TMS320C6421 datasheet(89/227 Pages) TI

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TMS320C6421

Fixed-Point Digital Signal Processor

SPRS346B – JANUARY 2007 – REVISED APRIL 2007

Table 3-18. PINMUX1 Register Bit Descriptions

Bit

Field Name

Description

Pins Controlled

Reserved. For proper device operation, the user should only write "0" to this bit

31:26

RESERVED

–

(default).

Serial Port Sub-Block 1 Pin Select.

Selects the function of the multiplexed pins in the Serial Port Sub-Block 1.

Serial Port Sub-Block 1:

00 = GPIO Mode (default).

AXR0[0]/GP[105]

Pins function as GPIO (GP[110:105]).

ACLKX0/GP[106]

25:24

SPBK1

01 = Reserved.

AFSX0/GP[107]

AHCLKX0/GP[108]

10 = McASP0 Transmit and 1 serializer.

AMUTEIN0/GP[109]

Pins function as McASP0: AXR0[0], ACLKX0, AFSX0, AHCLKX0, AMUTEIN0,

AMUTE0/GP[110]

and AMUTE0.

11 = Reserved.

Serial Port Sub-Block 0 Pin Select.

Selects the function of the multiplexed pins in the Serial Port Sub-Block 0.

00 = GPIO Mode (default).

Serial Port Sub-Block 0:

Pins function as GPIO (GP[104:99]).

ACLKR0/CLKX0/GP[99]

AFSR0/DR0/GP[100]

01 = McBSP0 Mode.

23:22

SPBK0

AHCLKR0/CLKR0/GP[101]

Pins function as McBSP0 CLKX0, FSX0, DX0, CLKR0, FSR0, and DR0.

AXR0[3]/FSR0/GP[102]

AXR0[2]/FSX0/GP[103]

10 = McASP0 Receive and 3 serializers.

AXR0[1]/DX0/GP[104]

Pins function as McASP0 ACLKR0, AFSR0, AHCLKR0, AXR0[3], AXR0[2], and

AXR0[1].

11 = Reserved

Timer1 Block Pin Select.

Selects the function of the multiplexed pins in theTimer1 Block.

00 = GPIO Mode (default).

Pins function as GPIO (GP[56:55]).

Timer1 Block:

21:20

TIM1BK

TINP1L/GP[56]

01 = Timer1 Mode.

TOUT1L/GP[55]

Pins function as Timer1 TINP1L and TOUT1L.

10 = Reserved.

11 = Reserved.

Reserved. For proper device operation, the user should only write "0" to this bit

19:18

RSV

–

(default).

Timer0 Block Pin Select.

Selects the function of the multiplexed pins in the Timer0 Block.

00 = GPIO Mode (default).

Pins function as GPIO (GP[98:97]).

Timer0 Block:

01 = Timer0 Mode.

17:16

TIM0BK

TINP0L/GP[98]

Pins function as Timer0 TINP0L and TOUT0L.

CLKS0/TOUT0L/GP[97]

10 = Reserved

11 = McBSP0 External Clock Source + Timer0 Input Mode.

Pins function as McBSP0 external clock source CLKS0, and Timer0 input

TINP0L.

CLKOUT Block Pin Select.

Selects the function of the multiplexed pins in the CLKOUT Block.

00 = GPIO Mode.

Pin functions as GPIO (GP[84]).

CLKOUT Block:

15:14

CKOBK

01 = CLKOUT Mode (default).

CLKOUT0/PWM2/GP[84]

Pin functions as device clock output CLKOUT0, sourced from PLLC1 OBSCLK.

10 = PWM2 Mode.

Pin functions as PWM2.

11 = Reserved

Reserved. For proper device operation, the user should only write "0" to this bit

RSV

–

(default).

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