TNETV2840ENGGU datasheet(41/91 Pages) TI1

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Functional Overview

December 1999 − Revised October 2008

SPRS122F

•

In the second mode, with RMCME = 1 and XMCME = 1, the McBSPs have 128-channel selection

capability. Twelve registers (RCERCx−RCERHx and XCERCx−XCERHx) are used to enable the

128-channel selection. The subaddresses of the registers are shown in Table 3−24. These registers,

functionally equivalent to the RCERA0−RCERB1 and XCERA0−XCERB1 registers, are used to

enable/disable the transmit and receive of additional channel partitions (C,D,E,F,G, and H) in the

128-channel stream. For example, XCERH1 is the transmit enable for channel partition H (channels 112

to 127) of McBSP1 for each DSP subsystem. See Figure 3−18, Table 3−8, Figure 3−19, and Table 3−9

for bit layouts and functions of the receive and transmit registers.

RCERyz15

RCERyz14

RCERyz13

RCERyz12

RCERyz11

RCERyz10

RCERyz9

RCERyz8

RW,+0

RCERyz7

RCERyz6

RCERyz5

RCERy4

RCERyz3

RCERyz2

RCERyz1

RCERyz0

RW,+0

LEGEND: R = Read, W = Write, +0 = Value at reset; y = Partition A,B,C,D,E,F,G, or H; z = McBSP 0,1, or 2

Figure 3−18. Receive Channel Enable Registers Bit Layout for Partitions A to H

Table 3−8. Receive Channel Enable Registers for Partitions A to H

Bit

Name

Function

15−0

RCERyz[15:0]

Receive Channel Enable Register

RCERyz n =0

Disables reception of nth channel in partition y.

RCERyz n =1

Enables reception of nth channel in partition y.

Note:

y = Partition A,B,C,D,E,F,G, or H; z = McBSP 0,1, or 2; n = bit 15−0

XCERyz15

XCERyz14

XCERyz13

XCERyz12

XCERyz11

XCERyz10

XCERyz9

XCERyz8

RW,+0

XCERyz7

XCERyz6

XCERyz5

XCERy4

XCERyz3

XCERyz2

XCERyz1

XCERyz0

RW,+0

LEGEND: R = Read, W = Write, +0 = Value at reset; y = Partition A,B,C,D,E,F,G, or H; z = McBSP 0,1, or 2

Figure 3−19. Transmit Channel Enable Registers Bit Layout for Partitions A to H

Table 3−9. Transmit Channel Enable Registers for Partitions A to H

Bit

Name

Function

15−0

XCERyz[15:0]

Transmit Channel Enable Register

XCERyz n =0

Disables transmit of nth channel in partition y.

XCERyz n =1

Enables transmit of nth channel in partition y.

LEGEND: y = Partition A,B,C,D,E,F,G, or H; z = McBSP 0,1, or 2; n = bit 15−0

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