TMS320DM365_17 Datasheet, PDF (195/210 Pages) Texas Instruments – Digital Media System-on-Chip (DMSoC)

TMS320DM365
www.ti.com
SPRS457E – MARCH 2009 – REVISED JUNE 2011
6.23 Host-Port Interface (HPI) Peripheral
Note: HPI is pin multiplexed with Asynchronous EMIF at the output pin. HPI is available only when boot
mode selected is HPI boot mode. In this configuration, the device will always act as a slave.
6.23.1 HPI Device-Specific Information
The device includes a user-configurable 16-bit Host-port interface (HPI16).
• Multiplexed (address/data) operation
• Configurable single full-word cycle and dual half-word cycle access modes
• Bursting available utilizing 8-word read and write FIFOs
• HPIA register supports auto-incrementing
• HPID register/FIFOs providing data-path between external host interface and system bus
• Multiple strobes and control signals to allow flexible host connection
• Software control of data prefetching to the HPID/FIFOs
• DMSoC-to-Host interrupt output signal controlled by HPIC accesses
• Host-to-DMSoC interrupt controlled by HPIC accesses
NOTE: The device HPI does not support the HAS feature. For proper HPI operation if the HAS pin is
routed out, the HAS pin must be pulled up via an external resistor.
The device HPICTL register (0x01C4 0024) is part of the System Module Registers. The HPICTL register
controls write access to the HPI peripheral control and address registers as well as determines the host
time-out value.
6.23.2 HPI Bus Master
The HPI peripheral includes a bus master interface that allows external device initiated transfers to access
the DM365 system bus. See the Master Peripheral Mem Map column in Table 2-3, the device Memory
Map.
6.23.3 HPI Peripheral Register Description(s)
Table 6-99 lists the HPI registers, their corresponding acronyms, and the device memory locations
(offsets).
Offset
0h
4h
30h
34h
38h
Acronym
PID
PWREMU_MGMT
HPIC
HPIAW
HPIAR
Table 6-99. HPI Registers
Register Description
Peripheral Identification Register
Power and Emulation Management Register
Host Port Interface Control Register
Host Port Interface Write Address Register
Host Port Interface Read Address Register
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Peripheral Information and Electrical Specifications 195
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