TMP320C6720RFP300 datasheet(62/118 Pages) TI

62 / 118 page

TMS320C6727B, TMS320C6726B, TMS320C6722B, TMS320C6720

Floating-Point Digital Signal Processors

SPRS370E – SEPTEMBER 2006 – REVISED JULY 2008

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The UHPI has several device-level configuration registers which affect its behavior. Figure 4-18,

Figure 4-19, and Figure 4-20 show the bit layout of these registers. Table 4-14, Table 4-15, and

Table 4-16 contain a description of the bits in these registers.

Reserved

BYTEAD

FULL

NMUX

PAGEM

ENA

R/W, 0

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Figure 4-18. CFGHPI Register Bit Layout (0x4000 0008)

Table 4-14. CFGHPI Register Bit Field Description (0x4000 0008)

RESET

READ

BIT NO.

NAME

DESCRIPTION

VALUE

WRITE

31:5

Reserved

N/A

Reads are indeterminate. Only 0s should be written to these bits.

BYTEAD

R/W

UHPI Host Address Type

0 = Host Address is a word address

1 = Host Address is a byte address

FULL

R/W

UHPI Multiplexing Mode (when NMUX = 0)

0 = Half-Word (16-bit data) Multiplexed Address and Data Mode

1 = Fullword (32-bit data) Multiplexed Address and Data Mode

NMUX

R/W

UHPI Non-Multiplexed Mode Enable

0 = Multiplexed Address and Data Mode

1 = Non-Multiplexed Address and Data Mode (utilizes optional UHPI_HA[15:0] pins).

Host data bus is 32 bits in Non-Multiplexed mode. Setting this bit prevents the EMIF

from driving data out or 'parking' the shared EM_D[31:16]/UHPI_HA[15:0] pins.

PAGEM

R/W

UHPI Page Mode Enable (Only for Multiplexed Address and Data Mode).

0 = Full 32-bit DSP address specified through host port.

1 = Only lower 16 bits of DSP address are specified through host port. Upper 16 bits

are restricted to the page selected by CFGHPIAMSB and CFGHPIAUMB registers.

ENA

R/W

UHPI Enable

0 = UHPI is disabled

1 = UHPI is enabled. Set this bit to '1' only after configuring the other bits in this

Peripheral and Electrical Specifications

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