Texas Instruments TMS320C6727 Device Configuration Registers, Peripheral Pin Multiplexing Options

TMS320C6727, TMS320C6726, TMS320C6722

Floating-Point Digital Signal Processors

www.ti.com

SPRS268E –MAY 2005 –REVISED JANUARY 2007

3 Device Configurations

3.1 Device Configuration Registers

The C672x DSP includes several device-level configuration registers, which are listed in Table 3-1. These registers need to be programmed as part of the device initialization procedure. See Section 3.2.

Table 3-1. Device-Level Configuration Registers

REGISTER NAME	BYTE ADDRESS		DESCRIPTION	DEFINED
CFGPIN0	0x4000	0000	Captures values of eight pins on rising edge of RESET pin.	Table 2-10
CFGPIN1	0x4000	0004	Captures values of eight pins on rising edge of RESET pin.	Table 2-11
CFGHPI	0x4000	0008	Controls enable of UHPI and selection of its operating mode.	Table 4-12
CFGHPIAMSB	0x4000	000C	Controls upper byte of UHPI address into C672x address space in	Table 4-13
			Non-Multiplexed Mode or if explicitly enabled for security purposes.
CFGHPIAUMB	0x4000	0010	Controls upper middle byte of UHPI address into C672x address space	Table 4-14
			in Non-Multiplexed Mode or if explicitly enabled for security purposes.
CFGRTI	0x4000	0014	Selects the sources for the RTI Input Captures from among the six	Table 4-37
			McASP DMA events.
CFGMCASP0	0x4000	0018	Selects the peripheral pin to be used as AMUTEIN0.	Table 4-19
CFGMCASP1	0x4000	001C	Selects the peripheral pin to be used as AMUTEIN1.	Table 4-20
CFGMCASP2(1)	0x4000	0020	Selects the peripheral pin to be used as AMUTEIN2.	Table 4-21
CFGBRIDGE	0x4000	0024	Controls reset of the bridge BR2 in Figure 2-4. This bridge must be reset	Table 2-7
			explicitly after any change to the PLL controller affecting SYSCLK1 and
			SYSCLK2 and before the dMAX or UHPI accesses the CPU Slave Port
			(CSP).

(1)CFGMCASP2 is reserved on the C6722.

3.2 Peripheral Pin Multiplexing Options

This section describes the options for configuring peripherals which share pins on the C672x DSP. Table 3-2lists the options for configuring the SPI0, I2C0, and I2C1 peripheral pins.

Table 3-2. Options for Configuring SPI0, I2C0, and I2C1

			CONFIGURATION
		OPTION 1	OPTION 2	OPTION 3
PERIPHERAL	SPI0	3-, 4,- or 5-pin mode	3-pin mode	disabled
	I2C0	disabled	disabled	enabled
	I2C1	disabled	enabled	enabled
PINS	SPI0_SOMI/I2C0_SDA	SPI0_SOMI	SPI0_SOMI	I2C0_SDA
	SPI0_SIMO	SPI0_SIMO	SPI0_SIMO	GPIO through SPI0_SIMO pin control
	SPI0_CLK/I2C0_SCL	SPI0_CLK	SPI0_CLK	I2C0_SCL
	SPI0_SCS/I2C1_SCL	SPI0_SCS	I2C1_SCL	I2C1_SCL
	SPI0_ENA/I2C1_SDA	SPI0_ENA	I2C1_SDA	I2C1_SDA

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