TMS320VC5441 datasheet(40/86 Pages) TI

40 / 86 page

Functional Overview

December 1999 – Revised April 2002

SPRS122E

•

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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