TMS320TCI6618

Communications Infrastructure KeyStone SoC

www.ti.com

SPRS688—February 2011

 

7.25 Turbo Encoder Coprocessor (TCP3e)

The TCI6618 device has a high-performance embedded turbo-encoder coprocessor (TCP3e) that significantly speeds up channel-encoding operations on-chip for WCDMA, HSPA, HSPA+, TD-SCDMA, LTE, and WiMAX. Operating at CPU clock divided-by-3, the TCP3e is capable of processing data channels at a throughput of >200 Mbps. For more information, see the Turbo Encoder Coprocessor 3 (TCP3e) for KeyStone Devices User Guide

in ‘‘Related Documentation from Texas Instruments’’ on page 59.

7.26 Bit Rate Coprocessor (BCP)

The BCP is a hardware accelerator for wireless infrastructure. It performs most of the uplink and downlink layer 1 bit processing for 3G and 4G wireless standards. It supports LTE, FDD WCDMA, TD-SCDMA, and WiMAX 802.16-2009 standards. It supports various downlink processing blocks like CRC attachment, turbo encoding, rate matching, code block concatenation, scrambling, and modulation. It supports various uplink processing blocks like soft slicer, de-scrambler, de-concatenation, rate de-matching and LLR combining. For more information, see TMS320TCI6618 Bit Rate Coprocessor User Guide (TBD).

7.27 Serial RapidIO (SRIO) Port

The SRIO port on the TMS320TCI6618 device is a high-performance, low pin-count interconnect aimed for embedded markets. The use of the RapidIO interconnect in a baseband board design can create a homogeneous interconnect environment, providing even more connectivity and control among the components. RapidIO is based on the memory and device addressing concepts of processor buses where the transaction processing is managed completely by hardware. This enables the RapidIO interconnect to lower the system cost by providing lower latency, reduced overhead of packet data processing, and higher system bandwidth, all of which are key for wireless interfaces. For more information, see the Serial RapidIO (SRIO) for KeyStone Devices User Guide in ‘‘Related Documentation from Texas Instruments’’ on page 59.

7.28 General-Purpose Input/Output (GPIO)

7.28.1 GPIO Device-Specific Information

On the TMS320TCI6618, the GPIO peripheral pins GP[15:0] are also used to latch configuration pins. For more detailed information on device/peripheral configuration and the TCI6618 device pin muxing, see ‘‘Device Configuration’’ on page 60.

7.28.2 GPIO Electrical Data/Timing

Table 7-80

GPIO Input Timing Requirements (1)

 

 

 

(see Figure 7-54)

 

 

 

 

 

 

 

 

 

 

No.

 

 

Min

Max

Unit

1

tw(GPOH)

Pulse duration, GPOx high

12C

 

ns

2

tw(GPOL)

Pulse duration, GPOx low

12C

 

ns

End of Table 7-80

 

 

 

 

 

 

 

 

 

1 If CORECLKSEL = 0, C = 1 ÷ CORECLK(NIP) frequency, in ns. If CORECLKSEL = 1, C = 1 ÷ ALTCORECLK frequency, in ns.

Table 7-81

GPIO Output Switching Characteristics (1)

(2)

 

 

 

(see Figure 7-54)

 

 

 

 

 

 

 

 

 

 

 

 

No.

 

Parameter

 

Min

Max

Unit

1

tw(GPOH)

Pulse duration, GPOx high

 

36C - 8

 

ns

2

tw(GPOL)

Pulse duration, GPOx low

 

36C - 8

 

ns

End of Table 7-81

 

 

 

 

 

 

 

 

 

 

 

1 Over recommended operating conditions.

2 If CORECLKSEL = 0, C = 1 ÷ CORECLK(NIP) frequency, in ns. If CORECLKSEL = 1, C = 1 ÷ ALTCORECLK frequency, in ns.

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