-bit address bus

Bit 5 of the 16-bit address bus

Bit 6 of the 16-bit address bus

Bit 7 of the 16-bit address bus

Bit 8 of the 16-bit address bus

Bit 9 of the 16-bit address bus

A10

Bit 10 of the 16-bit address bus

A11

Bit 11 of the 16-bit address bus

A12

Bit 12 of the 16-bit address bus

A13

Bit 13 of the 16-bit address bus

A14

Bit 14 of the 16-bit address bus

A15

Bit 15 of the 16-bit address bus

127

Bit 0 of 16-bit data bus

(

↑)

130

Bit 1 of 16-bit data bus

(

↑)

132

Bit 2 of 16-bit data bus

(

↑)

134

Bit 3 of 16-bit data bus

(

↑)

136

Bit 4 of 16-bit data bus

(

↑)

138

Bit 5 of 16-bit data bus

(

↑)

143

Bit 6 of 16-bit data bus

(

↑)

Bit 7 of 16-bit data bus

(

↑)

Bit 8 of 16-bit data bus

(

↑)

† Bold, italicized pin names indicate pin function after reset.

‡ GPIO – General-purpose input/output pin. All GPIOs come up as input after reset.

LEGEND:

↑ – Internal pullup

↓ – Internal pulldown

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