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5.15.2

McBSP General-Purpose I/O Timings

CLKOUT

MGPIO

Input Mode

(see Note A)

MGPIO

Output Mode

(see Note B)

M22

M23

M21

MGPIOx refers to CLKRx, FSRx, DRx, CLKXx, or FSXx when configured as a general-purpose input.

MGPIOx refers to CLKRx, FSRx, CLKXx, FSXx, or DXx when configured as a general-purpose output.

TMS320VC5502

Fixed-Point Digital Signal Processor

SPRS166H – APRIL 2001 – REVISED NOVEMBER 2004

Table 5-33 and Table 5-34 assume testing over recommended operating conditions (see Figure 5-34).

Table 5-33. McBSP General-Purpose I/O Timing Requirements

VC5502-200

VC5502-300

NO.

UNIT

MIN

MAX

M22

tsu(MGPIO-COH)

Setup time, MGPIOx input mode before CLKOUT high(1)(2)

M23

th(COH-MGPIO)

Hold time, MGPIOx input mode after CLKOUT high(1)(2)

(1)

MGPIOx refers to CLKRx, FSRx, DRx, CLKXx, or FSXx when configured as a general-purpose input.

(2)

In this case, CLKOUT reflects SYSCLK2. The CLKOUT Selection Register (CLKOUTSR) can be programmed to select SYSCLK2 as

CLKOUT.

Table 5-34. McBSP General-Purpose I/O Switching Characteristics

VC5502-200

VC5502-300

NO.

PARAMETER

UNIT

MIN

MAX

M21

td(COH-MGPIO)

Delay time, CLKOUT high to MGPIOx output mode(1)(2)

(1)

In this case, CLKOUT reflects SYSCLK2. The CLKOUT Selection Register (CLKOUTSR) can be programmed to select SYSCLK2 as

CLKOUT.

(2)

MGPIOx refers to CLKRx, FSRx, CLKXx, FSXx, or DXx when configured as a general-purpose output.

Figure 5-34. McBSP General-Purpose I/O Timings

Specifications

161

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